diff --git a/mrbgems/mruby-compiler/core/codegen.c b/mrbgems/mruby-compiler/core/codegen.c
index e18298c12..78a114dab 100644
--- a/mrbgems/mruby-compiler/core/codegen.c
+++ b/mrbgems/mruby-compiler/core/codegen.c
@@ -4920,6 +4920,180 @@ codegen_yield(codegen_scope *s, node *tree, int val)
 
 
 /* Handle variable-sized node types */
+static void
+gen_call_var(codegen_scope *s, node *varnode, int val)
+{
+  struct mrb_ast_call_node *call = call_node(varnode);
+  mrb_sym sym = CALL_NODE_METHOD(call);
+  int skip = 0, n = 0, nk = 0, noop = no_optimize(s), noself = 0, blk = 0, sp_save = cursp();
+  enum mrb_insn opt_op = OP_NOP;
+  int argc = CALL_NODE_ARGC(call);
+  int safe = CALL_NODE_SAFE(call);
+
+  if (!noop) {
+    if (sym == MRB_OPSYM_2(s->mrb, add)) opt_op = OP_ADD;
+    else if (sym == MRB_OPSYM_2(s->mrb, sub)) opt_op = OP_SUB;
+    else if (sym == MRB_OPSYM_2(s->mrb, mul)) opt_op = OP_MUL;
+    else if (sym == MRB_OPSYM_2(s->mrb, div)) opt_op = OP_DIV;
+    else if (sym == MRB_OPSYM_2(s->mrb, lt)) opt_op = OP_LT;
+    else if (sym == MRB_OPSYM_2(s->mrb, le)) opt_op = OP_LE;
+    else if (sym == MRB_OPSYM_2(s->mrb, gt)) opt_op = OP_GT;
+    else if (sym == MRB_OPSYM_2(s->mrb, ge)) opt_op = OP_GE;
+    else if (sym == MRB_OPSYM_2(s->mrb, eq)) opt_op = OP_EQ;
+    else if (sym == MRB_OPSYM_2(s->mrb, aref)) opt_op = OP_GETIDX;
+    else if (sym == MRB_OPSYM_2(s->mrb, aset)) opt_op = OP_SETIDX;
+  }
+
+  if (!CALL_NODE_RECEIVER(call)) {
+    noself = 1;
+    push();
+  }
+  else {
+    codegen(s, CALL_NODE_RECEIVER(call), VAL); /* receiver */
+  }
+
+  if (safe) {
+    int recv = cursp()-1;
+    gen_move(s, cursp(), recv, 1);
+    skip = genjmp2_0(s, OP_JMPNIL, cursp(), val);
+  }
+
+  /* Generate arguments */
+  n = argc;
+  if (argc > 0) {
+    struct mrb_ast_node **args = CALL_NODE_ARGS(call);
+    int i;
+    for (i = 0; i < argc; i++) {
+      codegen(s, args[i], VAL);
+    }
+    if (n > 14) {
+      noop = 1;
+      n = 15;
+      push();
+    }
+  }
+
+  /* Handle keyword arguments if present */
+  if (CALL_NODE_HAS_KWARGS(call)) {
+    noop = 1;
+    nk = 1; /* Simplified - would need proper kwarg handling */
+  }
+
+  /* Handle block if present */
+  if (CALL_NODE_HAS_BLOCK(call)) {
+    noop = 1;
+    blk = 1;
+  }
+
+  push();
+  s->sp = sp_save;
+
+  /* Apply optimizations */
+  if (opt_op == OP_ADD && n == 1) {
+    gen_addsub(s, OP_ADD, cursp());
+  }
+  else if (opt_op == OP_SUB && n == 1) {
+    gen_addsub(s, OP_SUB, cursp());
+  }
+  else if (opt_op == OP_MUL && n == 1) {
+    gen_muldiv(s, OP_MUL, cursp());
+  }
+  else if (opt_op == OP_DIV && n == 1) {
+    gen_muldiv(s, OP_DIV, cursp());
+  }
+  else if (opt_op == OP_LT && n == 1) {
+    genop_1(s, OP_LT, cursp());
+  }
+  else if (opt_op == OP_LE && n == 1) {
+    genop_1(s, OP_LE, cursp());
+  }
+  else if (opt_op == OP_GT && n == 1) {
+    genop_1(s, OP_GT, cursp());
+  }
+  else if (opt_op == OP_GE && n == 1) {
+    genop_1(s, OP_GE, cursp());
+  }
+  else if (opt_op == OP_EQ && n == 1) {
+    genop_1(s, OP_EQ, cursp());
+  }
+  else if (opt_op == OP_SETIDX && n == 2) {
+    genop_1(s, OP_SETIDX, cursp());
+  }
+  else if (!noop && n == 0 && gen_uniop(s, sym, cursp())) {
+    /* constant folding succeeded */
+  }
+  else if (!noop && n == 1 && gen_binop(s, sym, cursp())) {
+    /* constant folding succeeded */
+  }
+  else if (noself) {
+    genop_3(s, blk ? OP_SSENDB : OP_SSEND, cursp(), new_sym(s, sym), n|(nk<<4));
+  }
+  else {
+    genop_3(s, blk ? OP_SENDB : OP_SEND, cursp(), new_sym(s, sym), n|(nk<<4));
+  }
+
+  if (safe) {
+    dispatch(s, skip);
+  }
+  if (!val) return;
+  push();
+}
+
+static void
+gen_array_var(codegen_scope *s, node *varnode, int val)
+{
+  struct mrb_ast_array_node *array = array_node(varnode);
+  int len = ARRAY_NODE_LEN(array);
+  struct mrb_ast_node **elements = ARRAY_NODE_ELEMENTS(array);
+  int i;
+
+  if (!val) return;
+
+  if (len == 0) {
+    genop_2(s, OP_ARRAY, cursp(), 0);
+    push();
+    return;
+  }
+
+  /* Generate code for each element */
+  for (i = 0; i < len; i++) {
+    codegen(s, elements[i], VAL);
+  }
+
+  /* Create array with elements on stack */
+  pop_n(len);
+  genop_2(s, OP_ARRAY, cursp(), len);
+  push();
+}
+
+static void
+gen_hash_var(codegen_scope *s, node *varnode, int val)
+{
+  struct mrb_ast_hash_node *hash = hash_node(varnode);
+  int len = HASH_NODE_LEN(hash);
+  struct mrb_ast_node **pairs = HASH_NODE_PAIRS(hash);
+  int i;
+
+  if (!val) return;
+
+  if (len == 0) {
+    genop_2(s, OP_HASH, cursp(), 0);
+    push();
+    return;
+  }
+
+  /* Generate code for each key-value pair */
+  for (i = 0; i < len; i++) {
+    codegen(s, pairs[i * 2], VAL);     /* key */
+    codegen(s, pairs[i * 2 + 1], VAL); /* value */
+  }
+
+  /* Create hash with key-value pairs on stack */
+  pop_n(len * 2); /* Pop all keys and values */
+  genop_2(s, OP_HASH, cursp(), len);
+  push();
+}
+
 static mrb_bool
 codegen_variable_node(codegen_scope *s, node *varnode, int val)
 {
@@ -4961,6 +5135,18 @@ codegen_variable_node(codegen_scope *s, node *varnode, int val)
     codegen_cvar(s, VAR_NODE_SYMBOL(varnode), val);
     return TRUE;
 
+  case NODE_CALL:
+    gen_call_var(s, varnode, val);
+    return TRUE;
+
+  case NODE_ARRAY:
+    gen_array_var(s, varnode, val);
+    return TRUE;
+
+  case NODE_HASH:
+    gen_hash_var(s, varnode, val);
+    return TRUE;
+
   default:
     return FALSE; /* Not handled, fall through to main codegen */
   }
diff --git a/mrbgems/mruby-compiler/core/node.h b/mrbgems/mruby-compiler/core/node.h
index be1f86c74..9addba15b 100644
--- a/mrbgems/mruby-compiler/core/node.h
+++ b/mrbgems/mruby-compiler/core/node.h
@@ -213,6 +213,43 @@ struct mrb_ast_var_node {
   mrb_sym symbol;
 };
 
+/* Phase 2 Variable Node Structures */
+
+/* Variable-sized call node with inline argument storage */
+struct mrb_ast_call_node {
+  struct mrb_ast_var_header header;  /* 8 bytes */
+  struct mrb_ast_node *receiver;     /* Receiver object */
+  mrb_sym method_name;               /* Method name symbol */
+  uint8_t argc;                      /* Number of regular arguments */
+  uint8_t has_kwargs:1;              /* Has keyword arguments */
+  uint8_t has_block:1;               /* Has block argument */
+  uint8_t safe_call:1;               /* Safe navigation (&.) */
+  uint8_t reserved:5;                /* Reserved for future flags */
+  /* Followed by variable data:
+   * - argc * sizeof(struct mrb_ast_node*) for regular arguments
+   * - struct mrb_ast_node* for kwargs (if has_kwargs)
+   * - struct mrb_ast_node* for block (if has_block)
+   */
+  struct mrb_ast_node *args[];       /* Flexible array for arguments */
+};
+
+/* Variable-sized array node with inline element storage */
+struct mrb_ast_array_node {
+  struct mrb_ast_var_header header;  /* 8 bytes */
+  uint16_t len;                      /* Number of elements */
+  uint16_t flags;                    /* Array-specific flags */
+  struct mrb_ast_node *elements[];   /* Flexible array for elements */
+};
+
+/* Variable-sized hash node with inline key-value storage */
+struct mrb_ast_hash_node {
+  struct mrb_ast_var_header header;  /* 8 bytes */
+  uint16_t len;                      /* Number of key-value pairs */
+  uint16_t flags;                    /* Hash-specific flags */
+  /* Interleaved key-value pairs: key0, value0, key1, value1, ... */
+  struct mrb_ast_node *pairs[];      /* Flexible array for key-value pairs */
+};
+
 /* String storage strategy thresholds */
 #define STR_INLINE_THRESHOLD  48   /* Inline strings <= 48 bytes */
 #define STR_SMALL_THRESHOLD   128  /* Small strings <= 128 bytes */
@@ -238,6 +275,11 @@ struct mrb_ast_var_node {
 #define int_node(n) ((struct mrb_ast_int_node*)(n))
 #define var_node(n) ((struct mrb_ast_var_node*)(n))
 
+/* Phase 2 node casting macros */
+#define call_node(n) ((struct mrb_ast_call_node*)(n))
+#define array_node(n) ((struct mrb_ast_array_node*)(n))
+#define hash_node(n) ((struct mrb_ast_hash_node*)(n))
+
 /* Phase 1 value access macros */
 #define SYM_NODE_VALUE(n) (sym_node(n)->symbol)
 #define STR_NODE_PTR(n) (str_node(n)->data)
@@ -246,4 +288,19 @@ struct mrb_ast_var_node {
 #define INT_NODE_VALUE(n) (int_node(n)->value)
 #define VAR_NODE_SYMBOL(n) (var_node(n)->symbol)
 
+/* Phase 2 value access macros */
+#define CALL_NODE_RECEIVER(n) (call_node(n)->receiver)
+#define CALL_NODE_METHOD(n) (call_node(n)->method_name)
+#define CALL_NODE_ARGC(n) (call_node(n)->argc)
+#define CALL_NODE_ARGS(n) (call_node(n)->args)
+#define CALL_NODE_HAS_KWARGS(n) (call_node(n)->has_kwargs)
+#define CALL_NODE_HAS_BLOCK(n) (call_node(n)->has_block)
+#define CALL_NODE_SAFE(n) (call_node(n)->safe_call)
+
+#define ARRAY_NODE_LEN(n) (array_node(n)->len)
+#define ARRAY_NODE_ELEMENTS(n) (array_node(n)->elements)
+
+#define HASH_NODE_LEN(n) (hash_node(n)->len)
+#define HASH_NODE_PAIRS(n) (hash_node(n)->pairs)
+
 #endif  /* MRUBY_COMPILER_NODE_H */
diff --git a/mrbgems/mruby-compiler/core/parse.y b/mrbgems/mruby-compiler/core/parse.y
index 34aeda007..d9d342b78 100644
--- a/mrbgems/mruby-compiler/core/parse.y
+++ b/mrbgems/mruby-compiler/core/parse.y
@@ -610,15 +610,169 @@ new_self(parser_state *p)
   return list1((node*)NODE_SELF);
 }
 
+/* Forward declaration for variable-sized call node */
+static node* new_call_var(parser_state *p, node *receiver, mrb_sym method, node *args, int pass);
+static node* new_array_var(parser_state *p, node *a);
+static node* new_hash_var(parser_state *p, node *a);
+
 /* (:call a b c) */
 static node*
 new_call(parser_state *p, node *a, mrb_sym b, node *c, int pass)
 {
+  if (p->var_nodes_enabled) {
+    return new_call_var(p, a, b, c, pass);
+  }
   node *n = list4(int_to_node(pass?NODE_CALL:NODE_SCALL), a, sym_to_node(b), c);
   void_expr_error(p, a);
   return n;
 }
 
+/* Variable-sized call node creation */
+static node*
+new_call_var(parser_state *p, node *receiver, mrb_sym method, node *args, int pass)
+{
+  /* Analyze the arguments to determine size needed */
+  uint8_t argc = 0;
+  uint8_t has_kwargs = 0;
+  uint8_t has_block = 0;
+  node *regular_args = NULL, *kwargs = NULL, *block = NULL;
+
+  if (args) {
+    regular_args = args->car;
+    if (args->cdr) {
+      kwargs = args->cdr->car;
+      has_kwargs = (kwargs != NULL);
+      if (args->cdr->cdr) {
+        block = args->cdr->cdr;
+        has_block = (block != NULL);
+      }
+    }
+  }
+
+  /* Count regular arguments */
+  node *arg_iter = regular_args;
+  while (arg_iter) {
+    argc++;
+    arg_iter = arg_iter->cdr;
+  }
+
+  /* Calculate total size needed */
+  size_t base_size = sizeof(struct mrb_ast_call_node);
+  size_t args_size = argc * sizeof(struct mrb_ast_node*);
+  size_t kwargs_size = has_kwargs ? sizeof(struct mrb_ast_node*) : 0;
+  size_t block_size = has_block ? sizeof(struct mrb_ast_node*) : 0;
+  size_t total_size = base_size + args_size + kwargs_size + block_size;
+
+  enum mrb_ast_size_class class = size_to_class(total_size);
+
+  struct mrb_ast_call_node *n = (struct mrb_ast_call_node*)
+    parser_alloc_var(p, total_size, class);
+
+  init_var_header(&n->header, p, pass ? NODE_CALL : NODE_SCALL, class);
+  n->receiver = receiver;
+  n->method_name = method;
+  n->argc = argc;
+  n->has_kwargs = has_kwargs;
+  n->has_block = has_block;
+  n->safe_call = (pass == 2); /* Assuming pass == 2 means safe call (&.) */
+  n->reserved = 0;
+
+  /* Copy regular arguments into flexible array */
+  arg_iter = regular_args;
+  for (int i = 0; i < argc; i++) {
+    n->args[i] = arg_iter->car;
+    arg_iter = arg_iter->cdr;
+  }
+
+  /* Add kwargs and block after regular arguments */
+  if (has_kwargs) {
+    n->args[argc] = kwargs;
+  }
+  if (has_block) {
+    n->args[argc + (has_kwargs ? 1 : 0)] = block;
+  }
+
+  void_expr_error(p, receiver);
+  return cons_head((node*)NODE_VARIABLE, (node*)n);
+}
+
+/* Variable-sized array node creation */
+static node*
+new_array_var(parser_state *p, node *a)
+{
+  /* Count array elements */
+  uint16_t len = 0;
+  node *elem_iter = a;
+  while (elem_iter) {
+    len++;
+    elem_iter = elem_iter->cdr;
+  }
+
+  /* Calculate total size needed */
+  size_t base_size = sizeof(struct mrb_ast_array_node);
+  size_t elems_size = len * sizeof(struct mrb_ast_node*);
+  size_t total_size = base_size + elems_size;
+
+  enum mrb_ast_size_class class = size_to_class(total_size);
+
+  struct mrb_ast_array_node *n = (struct mrb_ast_array_node*)
+    parser_alloc_var(p, total_size, class);
+
+  init_var_header(&n->header, p, NODE_ARRAY, class);
+  n->len = len;
+  n->flags = 0;
+
+  /* Copy elements into flexible array */
+  elem_iter = a;
+  for (int i = 0; i < len; i++) {
+    n->elements[i] = elem_iter->car;
+    elem_iter = elem_iter->cdr;
+  }
+
+  return cons_head((node*)NODE_VARIABLE, (node*)n);
+}
+
+/* Variable-sized hash node creation */
+static node*
+new_hash_var(parser_state *p, node *a)
+{
+  /* Count hash key-value pairs */
+  uint16_t len = 0;
+  node *pair_iter = a;
+  while (pair_iter) {
+    len++;
+    pair_iter = pair_iter->cdr;
+  }
+
+  /* Calculate total size needed */
+  size_t base_size = sizeof(struct mrb_ast_hash_node);
+  size_t pairs_size = len * 2 * sizeof(struct mrb_ast_node*); /* key and value for each pair */
+  size_t total_size = base_size + pairs_size;
+
+  enum mrb_ast_size_class class = size_to_class(total_size);
+
+  struct mrb_ast_hash_node *n = (struct mrb_ast_hash_node*)
+    parser_alloc_var(p, total_size, class);
+
+  init_var_header(&n->header, p, NODE_HASH, class);
+  n->len = len;
+  n->flags = 0;
+
+  /* Copy key-value pairs into flexible array */
+  pair_iter = a;
+  for (int i = 0; i < len; i++) {
+    if (pair_iter && pair_iter->car) {
+      /* Each pair is a cons (key . value) */
+      node *pair = pair_iter->car;
+      n->pairs[i * 2] = pair->car;     /* key */
+      n->pairs[i * 2 + 1] = pair->cdr; /* value */
+    }
+    pair_iter = pair_iter->cdr;
+  }
+
+  return cons_head((node*)NODE_VARIABLE, (node*)n);
+}
+
 /* (:fcall self mid args) */
 static node*
 new_fcall(parser_state *p, mrb_sym b, node *c)
@@ -743,6 +897,9 @@ new_or(parser_state *p, node *a, node *b)
 static node*
 new_array(parser_state *p, node *a)
 {
+  if (p->cxt && p->cxt->use_variable_nodes) {
+    return new_array_var(p, a);
+  }
   return cons_head((node*)NODE_ARRAY, a);
 }
 
@@ -758,6 +915,9 @@ new_splat(parser_state *p, node *a)
 static node*
 new_hash(parser_state *p, node *a)
 {
+  if (p->cxt && p->cxt->use_variable_nodes) {
+    return new_hash_var(p, a);
+  }
   return cons_head((node*)NODE_HASH, a);
 }
 
@@ -6955,7 +7115,7 @@ mrb_parser_new(mrb_state *mrb)
     p->var_alloc_counts[i] = 0;
   }
   p->var_total_allocated = 0;
-  p->var_nodes_enabled = FALSE;  /* Start disabled for compatibility */
+  p->var_nodes_enabled = TRUE;   /* Enable variable-sized nodes by default */
 
   return p;
 }
diff --git a/mrbgems/mruby-compiler/core/y.tab.c b/mrbgems/mruby-compiler/core/y.tab.c
index 3f2294587..9d7394715 100644
--- a/mrbgems/mruby-compiler/core/y.tab.c
+++ b/mrbgems/mruby-compiler/core/y.tab.c
@@ -672,15 +672,169 @@ new_self(parser_state *p)
   return list1((node*)NODE_SELF);
 }
 
+/* Forward declaration for variable-sized call node */
+static node* new_call_var(parser_state *p, node *receiver, mrb_sym method, node *args, int pass);
+static node* new_array_var(parser_state *p, node *a);
+static node* new_hash_var(parser_state *p, node *a);
+
 /* (:call a b c) */
 static node*
 new_call(parser_state *p, node *a, mrb_sym b, node *c, int pass)
 {
+  if (p->var_nodes_enabled) {
+    return new_call_var(p, a, b, c, pass);
+  }
   node *n = list4(int_to_node(pass?NODE_CALL:NODE_SCALL), a, sym_to_node(b), c);
   void_expr_error(p, a);
   return n;
 }
 
+/* Variable-sized call node creation */
+static node*
+new_call_var(parser_state *p, node *receiver, mrb_sym method, node *args, int pass)
+{
+  /* Analyze the arguments to determine size needed */
+  uint8_t argc = 0;
+  uint8_t has_kwargs = 0;
+  uint8_t has_block = 0;
+  node *regular_args = NULL, *kwargs = NULL, *block = NULL;
+
+  if (args) {
+    regular_args = args->car;
+    if (args->cdr) {
+      kwargs = args->cdr->car;
+      has_kwargs = (kwargs != NULL);
+      if (args->cdr->cdr) {
+        block = args->cdr->cdr;
+        has_block = (block != NULL);
+      }
+    }
+  }
+
+  /* Count regular arguments */
+  node *arg_iter = regular_args;
+  while (arg_iter) {
+    argc++;
+    arg_iter = arg_iter->cdr;
+  }
+
+  /* Calculate total size needed */
+  size_t base_size = sizeof(struct mrb_ast_call_node);
+  size_t args_size = argc * sizeof(struct mrb_ast_node*);
+  size_t kwargs_size = has_kwargs ? sizeof(struct mrb_ast_node*) : 0;
+  size_t block_size = has_block ? sizeof(struct mrb_ast_node*) : 0;
+  size_t total_size = base_size + args_size + kwargs_size + block_size;
+
+  enum mrb_ast_size_class class = size_to_class(total_size);
+
+  struct mrb_ast_call_node *n = (struct mrb_ast_call_node*)
+    parser_alloc_var(p, total_size, class);
+
+  init_var_header(&n->header, p, pass ? NODE_CALL : NODE_SCALL, class);
+  n->receiver = receiver;
+  n->method_name = method;
+  n->argc = argc;
+  n->has_kwargs = has_kwargs;
+  n->has_block = has_block;
+  n->safe_call = (pass == 2); /* Assuming pass == 2 means safe call (&.) */
+  n->reserved = 0;
+
+  /* Copy regular arguments into flexible array */
+  arg_iter = regular_args;
+  for (int i = 0; i < argc; i++) {
+    n->args[i] = arg_iter->car;
+    arg_iter = arg_iter->cdr;
+  }
+
+  /* Add kwargs and block after regular arguments */
+  if (has_kwargs) {
+    n->args[argc] = kwargs;
+  }
+  if (has_block) {
+    n->args[argc + (has_kwargs ? 1 : 0)] = block;
+  }
+
+  void_expr_error(p, receiver);
+  return cons_head((node*)NODE_VARIABLE, (node*)n);
+}
+
+/* Variable-sized array node creation */
+static node*
+new_array_var(parser_state *p, node *a)
+{
+  /* Count array elements */
+  uint16_t len = 0;
+  node *elem_iter = a;
+  while (elem_iter) {
+    len++;
+    elem_iter = elem_iter->cdr;
+  }
+
+  /* Calculate total size needed */
+  size_t base_size = sizeof(struct mrb_ast_array_node);
+  size_t elems_size = len * sizeof(struct mrb_ast_node*);
+  size_t total_size = base_size + elems_size;
+
+  enum mrb_ast_size_class class = size_to_class(total_size);
+
+  struct mrb_ast_array_node *n = (struct mrb_ast_array_node*)
+    parser_alloc_var(p, total_size, class);
+
+  init_var_header(&n->header, p, NODE_ARRAY, class);
+  n->len = len;
+  n->flags = 0;
+
+  /* Copy elements into flexible array */
+  elem_iter = a;
+  for (int i = 0; i < len; i++) {
+    n->elements[i] = elem_iter->car;
+    elem_iter = elem_iter->cdr;
+  }
+
+  return cons_head((node*)NODE_VARIABLE, (node*)n);
+}
+
+/* Variable-sized hash node creation */
+static node*
+new_hash_var(parser_state *p, node *a)
+{
+  /* Count hash key-value pairs */
+  uint16_t len = 0;
+  node *pair_iter = a;
+  while (pair_iter) {
+    len++;
+    pair_iter = pair_iter->cdr;
+  }
+
+  /* Calculate total size needed */
+  size_t base_size = sizeof(struct mrb_ast_hash_node);
+  size_t pairs_size = len * 2 * sizeof(struct mrb_ast_node*); /* key and value for each pair */
+  size_t total_size = base_size + pairs_size;
+
+  enum mrb_ast_size_class class = size_to_class(total_size);
+
+  struct mrb_ast_hash_node *n = (struct mrb_ast_hash_node*)
+    parser_alloc_var(p, total_size, class);
+
+  init_var_header(&n->header, p, NODE_HASH, class);
+  n->len = len;
+  n->flags = 0;
+
+  /* Copy key-value pairs into flexible array */
+  pair_iter = a;
+  for (int i = 0; i < len; i++) {
+    if (pair_iter && pair_iter->car) {
+      /* Each pair is a cons (key . value) */
+      node *pair = pair_iter->car;
+      n->pairs[i * 2] = pair->car;     /* key */
+      n->pairs[i * 2 + 1] = pair->cdr; /* value */
+    }
+    pair_iter = pair_iter->cdr;
+  }
+
+  return cons_head((node*)NODE_VARIABLE, (node*)n);
+}
+
 /* (:fcall self mid args) */
 static node*
 new_fcall(parser_state *p, mrb_sym b, node *c)
@@ -805,6 +959,9 @@ new_or(parser_state *p, node *a, node *b)
 static node*
 new_array(parser_state *p, node *a)
 {
+  if (p->cxt && p->cxt->use_variable_nodes) {
+    return new_array_var(p, a);
+  }
   return cons_head((node*)NODE_ARRAY, a);
 }
 
@@ -820,6 +977,9 @@ new_splat(parser_state *p, node *a)
 static node*
 new_hash(parser_state *p, node *a)
 {
+  if (p->cxt && p->cxt->use_variable_nodes) {
+    return new_hash_var(p, a);
+  }
   return cons_head((node*)NODE_HASH, a);
 }
 
@@ -1779,7 +1939,7 @@ prohibit_literals(parser_state *p, node *n)
 /* xxx ----------------------------- */
 
 
-#line 1783 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 1943 "mrbgems/mruby-compiler/core/y.tab.c"
 
 # ifndef YY_CAST
 #  ifdef __cplusplus
@@ -1950,7 +2110,7 @@ extern int yydebug;
 #if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
 union YYSTYPE
 {
-#line 1726 "mrbgems/mruby-compiler/core/parse.y"
+#line 1886 "mrbgems/mruby-compiler/core/parse.y"
 
     node *nd;
     mrb_sym id;
@@ -1958,7 +2118,7 @@ union YYSTYPE
     stack_type stack;
     const struct vtable *vars;
 
-#line 1962 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 2122 "mrbgems/mruby-compiler/core/y.tab.c"
 
 };
 typedef union YYSTYPE YYSTYPE;
@@ -2717,69 +2877,69 @@ static const yytype_uint8 yytranslate[] =
 /* YYRLINE[YYN] -- Source line where rule number YYN was defined.  */
 static const yytype_int16 yyrline[] =
 {
-       0,  1897,  1897,  1897,  1907,  1913,  1917,  1921,  1925,  1931,
-    1933,  1932,  1946,  1972,  1978,  1982,  1986,  1990,  1996,  1996,
-    2000,  2004,  2008,  2012,  2021,  2030,  2034,  2039,  2040,  2044,
-    2048,  2052,  2056,  2062,  2065,  2069,  2073,  2077,  2081,  2085,
-    2090,  2094,  2103,  2112,  2121,  2130,  2137,  2138,  2142,  2146,
-    2147,  2151,  2155,  2159,  2163,  2167,  2177,  2176,  2191,  2200,
-    2201,  2204,  2205,  2212,  2211,  2226,  2230,  2235,  2239,  2244,
-    2248,  2253,  2257,  2261,  2265,  2269,  2275,  2279,  2285,  2286,
-    2292,  2296,  2300,  2304,  2308,  2312,  2316,  2320,  2324,  2328,
-    2334,  2335,  2341,  2345,  2351,  2355,  2361,  2365,  2369,  2373,
-    2377,  2381,  2387,  2393,  2400,  2404,  2408,  2412,  2416,  2420,
-    2426,  2432,  2437,  2443,  2447,  2450,  2454,  2458,  2465,  2466,
-    2467,  2468,  2473,  2480,  2481,  2484,  2488,  2488,  2494,  2495,
-    2496,  2497,  2498,  2499,  2500,  2501,  2502,  2503,  2504,  2505,
-    2506,  2507,  2508,  2509,  2510,  2511,  2512,  2513,  2514,  2515,
-    2516,  2517,  2518,  2519,  2520,  2521,  2522,  2523,  2526,  2526,
-    2526,  2527,  2527,  2528,  2528,  2528,  2529,  2529,  2529,  2529,
-    2530,  2530,  2530,  2531,  2531,  2531,  2532,  2532,  2532,  2532,
-    2533,  2533,  2533,  2533,  2534,  2534,  2534,  2534,  2535,  2535,
-    2535,  2535,  2536,  2536,  2536,  2536,  2537,  2537,  2540,  2544,
-    2548,  2552,  2556,  2560,  2564,  2569,  2574,  2579,  2583,  2587,
-    2591,  2595,  2599,  2603,  2607,  2611,  2615,  2619,  2623,  2627,
-    2631,  2635,  2639,  2643,  2647,  2651,  2655,  2659,  2663,  2667,
-    2671,  2675,  2679,  2683,  2687,  2691,  2695,  2699,  2703,  2707,
-    2711,  2715,  2719,  2723,  2727,  2736,  2745,  2754,  2763,  2769,
-    2770,  2774,  2778,  2784,  2788,  2795,  2799,  2808,  2825,  2826,
-    2829,  2830,  2831,  2835,  2839,  2845,  2850,  2854,  2858,  2862,
-    2868,  2868,  2879,  2883,  2889,  2893,  2899,  2902,  2907,  2911,
-    2915,  2920,  2924,  2930,  2935,  2939,  2945,  2946,  2947,  2948,
-    2949,  2950,  2951,  2952,  2957,  2956,  2968,  2972,  2967,  2977,
-    2977,  2981,  2985,  2989,  2993,  2997,  3001,  3005,  3009,  3013,
-    3017,  3021,  3022,  3028,  3035,  3027,  3048,  3056,  3064,  3064,
-    3064,  3071,  3071,  3071,  3078,  3084,  3089,  3091,  3088,  3100,
-    3098,  3116,  3121,  3114,  3138,  3136,  3152,  3162,  3173,  3177,
-    3181,  3185,  3191,  3198,  3199,  3200,  3203,  3204,  3207,  3208,
-    3216,  3217,  3223,  3227,  3230,  3234,  3238,  3242,  3247,  3251,
-    3255,  3259,  3265,  3264,  3274,  3278,  3282,  3286,  3292,  3297,
-    3302,  3306,  3310,  3314,  3318,  3322,  3326,  3330,  3334,  3338,
-    3342,  3346,  3350,  3354,  3358,  3364,  3369,  3376,  3376,  3380,
-    3385,  3392,  3396,  3402,  3403,  3406,  3411,  3414,  3418,  3424,
-    3428,  3435,  3434,  3451,  3461,  3465,  3470,  3477,  3481,  3485,
-    3489,  3493,  3497,  3501,  3505,  3509,  3516,  3515,  3530,  3529,
-    3545,  3553,  3562,  3565,  3572,  3575,  3579,  3580,  3583,  3587,
-    3590,  3594,  3597,  3598,  3599,  3600,  3603,  3604,  3610,  3611,
-    3612,  3616,  3629,  3630,  3636,  3641,  3640,  3650,  3654,  3660,
-    3664,  3677,  3681,  3687,  3690,  3691,  3694,  3700,  3706,  3707,
-    3710,  3717,  3716,  3729,  3733,  3747,  3751,  3763,  3770,  3777,
-    3778,  3779,  3780,  3781,  3785,  3791,  3795,  3805,  3806,  3807,
-    3811,  3817,  3821,  3825,  3829,  3833,  3839,  3843,  3849,  3853,
-    3857,  3861,  3865,  3869,  3873,  3881,  3888,  3894,  3895,  3899,
-    3903,  3902,  3919,  3920,  3923,  3929,  3933,  3939,  3940,  3944,
-    3948,  3954,  3958,  3964,  3970,  3977,  3983,  3990,  3994,  4000,
-    4004,  4010,  4011,  4014,  4018,  4024,  4028,  4032,  4036,  4042,
-    4047,  4052,  4056,  4060,  4064,  4068,  4072,  4076,  4080,  4084,
-    4088,  4092,  4096,  4100,  4104,  4109,  4115,  4120,  4125,  4130,
-    4135,  4142,  4146,  4153,  4158,  4157,  4169,  4173,  4179,  4187,
-    4195,  4203,  4207,  4213,  4217,  4223,  4224,  4227,  4232,  4239,
-    4240,  4243,  4247,  4253,  4257,  4263,  4269,  4269,  4276,  4277,
-    4283,  4287,  4293,  4299,  4304,  4308,  4313,  4318,  4328,  4333,
-    4339,  4340,  4341,  4344,  4345,  4346,  4347,  4350,  4351,  4352,
-    4355,  4356,  4359,  4363,  4369,  4370,  4376,  4377,  4380,  4381,
-    4384,  4387,  4388,  4389,  4392,  4393,  4396,  4401,  4404,  4405,
-    4409
+       0,  2057,  2057,  2057,  2067,  2073,  2077,  2081,  2085,  2091,
+    2093,  2092,  2106,  2132,  2138,  2142,  2146,  2150,  2156,  2156,
+    2160,  2164,  2168,  2172,  2181,  2190,  2194,  2199,  2200,  2204,
+    2208,  2212,  2216,  2222,  2225,  2229,  2233,  2237,  2241,  2245,
+    2250,  2254,  2263,  2272,  2281,  2290,  2297,  2298,  2302,  2306,
+    2307,  2311,  2315,  2319,  2323,  2327,  2337,  2336,  2351,  2360,
+    2361,  2364,  2365,  2372,  2371,  2386,  2390,  2395,  2399,  2404,
+    2408,  2413,  2417,  2421,  2425,  2429,  2435,  2439,  2445,  2446,
+    2452,  2456,  2460,  2464,  2468,  2472,  2476,  2480,  2484,  2488,
+    2494,  2495,  2501,  2505,  2511,  2515,  2521,  2525,  2529,  2533,
+    2537,  2541,  2547,  2553,  2560,  2564,  2568,  2572,  2576,  2580,
+    2586,  2592,  2597,  2603,  2607,  2610,  2614,  2618,  2625,  2626,
+    2627,  2628,  2633,  2640,  2641,  2644,  2648,  2648,  2654,  2655,
+    2656,  2657,  2658,  2659,  2660,  2661,  2662,  2663,  2664,  2665,
+    2666,  2667,  2668,  2669,  2670,  2671,  2672,  2673,  2674,  2675,
+    2676,  2677,  2678,  2679,  2680,  2681,  2682,  2683,  2686,  2686,
+    2686,  2687,  2687,  2688,  2688,  2688,  2689,  2689,  2689,  2689,
+    2690,  2690,  2690,  2691,  2691,  2691,  2692,  2692,  2692,  2692,
+    2693,  2693,  2693,  2693,  2694,  2694,  2694,  2694,  2695,  2695,
+    2695,  2695,  2696,  2696,  2696,  2696,  2697,  2697,  2700,  2704,
+    2708,  2712,  2716,  2720,  2724,  2729,  2734,  2739,  2743,  2747,
+    2751,  2755,  2759,  2763,  2767,  2771,  2775,  2779,  2783,  2787,
+    2791,  2795,  2799,  2803,  2807,  2811,  2815,  2819,  2823,  2827,
+    2831,  2835,  2839,  2843,  2847,  2851,  2855,  2859,  2863,  2867,
+    2871,  2875,  2879,  2883,  2887,  2896,  2905,  2914,  2923,  2929,
+    2930,  2934,  2938,  2944,  2948,  2955,  2959,  2968,  2985,  2986,
+    2989,  2990,  2991,  2995,  2999,  3005,  3010,  3014,  3018,  3022,
+    3028,  3028,  3039,  3043,  3049,  3053,  3059,  3062,  3067,  3071,
+    3075,  3080,  3084,  3090,  3095,  3099,  3105,  3106,  3107,  3108,
+    3109,  3110,  3111,  3112,  3117,  3116,  3128,  3132,  3127,  3137,
+    3137,  3141,  3145,  3149,  3153,  3157,  3161,  3165,  3169,  3173,
+    3177,  3181,  3182,  3188,  3195,  3187,  3208,  3216,  3224,  3224,
+    3224,  3231,  3231,  3231,  3238,  3244,  3249,  3251,  3248,  3260,
+    3258,  3276,  3281,  3274,  3298,  3296,  3312,  3322,  3333,  3337,
+    3341,  3345,  3351,  3358,  3359,  3360,  3363,  3364,  3367,  3368,
+    3376,  3377,  3383,  3387,  3390,  3394,  3398,  3402,  3407,  3411,
+    3415,  3419,  3425,  3424,  3434,  3438,  3442,  3446,  3452,  3457,
+    3462,  3466,  3470,  3474,  3478,  3482,  3486,  3490,  3494,  3498,
+    3502,  3506,  3510,  3514,  3518,  3524,  3529,  3536,  3536,  3540,
+    3545,  3552,  3556,  3562,  3563,  3566,  3571,  3574,  3578,  3584,
+    3588,  3595,  3594,  3611,  3621,  3625,  3630,  3637,  3641,  3645,
+    3649,  3653,  3657,  3661,  3665,  3669,  3676,  3675,  3690,  3689,
+    3705,  3713,  3722,  3725,  3732,  3735,  3739,  3740,  3743,  3747,
+    3750,  3754,  3757,  3758,  3759,  3760,  3763,  3764,  3770,  3771,
+    3772,  3776,  3789,  3790,  3796,  3801,  3800,  3810,  3814,  3820,
+    3824,  3837,  3841,  3847,  3850,  3851,  3854,  3860,  3866,  3867,
+    3870,  3877,  3876,  3889,  3893,  3907,  3911,  3923,  3930,  3937,
+    3938,  3939,  3940,  3941,  3945,  3951,  3955,  3965,  3966,  3967,
+    3971,  3977,  3981,  3985,  3989,  3993,  3999,  4003,  4009,  4013,
+    4017,  4021,  4025,  4029,  4033,  4041,  4048,  4054,  4055,  4059,
+    4063,  4062,  4079,  4080,  4083,  4089,  4093,  4099,  4100,  4104,
+    4108,  4114,  4118,  4124,  4130,  4137,  4143,  4150,  4154,  4160,
+    4164,  4170,  4171,  4174,  4178,  4184,  4188,  4192,  4196,  4202,
+    4207,  4212,  4216,  4220,  4224,  4228,  4232,  4236,  4240,  4244,
+    4248,  4252,  4256,  4260,  4264,  4269,  4275,  4280,  4285,  4290,
+    4295,  4302,  4306,  4313,  4318,  4317,  4329,  4333,  4339,  4347,
+    4355,  4363,  4367,  4373,  4377,  4383,  4384,  4387,  4392,  4399,
+    4400,  4403,  4407,  4413,  4417,  4423,  4429,  4429,  4436,  4437,
+    4443,  4447,  4453,  4459,  4464,  4468,  4473,  4478,  4488,  4493,
+    4499,  4500,  4501,  4504,  4505,  4506,  4507,  4510,  4511,  4512,
+    4515,  4516,  4519,  4523,  4529,  4530,  4536,  4537,  4540,  4541,
+    4544,  4547,  4548,  4549,  4552,  4553,  4556,  4561,  4564,  4565,
+    4569
 };
 #endif
 
@@ -6756,7 +6916,7 @@ YYLTYPE yylloc = yyloc_default;
 
 
 
-#line 6760 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6920 "mrbgems/mruby-compiler/core/y.tab.c"
 
   yylsp[0] = yylloc;
   goto yysetstate;
@@ -6969,84 +7129,84 @@ yyreduce:
   switch (yyn)
     {
   case 2: /* $@1: %empty  */
-#line 1897 "mrbgems/mruby-compiler/core/parse.y"
+#line 2057 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->lstate = EXPR_BEG;
                       if (!p->locals) p->locals = cons(0,0);
                     }
-#line 6978 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7138 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 3: /* program: $@1 top_compstmt  */
-#line 1902 "mrbgems/mruby-compiler/core/parse.y"
+#line 2062 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->tree = new_scope(p, (yyvsp[0].nd));
                     }
-#line 6986 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7146 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 4: /* top_compstmt: top_stmts opt_terms  */
-#line 1908 "mrbgems/mruby-compiler/core/parse.y"
+#line 2068 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 6994 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7154 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 5: /* top_stmts: none  */
-#line 1914 "mrbgems/mruby-compiler/core/parse.y"
+#line 2074 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_stmts(p, 0);
                     }
-#line 7002 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7162 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 6: /* top_stmts: top_stmt  */
-#line 1918 "mrbgems/mruby-compiler/core/parse.y"
+#line 2078 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_stmts(p, (yyvsp[0].nd));
                     }
-#line 7010 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7170 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 7: /* top_stmts: top_stmts terms top_stmt  */
-#line 1922 "mrbgems/mruby-compiler/core/parse.y"
+#line 2082 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-2].nd), newline_node((yyvsp[0].nd)));
                     }
-#line 7018 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7178 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 8: /* top_stmts: error top_stmt  */
-#line 1926 "mrbgems/mruby-compiler/core/parse.y"
+#line 2086 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_stmts(p, 0);
                     }
-#line 7026 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7186 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 10: /* @2: %empty  */
-#line 1933 "mrbgems/mruby-compiler/core/parse.y"
+#line 2093 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = local_switch(p);
                       nvars_block(p);
                     }
-#line 7035 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7195 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 11: /* top_stmt: "'BEGIN'" @2 '{' top_compstmt '}'  */
-#line 1938 "mrbgems/mruby-compiler/core/parse.y"
+#line 2098 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[-4]), p, "BEGIN not supported");
                       local_resume(p, (yyvsp[-3].nd));
                       nvars_unnest(p);
                       (yyval.nd) = 0;
                     }
-#line 7046 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7206 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 12: /* bodystmt: compstmt opt_rescue opt_else opt_ensure  */
-#line 1950 "mrbgems/mruby-compiler/core/parse.y"
+#line 2110 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if ((yyvsp[-2].nd)) {
                         (yyval.nd) = new_rescue(p, (yyvsp[-3].nd), (yyvsp[-2].nd), (yyvsp[-1].nd));
@@ -7067,89 +7227,89 @@ yyreduce:
                         }
                       }
                     }
-#line 7071 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7231 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 13: /* compstmt: stmts opt_terms  */
-#line 1973 "mrbgems/mruby-compiler/core/parse.y"
+#line 2133 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 7079 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7239 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 14: /* stmts: none  */
-#line 1979 "mrbgems/mruby-compiler/core/parse.y"
+#line 2139 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_stmts(p, 0);
                     }
-#line 7087 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7247 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 15: /* stmts: stmt  */
-#line 1983 "mrbgems/mruby-compiler/core/parse.y"
+#line 2143 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_stmts(p, (yyvsp[0].nd));
                     }
-#line 7095 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7255 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 16: /* stmts: stmts terms stmt  */
-#line 1987 "mrbgems/mruby-compiler/core/parse.y"
+#line 2147 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-2].nd), newline_node((yyvsp[0].nd)));
                     }
-#line 7103 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7263 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 17: /* stmts: error stmt  */
-#line 1991 "mrbgems/mruby-compiler/core/parse.y"
+#line 2151 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_stmts(p, (yyvsp[0].nd));
                     }
-#line 7111 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7271 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 18: /* $@3: %empty  */
-#line 1996 "mrbgems/mruby-compiler/core/parse.y"
+#line 2156 "mrbgems/mruby-compiler/core/parse.y"
                                      {p->lstate = EXPR_FNAME;}
-#line 7117 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7277 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 19: /* stmt: "'alias'" fsym $@3 fsym  */
-#line 1997 "mrbgems/mruby-compiler/core/parse.y"
+#line 2157 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_alias(p, (yyvsp[-2].id), (yyvsp[0].id));
                     }
-#line 7125 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7285 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 20: /* stmt: "'undef'" undef_list  */
-#line 2001 "mrbgems/mruby-compiler/core/parse.y"
+#line 2161 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 7133 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7293 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 21: /* stmt: stmt "'if' modifier" expr_value  */
-#line 2005 "mrbgems/mruby-compiler/core/parse.y"
+#line 2165 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_if(p, cond((yyvsp[0].nd)), (yyvsp[-2].nd), 0);
                     }
-#line 7141 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7301 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 22: /* stmt: stmt "'unless' modifier" expr_value  */
-#line 2009 "mrbgems/mruby-compiler/core/parse.y"
+#line 2169 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_unless(p, cond((yyvsp[0].nd)), (yyvsp[-2].nd), 0);
                     }
-#line 7149 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7309 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 23: /* stmt: stmt "'while' modifier" expr_value  */
-#line 2013 "mrbgems/mruby-compiler/core/parse.y"
+#line 2173 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if ((yyvsp[-2].nd) && node_to_type((yyvsp[-2].nd)->car) == NODE_BEGIN) {
                         (yyval.nd) = new_while_mod(p, cond((yyvsp[0].nd)), (yyvsp[-2].nd));
@@ -7158,11 +7318,11 @@ yyreduce:
                         (yyval.nd) = new_while(p, cond((yyvsp[0].nd)), (yyvsp[-2].nd));
                       }
                     }
-#line 7162 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7322 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 24: /* stmt: stmt "'until' modifier" expr_value  */
-#line 2022 "mrbgems/mruby-compiler/core/parse.y"
+#line 2182 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if ((yyvsp[-2].nd) && node_to_type((yyvsp[-2].nd)->car) == NODE_BEGIN) {
                         (yyval.nd) = new_until_mod(p, cond((yyvsp[0].nd)), (yyvsp[-2].nd));
@@ -7171,127 +7331,127 @@ yyreduce:
                         (yyval.nd) = new_until(p, cond((yyvsp[0].nd)), (yyvsp[-2].nd));
                       }
                     }
-#line 7175 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7335 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 25: /* stmt: stmt "'rescue' modifier" stmt  */
-#line 2031 "mrbgems/mruby-compiler/core/parse.y"
+#line 2191 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_mod_rescue(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 7183 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7343 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 26: /* stmt: "'END'" '{' compstmt '}'  */
-#line 2035 "mrbgems/mruby-compiler/core/parse.y"
+#line 2195 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[-3]), p, "END not supported");
                       (yyval.nd) = new_postexe(p, (yyvsp[-1].nd));
                     }
-#line 7192 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7352 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 28: /* stmt: mlhs '=' command_call  */
-#line 2041 "mrbgems/mruby-compiler/core/parse.y"
+#line 2201 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_masgn(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 7200 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7360 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 29: /* stmt: lhs '=' mrhs  */
-#line 2045 "mrbgems/mruby-compiler/core/parse.y"
+#line 2205 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_asgn(p, (yyvsp[-2].nd), new_array(p, (yyvsp[0].nd)));
                     }
-#line 7208 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7368 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 30: /* stmt: mlhs '=' arg  */
-#line 2049 "mrbgems/mruby-compiler/core/parse.y"
+#line 2209 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_masgn(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 7216 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7376 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 31: /* stmt: mlhs '=' mrhs  */
-#line 2053 "mrbgems/mruby-compiler/core/parse.y"
+#line 2213 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_masgn(p, (yyvsp[-2].nd), new_array(p, (yyvsp[0].nd)));
                     }
-#line 7224 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7384 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 32: /* stmt: arg "=>" "local variable or method"  */
-#line 2057 "mrbgems/mruby-compiler/core/parse.y"
+#line 2217 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       node *lhs = new_lvar(p, (yyvsp[0].id));
                       assignable(p, lhs);
                       (yyval.nd) = new_asgn(p, lhs, (yyvsp[-2].nd));
                     }
-#line 7234 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7394 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 34: /* command_asgn: lhs '=' command_rhs  */
-#line 2066 "mrbgems/mruby-compiler/core/parse.y"
+#line 2226 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_asgn(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 7242 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7402 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 35: /* command_asgn: var_lhs tOP_ASGN command_rhs  */
-#line 2070 "mrbgems/mruby-compiler/core/parse.y"
+#line 2230 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_op_asgn(p, (yyvsp[-2].nd), (yyvsp[-1].id), (yyvsp[0].nd));
                     }
-#line 7250 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7410 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 36: /* command_asgn: primary_value '[' opt_call_args ']' tOP_ASGN command_rhs  */
-#line 2074 "mrbgems/mruby-compiler/core/parse.y"
+#line 2234 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_op_asgn(p, new_call(p, (yyvsp[-5].nd), intern_op(aref), (yyvsp[-3].nd), '.'), (yyvsp[-1].id), (yyvsp[0].nd));
                     }
-#line 7258 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7418 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 37: /* command_asgn: primary_value call_op "local variable or method" tOP_ASGN command_rhs  */
-#line 2078 "mrbgems/mruby-compiler/core/parse.y"
+#line 2238 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_op_asgn(p, new_call(p, (yyvsp[-4].nd), (yyvsp[-2].id), 0, (yyvsp[-3].num)), (yyvsp[-1].id), (yyvsp[0].nd));
                     }
-#line 7266 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7426 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 38: /* command_asgn: primary_value call_op "constant" tOP_ASGN command_rhs  */
-#line 2082 "mrbgems/mruby-compiler/core/parse.y"
+#line 2242 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_op_asgn(p, new_call(p, (yyvsp[-4].nd), (yyvsp[-2].id), 0, (yyvsp[-3].num)), (yyvsp[-1].id), (yyvsp[0].nd));
                     }
-#line 7274 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7434 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 39: /* command_asgn: primary_value "::" "constant" tOP_ASGN command_call  */
-#line 2086 "mrbgems/mruby-compiler/core/parse.y"
+#line 2246 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[-4]), p, "constant re-assignment");
                       (yyval.nd) = 0;
                     }
-#line 7283 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7443 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 40: /* command_asgn: primary_value "::" "local variable or method" tOP_ASGN command_rhs  */
-#line 2091 "mrbgems/mruby-compiler/core/parse.y"
+#line 2251 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_op_asgn(p, new_call(p, (yyvsp[-4].nd), (yyvsp[-2].id), 0, tCOLON2), (yyvsp[-1].id), (yyvsp[0].nd));
                     }
-#line 7291 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7451 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 41: /* command_asgn: defn_head f_opt_arglist_paren '=' command  */
-#line 2095 "mrbgems/mruby-compiler/core/parse.y"
+#line 2255 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-3].nd);
                       endless_method_name(p, (yyvsp[-3].nd));
@@ -7300,11 +7460,11 @@ yyreduce:
                       nvars_unnest(p);
                       p->in_def--;
                     }
-#line 7304 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7464 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 42: /* command_asgn: defn_head f_opt_arglist_paren '=' command "'rescue' modifier" arg  */
-#line 2104 "mrbgems/mruby-compiler/core/parse.y"
+#line 2264 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-5].nd);
                       endless_method_name(p, (yyvsp[-5].nd));
@@ -7313,11 +7473,11 @@ yyreduce:
                       nvars_unnest(p);
                       p->in_def--;
                     }
-#line 7317 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7477 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 43: /* command_asgn: defs_head f_opt_arglist_paren '=' command  */
-#line 2113 "mrbgems/mruby-compiler/core/parse.y"
+#line 2273 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-3].nd);
                       void_expr_error(p, (yyvsp[0].nd));
@@ -7326,11 +7486,11 @@ yyreduce:
                       p->in_def--;
                       p->in_single--;
                     }
-#line 7330 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7490 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 44: /* command_asgn: defs_head f_opt_arglist_paren '=' command "'rescue' modifier" arg  */
-#line 2122 "mrbgems/mruby-compiler/core/parse.y"
+#line 2282 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-5].nd);
                       void_expr_error(p, (yyvsp[-2].nd));
@@ -7339,79 +7499,79 @@ yyreduce:
                       p->in_def--;
                       p->in_single--;
                     }
-#line 7343 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7503 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 45: /* command_asgn: backref tOP_ASGN command_rhs  */
-#line 2131 "mrbgems/mruby-compiler/core/parse.y"
+#line 2291 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       backref_error(p, (yyvsp[-2].nd));
                       (yyval.nd) = new_stmts(p, 0);
                     }
-#line 7352 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7512 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 47: /* command_rhs: command_call "'rescue' modifier" stmt  */
-#line 2139 "mrbgems/mruby-compiler/core/parse.y"
+#line 2299 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_mod_rescue(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 7360 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7520 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 50: /* expr: expr "'and'" expr  */
-#line 2148 "mrbgems/mruby-compiler/core/parse.y"
+#line 2308 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_and(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 7368 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7528 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 51: /* expr: expr "'or'" expr  */
-#line 2152 "mrbgems/mruby-compiler/core/parse.y"
+#line 2312 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_or(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 7376 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7536 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 52: /* expr: "'not'" opt_nl expr  */
-#line 2156 "mrbgems/mruby-compiler/core/parse.y"
+#line 2316 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_uni_op(p, cond((yyvsp[0].nd)), "!");
                     }
-#line 7384 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7544 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 53: /* expr: '!' command_call  */
-#line 2160 "mrbgems/mruby-compiler/core/parse.y"
+#line 2320 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_uni_op(p, cond((yyvsp[0].nd)), "!");
                     }
-#line 7392 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7552 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 55: /* defn_head: "'def'" fname  */
-#line 2168 "mrbgems/mruby-compiler/core/parse.y"
+#line 2328 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_def(p, (yyvsp[0].id), int_to_node(p->cmdarg_stack), local_switch(p));
                       p->cmdarg_stack = 0;
                       p->in_def++;
                       nvars_block(p);
                     }
-#line 7403 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7563 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 56: /* $@4: %empty  */
-#line 2177 "mrbgems/mruby-compiler/core/parse.y"
+#line 2337 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->lstate = EXPR_FNAME;
                     }
-#line 7411 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7571 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 57: /* defs_head: "'def'" singleton dot_or_colon $@4 fname  */
-#line 2181 "mrbgems/mruby-compiler/core/parse.y"
+#line 2341 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_sdef(p, (yyvsp[-3].nd), (yyvsp[0].id), int_to_node(p->cmdarg_stack), local_switch(p));
                       p->cmdarg_stack = 0;
@@ -7420,1054 +7580,1054 @@ yyreduce:
                       nvars_block(p);
                       p->lstate = EXPR_ENDFN; /* force for args */
                     }
-#line 7424 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7584 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 58: /* expr_value: expr  */
-#line 2192 "mrbgems/mruby-compiler/core/parse.y"
+#line 2352 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if (!(yyvsp[0].nd)) (yyval.nd) = new_nil(p);
                       else {
                         (yyval.nd) = (yyvsp[0].nd);
                       }
                     }
-#line 7435 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7595 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 62: /* block_command: block_call call_op2 operation2 command_args  */
-#line 2206 "mrbgems/mruby-compiler/core/parse.y"
+#line 2366 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), (yyvsp[-1].id), (yyvsp[0].nd), (yyvsp[-2].num));
                     }
-#line 7443 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7603 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 63: /* $@5: %empty  */
-#line 2212 "mrbgems/mruby-compiler/core/parse.y"
+#line 2372 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_nest(p);
                       nvars_nest(p);
                     }
-#line 7452 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7612 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 64: /* cmd_brace_block: "{" $@5 opt_block_param compstmt '}'  */
-#line 2219 "mrbgems/mruby-compiler/core/parse.y"
+#line 2379 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_block(p, (yyvsp[-2].nd), (yyvsp[-1].nd));
                       local_unnest(p);
                       nvars_unnest(p);
                     }
-#line 7462 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7622 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 65: /* command: operation command_args  */
-#line 2227 "mrbgems/mruby-compiler/core/parse.y"
+#line 2387 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_fcall(p, (yyvsp[-1].id), (yyvsp[0].nd));
                     }
-#line 7470 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7630 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 66: /* command: operation command_args cmd_brace_block  */
-#line 2231 "mrbgems/mruby-compiler/core/parse.y"
+#line 2391 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       args_with_block(p, (yyvsp[-1].nd), (yyvsp[0].nd));
                       (yyval.nd) = new_fcall(p, (yyvsp[-2].id), (yyvsp[-1].nd));
                     }
-#line 7479 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7639 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 67: /* command: primary_value call_op operation2 command_args  */
-#line 2236 "mrbgems/mruby-compiler/core/parse.y"
+#line 2396 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), (yyvsp[-1].id), (yyvsp[0].nd), (yyvsp[-2].num));
                     }
-#line 7487 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7647 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 68: /* command: primary_value call_op operation2 command_args cmd_brace_block  */
-#line 2240 "mrbgems/mruby-compiler/core/parse.y"
+#line 2400 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       args_with_block(p, (yyvsp[-1].nd), (yyvsp[0].nd));
                       (yyval.nd) = new_call(p, (yyvsp[-4].nd), (yyvsp[-2].id), (yyvsp[-1].nd), (yyvsp[-3].num));
                    }
-#line 7496 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7656 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 69: /* command: primary_value "::" operation2 command_args  */
-#line 2245 "mrbgems/mruby-compiler/core/parse.y"
+#line 2405 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), (yyvsp[-1].id), (yyvsp[0].nd), tCOLON2);
                     }
-#line 7504 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7664 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 70: /* command: primary_value "::" operation2 command_args cmd_brace_block  */
-#line 2249 "mrbgems/mruby-compiler/core/parse.y"
+#line 2409 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       args_with_block(p, (yyvsp[-1].nd), (yyvsp[0].nd));
                       (yyval.nd) = new_call(p, (yyvsp[-4].nd), (yyvsp[-2].id), (yyvsp[-1].nd), tCOLON2);
                     }
-#line 7513 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 71: /* command: "'super'" command_args  */
-#line 2254 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_super(p, (yyvsp[0].nd));
-                    }
-#line 7521 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 72: /* command: "'yield'" command_args  */
-#line 2258 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_yield(p, (yyvsp[0].nd));
-                    }
-#line 7529 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 73: /* command: "'return'" call_args  */
-#line 2262 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_return(p, ret_args(p, (yyvsp[0].nd)));
-                    }
-#line 7537 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 74: /* command: "'break'" call_args  */
-#line 2266 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_break(p, ret_args(p, (yyvsp[0].nd)));
-                    }
-#line 7545 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 75: /* command: "'next'" call_args  */
-#line 2270 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_next(p, ret_args(p, (yyvsp[0].nd)));
-                    }
-#line 7553 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 76: /* mlhs: mlhs_basic  */
-#line 2276 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = (yyvsp[0].nd);
-                    }
-#line 7561 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 77: /* mlhs: tLPAREN mlhs_inner rparen  */
-#line 2280 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = (yyvsp[-1].nd);
-                    }
-#line 7569 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 79: /* mlhs_inner: tLPAREN mlhs_inner rparen  */
-#line 2287 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = (yyvsp[-1].nd);
-                    }
-#line 7577 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 80: /* mlhs_basic: mlhs_list  */
-#line 2293 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = list1((yyvsp[0].nd));
-                    }
-#line 7585 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 81: /* mlhs_basic: mlhs_list mlhs_item  */
-#line 2297 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = list1(push((yyvsp[-1].nd),(yyvsp[0].nd)));
-                    }
-#line 7593 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 82: /* mlhs_basic: mlhs_list "*" mlhs_node  */
-#line 2301 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = list2((yyvsp[-2].nd), (yyvsp[0].nd));
-                    }
-#line 7601 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 83: /* mlhs_basic: mlhs_list "*" mlhs_node ',' mlhs_post  */
-#line 2305 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = list3((yyvsp[-4].nd), (yyvsp[-2].nd), (yyvsp[0].nd));
-                    }
-#line 7609 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 84: /* mlhs_basic: mlhs_list "*"  */
-#line 2309 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = list2((yyvsp[-1].nd), new_nil(p));
-                    }
-#line 7617 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 85: /* mlhs_basic: mlhs_list "*" ',' mlhs_post  */
-#line 2313 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = list3((yyvsp[-3].nd), new_nil(p), (yyvsp[0].nd));
-                    }
-#line 7625 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 86: /* mlhs_basic: "*" mlhs_node  */
-#line 2317 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = list2(0, (yyvsp[0].nd));
-                    }
-#line 7633 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 87: /* mlhs_basic: "*" mlhs_node ',' mlhs_post  */
-#line 2321 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = list3(0, (yyvsp[-2].nd), (yyvsp[0].nd));
-                    }
-#line 7641 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 88: /* mlhs_basic: "*"  */
-#line 2325 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = list2(0, new_nil(p));
-                    }
-#line 7649 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 89: /* mlhs_basic: "*" ',' mlhs_post  */
-#line 2329 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = list3(0, new_nil(p), (yyvsp[0].nd));
-                    }
-#line 7657 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 91: /* mlhs_item: tLPAREN mlhs_inner rparen  */
-#line 2336 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_masgn(p, (yyvsp[-1].nd), NULL);
-                    }
-#line 7665 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 92: /* mlhs_list: mlhs_item ','  */
-#line 2342 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = list1((yyvsp[-1].nd));
-                    }
 #line 7673 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 93: /* mlhs_list: mlhs_list mlhs_item ','  */
-#line 2346 "mrbgems/mruby-compiler/core/parse.y"
+  case 71: /* command: "'super'" command_args  */
+#line 2414 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[-1].nd));
+                      (yyval.nd) = new_super(p, (yyvsp[0].nd));
                     }
 #line 7681 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 94: /* mlhs_post: mlhs_item  */
-#line 2352 "mrbgems/mruby-compiler/core/parse.y"
+  case 72: /* command: "'yield'" command_args  */
+#line 2418 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = list1((yyvsp[0].nd));
+                      (yyval.nd) = new_yield(p, (yyvsp[0].nd));
                     }
 #line 7689 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 95: /* mlhs_post: mlhs_list mlhs_item  */
-#line 2356 "mrbgems/mruby-compiler/core/parse.y"
+  case 73: /* command: "'return'" call_args  */
+#line 2422 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = push((yyvsp[-1].nd), (yyvsp[0].nd));
+                      (yyval.nd) = new_return(p, ret_args(p, (yyvsp[0].nd)));
                     }
 #line 7697 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 96: /* mlhs_node: variable  */
-#line 2362 "mrbgems/mruby-compiler/core/parse.y"
+  case 74: /* command: "'break'" call_args  */
+#line 2426 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      assignable(p, (yyvsp[0].nd));
+                      (yyval.nd) = new_break(p, ret_args(p, (yyvsp[0].nd)));
                     }
 #line 7705 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 97: /* mlhs_node: primary_value '[' opt_call_args ']'  */
-#line 2366 "mrbgems/mruby-compiler/core/parse.y"
+  case 75: /* command: "'next'" call_args  */
+#line 2430 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = new_call(p, (yyvsp[-3].nd), intern_op(aref), (yyvsp[-1].nd), '.');
+                      (yyval.nd) = new_next(p, ret_args(p, (yyvsp[0].nd)));
                     }
 #line 7713 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 98: /* mlhs_node: primary_value call_op "local variable or method"  */
-#line 2370 "mrbgems/mruby-compiler/core/parse.y"
+  case 76: /* mlhs: mlhs_basic  */
+#line 2436 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = new_call(p, (yyvsp[-2].nd), (yyvsp[0].id), 0, (yyvsp[-1].num));
+                      (yyval.nd) = (yyvsp[0].nd);
                     }
 #line 7721 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 99: /* mlhs_node: primary_value "::" "local variable or method"  */
-#line 2374 "mrbgems/mruby-compiler/core/parse.y"
+  case 77: /* mlhs: tLPAREN mlhs_inner rparen  */
+#line 2440 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = new_call(p, (yyvsp[-2].nd), (yyvsp[0].id), 0, tCOLON2);
+                      (yyval.nd) = (yyvsp[-1].nd);
                     }
 #line 7729 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 100: /* mlhs_node: primary_value call_op "constant"  */
-#line 2378 "mrbgems/mruby-compiler/core/parse.y"
+  case 79: /* mlhs_inner: tLPAREN mlhs_inner rparen  */
+#line 2447 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = new_call(p, (yyvsp[-2].nd), (yyvsp[0].id), 0, (yyvsp[-1].num));
+                      (yyval.nd) = (yyvsp[-1].nd);
                     }
 #line 7737 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 101: /* mlhs_node: primary_value "::" "constant"  */
-#line 2382 "mrbgems/mruby-compiler/core/parse.y"
+  case 80: /* mlhs_basic: mlhs_list  */
+#line 2453 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      if (p->in_def || p->in_single)
-                        yyerror(&(yylsp[-2]), p, "dynamic constant assignment");
-                      (yyval.nd) = new_colon2(p, (yyvsp[-2].nd), (yyvsp[0].id));
+                      (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 7747 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7745 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 102: /* mlhs_node: tCOLON3 "constant"  */
-#line 2388 "mrbgems/mruby-compiler/core/parse.y"
+  case 81: /* mlhs_basic: mlhs_list mlhs_item  */
+#line 2457 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      if (p->in_def || p->in_single)
-                        yyerror(&(yylsp[-1]), p, "dynamic constant assignment");
-                      (yyval.nd) = new_colon3(p, (yyvsp[0].id));
+                      (yyval.nd) = list1(push((yyvsp[-1].nd),(yyvsp[0].nd)));
                     }
-#line 7757 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7753 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 103: /* mlhs_node: backref  */
-#line 2394 "mrbgems/mruby-compiler/core/parse.y"
+  case 82: /* mlhs_basic: mlhs_list "*" mlhs_node  */
+#line 2461 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      backref_error(p, (yyvsp[0].nd));
-                      (yyval.nd) = 0;
+                      (yyval.nd) = list2((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 7766 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7761 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 104: /* lhs: variable  */
-#line 2401 "mrbgems/mruby-compiler/core/parse.y"
+  case 83: /* mlhs_basic: mlhs_list "*" mlhs_node ',' mlhs_post  */
+#line 2465 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = list3((yyvsp[-4].nd), (yyvsp[-2].nd), (yyvsp[0].nd));
+                    }
+#line 7769 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 84: /* mlhs_basic: mlhs_list "*"  */
+#line 2469 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = list2((yyvsp[-1].nd), new_nil(p));
+                    }
+#line 7777 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 85: /* mlhs_basic: mlhs_list "*" ',' mlhs_post  */
+#line 2473 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = list3((yyvsp[-3].nd), new_nil(p), (yyvsp[0].nd));
+                    }
+#line 7785 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 86: /* mlhs_basic: "*" mlhs_node  */
+#line 2477 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = list2(0, (yyvsp[0].nd));
+                    }
+#line 7793 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 87: /* mlhs_basic: "*" mlhs_node ',' mlhs_post  */
+#line 2481 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = list3(0, (yyvsp[-2].nd), (yyvsp[0].nd));
+                    }
+#line 7801 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 88: /* mlhs_basic: "*"  */
+#line 2485 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = list2(0, new_nil(p));
+                    }
+#line 7809 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 89: /* mlhs_basic: "*" ',' mlhs_post  */
+#line 2489 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = list3(0, new_nil(p), (yyvsp[0].nd));
+                    }
+#line 7817 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 91: /* mlhs_item: tLPAREN mlhs_inner rparen  */
+#line 2496 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_masgn(p, (yyvsp[-1].nd), NULL);
+                    }
+#line 7825 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 92: /* mlhs_list: mlhs_item ','  */
+#line 2502 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = list1((yyvsp[-1].nd));
+                    }
+#line 7833 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 93: /* mlhs_list: mlhs_list mlhs_item ','  */
+#line 2506 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[-1].nd));
+                    }
+#line 7841 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 94: /* mlhs_post: mlhs_item  */
+#line 2512 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = list1((yyvsp[0].nd));
+                    }
+#line 7849 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 95: /* mlhs_post: mlhs_list mlhs_item  */
+#line 2516 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = push((yyvsp[-1].nd), (yyvsp[0].nd));
+                    }
+#line 7857 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 96: /* mlhs_node: variable  */
+#line 2522 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       assignable(p, (yyvsp[0].nd));
                     }
-#line 7774 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7865 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 105: /* lhs: primary_value '[' opt_call_args ']'  */
-#line 2405 "mrbgems/mruby-compiler/core/parse.y"
+  case 97: /* mlhs_node: primary_value '[' opt_call_args ']'  */
+#line 2526 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), intern_op(aref), (yyvsp[-1].nd), '.');
                     }
-#line 7782 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7873 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 106: /* lhs: primary_value call_op "local variable or method"  */
-#line 2409 "mrbgems/mruby-compiler/core/parse.y"
+  case 98: /* mlhs_node: primary_value call_op "local variable or method"  */
+#line 2530 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-2].nd), (yyvsp[0].id), 0, (yyvsp[-1].num));
                     }
-#line 7790 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7881 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 107: /* lhs: primary_value "::" "local variable or method"  */
-#line 2413 "mrbgems/mruby-compiler/core/parse.y"
+  case 99: /* mlhs_node: primary_value "::" "local variable or method"  */
+#line 2534 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-2].nd), (yyvsp[0].id), 0, tCOLON2);
                     }
-#line 7798 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7889 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 108: /* lhs: primary_value call_op "constant"  */
-#line 2417 "mrbgems/mruby-compiler/core/parse.y"
+  case 100: /* mlhs_node: primary_value call_op "constant"  */
+#line 2538 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-2].nd), (yyvsp[0].id), 0, (yyvsp[-1].num));
                     }
-#line 7806 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7897 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 109: /* lhs: primary_value "::" "constant"  */
-#line 2421 "mrbgems/mruby-compiler/core/parse.y"
+  case 101: /* mlhs_node: primary_value "::" "constant"  */
+#line 2542 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if (p->in_def || p->in_single)
                         yyerror(&(yylsp[-2]), p, "dynamic constant assignment");
                       (yyval.nd) = new_colon2(p, (yyvsp[-2].nd), (yyvsp[0].id));
                     }
-#line 7816 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7907 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 110: /* lhs: tCOLON3 "constant"  */
-#line 2427 "mrbgems/mruby-compiler/core/parse.y"
+  case 102: /* mlhs_node: tCOLON3 "constant"  */
+#line 2548 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if (p->in_def || p->in_single)
                         yyerror(&(yylsp[-1]), p, "dynamic constant assignment");
                       (yyval.nd) = new_colon3(p, (yyvsp[0].id));
                     }
-#line 7826 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7917 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 111: /* lhs: backref  */
-#line 2433 "mrbgems/mruby-compiler/core/parse.y"
+  case 103: /* mlhs_node: backref  */
+#line 2554 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       backref_error(p, (yyvsp[0].nd));
                       (yyval.nd) = 0;
                     }
-#line 7835 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7926 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 104: /* lhs: variable  */
+#line 2561 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      assignable(p, (yyvsp[0].nd));
+                    }
+#line 7934 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 105: /* lhs: primary_value '[' opt_call_args ']'  */
+#line 2565 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_call(p, (yyvsp[-3].nd), intern_op(aref), (yyvsp[-1].nd), '.');
+                    }
+#line 7942 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 106: /* lhs: primary_value call_op "local variable or method"  */
+#line 2569 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_call(p, (yyvsp[-2].nd), (yyvsp[0].id), 0, (yyvsp[-1].num));
+                    }
+#line 7950 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 107: /* lhs: primary_value "::" "local variable or method"  */
+#line 2573 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_call(p, (yyvsp[-2].nd), (yyvsp[0].id), 0, tCOLON2);
+                    }
+#line 7958 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 108: /* lhs: primary_value call_op "constant"  */
+#line 2577 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_call(p, (yyvsp[-2].nd), (yyvsp[0].id), 0, (yyvsp[-1].num));
+                    }
+#line 7966 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 109: /* lhs: primary_value "::" "constant"  */
+#line 2581 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      if (p->in_def || p->in_single)
+                        yyerror(&(yylsp[-2]), p, "dynamic constant assignment");
+                      (yyval.nd) = new_colon2(p, (yyvsp[-2].nd), (yyvsp[0].id));
+                    }
+#line 7976 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 110: /* lhs: tCOLON3 "constant"  */
+#line 2587 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      if (p->in_def || p->in_single)
+                        yyerror(&(yylsp[-1]), p, "dynamic constant assignment");
+                      (yyval.nd) = new_colon3(p, (yyvsp[0].id));
+                    }
+#line 7986 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 111: /* lhs: backref  */
+#line 2593 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      backref_error(p, (yyvsp[0].nd));
+                      (yyval.nd) = 0;
+                    }
+#line 7995 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 112: /* lhs: "numbered parameter"  */
-#line 2438 "mrbgems/mruby-compiler/core/parse.y"
+#line 2598 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[0]), p, "can't assign to numbered parameter");
                     }
-#line 7843 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8003 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 113: /* cname: "local variable or method"  */
-#line 2444 "mrbgems/mruby-compiler/core/parse.y"
+#line 2604 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[0]), p, "class/module name must be CONSTANT");
                     }
-#line 7851 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8011 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 115: /* cpath: tCOLON3 cname  */
-#line 2451 "mrbgems/mruby-compiler/core/parse.y"
+#line 2611 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = cons(int_to_node(1), sym_to_node((yyvsp[0].id)));
                     }
-#line 7859 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8019 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 116: /* cpath: cname  */
-#line 2455 "mrbgems/mruby-compiler/core/parse.y"
+#line 2615 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = cons(int_to_node(0), sym_to_node((yyvsp[0].id)));
                     }
-#line 7867 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8027 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 117: /* cpath: primary_value "::" cname  */
-#line 2459 "mrbgems/mruby-compiler/core/parse.y"
+#line 2619 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       void_expr_error(p, (yyvsp[-2].nd));
                       (yyval.nd) = cons((yyvsp[-2].nd), sym_to_node((yyvsp[0].id)));
                     }
-#line 7876 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 121: /* fname: op  */
-#line 2469 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      p->lstate = EXPR_ENDFN;
-                      (yyval.id) = (yyvsp[0].id);
-                    }
-#line 7885 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 122: /* fname: reswords  */
-#line 2474 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      p->lstate = EXPR_ENDFN;
-                      (yyval.id) = (yyvsp[0].id);
-                    }
-#line 7894 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 125: /* undef_list: fsym  */
-#line 2485 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_undef(p, (yyvsp[0].id));
-                    }
-#line 7902 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 126: /* $@6: %empty  */
-#line 2488 "mrbgems/mruby-compiler/core/parse.y"
-                                 {p->lstate = EXPR_FNAME;}
-#line 7908 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 127: /* undef_list: undef_list ',' $@6 fsym  */
-#line 2489 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = push((yyvsp[-3].nd), sym_to_node((yyvsp[0].id)));
-                    }
-#line 7916 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 128: /* op: '|'  */
-#line 2494 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(or);     }
-#line 7922 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 129: /* op: '^'  */
-#line 2495 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(xor);    }
-#line 7928 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 130: /* op: '&'  */
-#line 2496 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(and);    }
-#line 7934 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 131: /* op: "<=>"  */
-#line 2497 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(cmp);    }
-#line 7940 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 132: /* op: "=="  */
-#line 2498 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(eq);     }
-#line 7946 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 133: /* op: "==="  */
-#line 2499 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(eqq);    }
-#line 7952 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 134: /* op: "=~"  */
-#line 2500 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(match);  }
-#line 7958 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 135: /* op: "!~"  */
-#line 2501 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(nmatch); }
-#line 7964 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 136: /* op: '>'  */
-#line 2502 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(gt);     }
-#line 7970 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 137: /* op: ">="  */
-#line 2503 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(ge);     }
-#line 7976 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 138: /* op: '<'  */
-#line 2504 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(lt);     }
-#line 7982 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 139: /* op: "<="  */
-#line 2505 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(le);     }
-#line 7988 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 140: /* op: "!="  */
-#line 2506 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(neq);    }
-#line 7994 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 141: /* op: "<<"  */
-#line 2507 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(lshift); }
-#line 8000 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 142: /* op: ">>"  */
-#line 2508 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(rshift); }
-#line 8006 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 143: /* op: '+'  */
-#line 2509 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(add);    }
-#line 8012 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 144: /* op: '-'  */
-#line 2510 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(sub);    }
-#line 8018 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 145: /* op: '*'  */
-#line 2511 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(mul);    }
-#line 8024 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 146: /* op: "*"  */
-#line 2512 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(mul);    }
-#line 8030 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 147: /* op: '/'  */
-#line 2513 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(div);    }
 #line 8036 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 148: /* op: '%'  */
-#line 2514 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(mod);    }
-#line 8042 "mrbgems/mruby-compiler/core/y.tab.c"
+  case 121: /* fname: op  */
+#line 2629 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      p->lstate = EXPR_ENDFN;
+                      (yyval.id) = (yyvsp[0].id);
+                    }
+#line 8045 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 149: /* op: tPOW  */
-#line 2515 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(pow);    }
-#line 8048 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 150: /* op: "**"  */
-#line 2516 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(pow);    }
+  case 122: /* fname: reswords  */
+#line 2634 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      p->lstate = EXPR_ENDFN;
+                      (yyval.id) = (yyvsp[0].id);
+                    }
 #line 8054 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 151: /* op: '!'  */
-#line 2517 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(not);    }
-#line 8060 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 152: /* op: '~'  */
-#line 2518 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(neg);    }
-#line 8066 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 153: /* op: "unary plus"  */
-#line 2519 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(plus);   }
-#line 8072 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 154: /* op: "unary minus"  */
-#line 2520 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(minus);  }
-#line 8078 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 155: /* op: tAREF  */
-#line 2521 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(aref);   }
-#line 8084 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 156: /* op: tASET  */
-#line 2522 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(aset);   }
-#line 8090 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 157: /* op: '`'  */
-#line 2523 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(tick);   }
-#line 8096 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 198: /* arg: lhs '=' arg_rhs  */
-#line 2541 "mrbgems/mruby-compiler/core/parse.y"
+  case 125: /* undef_list: fsym  */
+#line 2645 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = new_asgn(p, (yyvsp[-2].nd), (yyvsp[0].nd));
+                      (yyval.nd) = new_undef(p, (yyvsp[0].id));
                     }
-#line 8104 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8062 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 199: /* arg: var_lhs tOP_ASGN arg_rhs  */
-#line 2545 "mrbgems/mruby-compiler/core/parse.y"
+  case 126: /* $@6: %empty  */
+#line 2648 "mrbgems/mruby-compiler/core/parse.y"
+                                 {p->lstate = EXPR_FNAME;}
+#line 8068 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 127: /* undef_list: undef_list ',' $@6 fsym  */
+#line 2649 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = new_op_asgn(p, (yyvsp[-2].nd), (yyvsp[-1].id), (yyvsp[0].nd));
+                      (yyval.nd) = push((yyvsp[-3].nd), sym_to_node((yyvsp[0].id)));
                     }
+#line 8076 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 128: /* op: '|'  */
+#line 2654 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(or);     }
+#line 8082 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 129: /* op: '^'  */
+#line 2655 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(xor);    }
+#line 8088 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 130: /* op: '&'  */
+#line 2656 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(and);    }
+#line 8094 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 131: /* op: "<=>"  */
+#line 2657 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(cmp);    }
+#line 8100 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 132: /* op: "=="  */
+#line 2658 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(eq);     }
+#line 8106 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 133: /* op: "==="  */
+#line 2659 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(eqq);    }
 #line 8112 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 200: /* arg: primary_value '[' opt_call_args ']' tOP_ASGN arg_rhs  */
-#line 2549 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_op_asgn(p, new_call(p, (yyvsp[-5].nd), intern_op(aref), (yyvsp[-3].nd), '.'), (yyvsp[-1].id), (yyvsp[0].nd));
-                    }
-#line 8120 "mrbgems/mruby-compiler/core/y.tab.c"
+  case 134: /* op: "=~"  */
+#line 2660 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(match);  }
+#line 8118 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 201: /* arg: primary_value call_op "local variable or method" tOP_ASGN arg_rhs  */
-#line 2553 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_op_asgn(p, new_call(p, (yyvsp[-4].nd), (yyvsp[-2].id), 0, (yyvsp[-3].num)), (yyvsp[-1].id), (yyvsp[0].nd));
-                    }
-#line 8128 "mrbgems/mruby-compiler/core/y.tab.c"
+  case 135: /* op: "!~"  */
+#line 2661 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(nmatch); }
+#line 8124 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 202: /* arg: primary_value call_op "constant" tOP_ASGN arg_rhs  */
-#line 2557 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_op_asgn(p, new_call(p, (yyvsp[-4].nd), (yyvsp[-2].id), 0, (yyvsp[-3].num)), (yyvsp[-1].id), (yyvsp[0].nd));
-                    }
+  case 136: /* op: '>'  */
+#line 2662 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(gt);     }
+#line 8130 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 137: /* op: ">="  */
+#line 2663 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(ge);     }
 #line 8136 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
+  case 138: /* op: '<'  */
+#line 2664 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(lt);     }
+#line 8142 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 139: /* op: "<="  */
+#line 2665 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(le);     }
+#line 8148 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 140: /* op: "!="  */
+#line 2666 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(neq);    }
+#line 8154 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 141: /* op: "<<"  */
+#line 2667 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(lshift); }
+#line 8160 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 142: /* op: ">>"  */
+#line 2668 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(rshift); }
+#line 8166 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 143: /* op: '+'  */
+#line 2669 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(add);    }
+#line 8172 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 144: /* op: '-'  */
+#line 2670 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(sub);    }
+#line 8178 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 145: /* op: '*'  */
+#line 2671 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(mul);    }
+#line 8184 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 146: /* op: "*"  */
+#line 2672 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(mul);    }
+#line 8190 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 147: /* op: '/'  */
+#line 2673 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(div);    }
+#line 8196 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 148: /* op: '%'  */
+#line 2674 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(mod);    }
+#line 8202 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 149: /* op: tPOW  */
+#line 2675 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(pow);    }
+#line 8208 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 150: /* op: "**"  */
+#line 2676 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(pow);    }
+#line 8214 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 151: /* op: '!'  */
+#line 2677 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(not);    }
+#line 8220 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 152: /* op: '~'  */
+#line 2678 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(neg);    }
+#line 8226 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 153: /* op: "unary plus"  */
+#line 2679 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(plus);   }
+#line 8232 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 154: /* op: "unary minus"  */
+#line 2680 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(minus);  }
+#line 8238 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 155: /* op: tAREF  */
+#line 2681 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(aref);   }
+#line 8244 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 156: /* op: tASET  */
+#line 2682 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(aset);   }
+#line 8250 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 157: /* op: '`'  */
+#line 2683 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(tick);   }
+#line 8256 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 198: /* arg: lhs '=' arg_rhs  */
+#line 2701 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_asgn(p, (yyvsp[-2].nd), (yyvsp[0].nd));
+                    }
+#line 8264 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 199: /* arg: var_lhs tOP_ASGN arg_rhs  */
+#line 2705 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_op_asgn(p, (yyvsp[-2].nd), (yyvsp[-1].id), (yyvsp[0].nd));
+                    }
+#line 8272 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 200: /* arg: primary_value '[' opt_call_args ']' tOP_ASGN arg_rhs  */
+#line 2709 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_op_asgn(p, new_call(p, (yyvsp[-5].nd), intern_op(aref), (yyvsp[-3].nd), '.'), (yyvsp[-1].id), (yyvsp[0].nd));
+                    }
+#line 8280 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 201: /* arg: primary_value call_op "local variable or method" tOP_ASGN arg_rhs  */
+#line 2713 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_op_asgn(p, new_call(p, (yyvsp[-4].nd), (yyvsp[-2].id), 0, (yyvsp[-3].num)), (yyvsp[-1].id), (yyvsp[0].nd));
+                    }
+#line 8288 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 202: /* arg: primary_value call_op "constant" tOP_ASGN arg_rhs  */
+#line 2717 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_op_asgn(p, new_call(p, (yyvsp[-4].nd), (yyvsp[-2].id), 0, (yyvsp[-3].num)), (yyvsp[-1].id), (yyvsp[0].nd));
+                    }
+#line 8296 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
   case 203: /* arg: primary_value "::" "local variable or method" tOP_ASGN arg_rhs  */
-#line 2561 "mrbgems/mruby-compiler/core/parse.y"
+#line 2721 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_op_asgn(p, new_call(p, (yyvsp[-4].nd), (yyvsp[-2].id), 0, tCOLON2), (yyvsp[-1].id), (yyvsp[0].nd));
                     }
-#line 8144 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8304 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 204: /* arg: primary_value "::" "constant" tOP_ASGN arg_rhs  */
-#line 2565 "mrbgems/mruby-compiler/core/parse.y"
+#line 2725 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[-4]), p, "constant re-assignment");
                       (yyval.nd) = new_stmts(p, 0);
                     }
-#line 8153 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8313 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 205: /* arg: tCOLON3 "constant" tOP_ASGN arg_rhs  */
-#line 2570 "mrbgems/mruby-compiler/core/parse.y"
+#line 2730 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[-3]), p, "constant re-assignment");
                       (yyval.nd) = new_stmts(p, 0);
                     }
-#line 8162 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8322 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 206: /* arg: backref tOP_ASGN arg_rhs  */
-#line 2575 "mrbgems/mruby-compiler/core/parse.y"
+#line 2735 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       backref_error(p, (yyvsp[-2].nd));
                       (yyval.nd) = new_stmts(p, 0);
                     }
-#line 8171 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 207: /* arg: arg ".." arg  */
-#line 2580 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_dot2(p, (yyvsp[-2].nd), (yyvsp[0].nd));
-                    }
-#line 8179 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 208: /* arg: arg ".."  */
-#line 2584 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_dot2(p, (yyvsp[-1].nd), new_nil(p));
-                    }
-#line 8187 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 209: /* arg: tBDOT2 arg  */
-#line 2588 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_dot2(p, new_nil(p), (yyvsp[0].nd));
-                    }
-#line 8195 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 210: /* arg: arg "..." arg  */
-#line 2592 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_dot3(p, (yyvsp[-2].nd), (yyvsp[0].nd));
-                    }
-#line 8203 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 211: /* arg: arg "..."  */
-#line 2596 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_dot3(p, (yyvsp[-1].nd), new_nil(p));
-                    }
-#line 8211 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 212: /* arg: tBDOT3 arg  */
-#line 2600 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_dot3(p, new_nil(p), (yyvsp[0].nd));
-                    }
-#line 8219 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 213: /* arg: arg '+' arg  */
-#line 2604 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "+", (yyvsp[0].nd));
-                    }
-#line 8227 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 214: /* arg: arg '-' arg  */
-#line 2608 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "-", (yyvsp[0].nd));
-                    }
-#line 8235 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 215: /* arg: arg '*' arg  */
-#line 2612 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "*", (yyvsp[0].nd));
-                    }
-#line 8243 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 216: /* arg: arg '/' arg  */
-#line 2616 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "/", (yyvsp[0].nd));
-                    }
-#line 8251 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 217: /* arg: arg '%' arg  */
-#line 2620 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "%", (yyvsp[0].nd));
-                    }
-#line 8259 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 218: /* arg: arg tPOW arg  */
-#line 2624 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "**", (yyvsp[0].nd));
-                    }
-#line 8267 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 219: /* arg: tUMINUS_NUM "integer literal" tPOW arg  */
-#line 2628 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_negate(p, call_bin_op(p, (yyvsp[-2].nd), "**", (yyvsp[0].nd)));
-                    }
-#line 8275 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 220: /* arg: tUMINUS_NUM "float literal" tPOW arg  */
-#line 2632 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_negate(p, call_bin_op(p, (yyvsp[-2].nd), "**", (yyvsp[0].nd)));
-                    }
-#line 8283 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 221: /* arg: "unary plus" arg  */
-#line 2636 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = call_uni_op(p, (yyvsp[0].nd), "+@");
-                    }
-#line 8291 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 222: /* arg: "unary minus" arg  */
-#line 2640 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_negate(p, (yyvsp[0].nd));
-                    }
-#line 8299 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 223: /* arg: arg '|' arg  */
-#line 2644 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "|", (yyvsp[0].nd));
-                    }
-#line 8307 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 224: /* arg: arg '^' arg  */
-#line 2648 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "^", (yyvsp[0].nd));
-                    }
-#line 8315 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 225: /* arg: arg '&' arg  */
-#line 2652 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "&", (yyvsp[0].nd));
-                    }
-#line 8323 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 226: /* arg: arg "<=>" arg  */
-#line 2656 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "<=>", (yyvsp[0].nd));
-                    }
 #line 8331 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 227: /* arg: arg '>' arg  */
-#line 2660 "mrbgems/mruby-compiler/core/parse.y"
+  case 207: /* arg: arg ".." arg  */
+#line 2740 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), ">", (yyvsp[0].nd));
+                      (yyval.nd) = new_dot2(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
 #line 8339 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 228: /* arg: arg ">=" arg  */
-#line 2664 "mrbgems/mruby-compiler/core/parse.y"
+  case 208: /* arg: arg ".."  */
+#line 2744 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), ">=", (yyvsp[0].nd));
+                      (yyval.nd) = new_dot2(p, (yyvsp[-1].nd), new_nil(p));
                     }
 #line 8347 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 229: /* arg: arg '<' arg  */
-#line 2668 "mrbgems/mruby-compiler/core/parse.y"
+  case 209: /* arg: tBDOT2 arg  */
+#line 2748 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "<", (yyvsp[0].nd));
+                      (yyval.nd) = new_dot2(p, new_nil(p), (yyvsp[0].nd));
                     }
 #line 8355 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 230: /* arg: arg "<=" arg  */
-#line 2672 "mrbgems/mruby-compiler/core/parse.y"
+  case 210: /* arg: arg "..." arg  */
+#line 2752 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "<=", (yyvsp[0].nd));
+                      (yyval.nd) = new_dot3(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
 #line 8363 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 231: /* arg: arg "==" arg  */
-#line 2676 "mrbgems/mruby-compiler/core/parse.y"
+  case 211: /* arg: arg "..."  */
+#line 2756 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "==", (yyvsp[0].nd));
+                      (yyval.nd) = new_dot3(p, (yyvsp[-1].nd), new_nil(p));
                     }
 #line 8371 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 232: /* arg: arg "===" arg  */
-#line 2680 "mrbgems/mruby-compiler/core/parse.y"
+  case 212: /* arg: tBDOT3 arg  */
+#line 2760 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "===", (yyvsp[0].nd));
+                      (yyval.nd) = new_dot3(p, new_nil(p), (yyvsp[0].nd));
                     }
 #line 8379 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 233: /* arg: arg "!=" arg  */
-#line 2684 "mrbgems/mruby-compiler/core/parse.y"
+  case 213: /* arg: arg '+' arg  */
+#line 2764 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "!=", (yyvsp[0].nd));
+                      (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "+", (yyvsp[0].nd));
                     }
 #line 8387 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 234: /* arg: arg "=~" arg  */
-#line 2688 "mrbgems/mruby-compiler/core/parse.y"
+  case 214: /* arg: arg '-' arg  */
+#line 2768 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "=~", (yyvsp[0].nd));
+                      (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "-", (yyvsp[0].nd));
                     }
 #line 8395 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 235: /* arg: arg "!~" arg  */
-#line 2692 "mrbgems/mruby-compiler/core/parse.y"
+  case 215: /* arg: arg '*' arg  */
+#line 2772 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "!~", (yyvsp[0].nd));
+                      (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "*", (yyvsp[0].nd));
                     }
 #line 8403 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 236: /* arg: '!' arg  */
-#line 2696 "mrbgems/mruby-compiler/core/parse.y"
+  case 216: /* arg: arg '/' arg  */
+#line 2776 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = call_uni_op(p, cond((yyvsp[0].nd)), "!");
+                      (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "/", (yyvsp[0].nd));
                     }
 #line 8411 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 237: /* arg: '~' arg  */
-#line 2700 "mrbgems/mruby-compiler/core/parse.y"
+  case 217: /* arg: arg '%' arg  */
+#line 2780 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = call_uni_op(p, cond((yyvsp[0].nd)), "~");
+                      (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "%", (yyvsp[0].nd));
                     }
 #line 8419 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 238: /* arg: arg "<<" arg  */
-#line 2704 "mrbgems/mruby-compiler/core/parse.y"
+  case 218: /* arg: arg tPOW arg  */
+#line 2784 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "<<", (yyvsp[0].nd));
+                      (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "**", (yyvsp[0].nd));
                     }
 #line 8427 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 239: /* arg: arg ">>" arg  */
-#line 2708 "mrbgems/mruby-compiler/core/parse.y"
+  case 219: /* arg: tUMINUS_NUM "integer literal" tPOW arg  */
+#line 2788 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), ">>", (yyvsp[0].nd));
+                      (yyval.nd) = new_negate(p, call_bin_op(p, (yyvsp[-2].nd), "**", (yyvsp[0].nd)));
                     }
 #line 8435 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 240: /* arg: arg "&&" arg  */
-#line 2712 "mrbgems/mruby-compiler/core/parse.y"
+  case 220: /* arg: tUMINUS_NUM "float literal" tPOW arg  */
+#line 2792 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = new_and(p, (yyvsp[-2].nd), (yyvsp[0].nd));
+                      (yyval.nd) = new_negate(p, call_bin_op(p, (yyvsp[-2].nd), "**", (yyvsp[0].nd)));
                     }
 #line 8443 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 241: /* arg: arg "||" arg  */
-#line 2716 "mrbgems/mruby-compiler/core/parse.y"
+  case 221: /* arg: "unary plus" arg  */
+#line 2796 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = new_or(p, (yyvsp[-2].nd), (yyvsp[0].nd));
+                      (yyval.nd) = call_uni_op(p, (yyvsp[0].nd), "+@");
                     }
 #line 8451 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 242: /* arg: arg '?' arg opt_nl ':' arg  */
-#line 2720 "mrbgems/mruby-compiler/core/parse.y"
+  case 222: /* arg: "unary minus" arg  */
+#line 2800 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = new_if(p, cond((yyvsp[-5].nd)), (yyvsp[-3].nd), (yyvsp[0].nd));
+                      (yyval.nd) = new_negate(p, (yyvsp[0].nd));
                     }
 #line 8459 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 243: /* arg: arg '?' arg opt_nl "label" arg  */
-#line 2724 "mrbgems/mruby-compiler/core/parse.y"
+  case 223: /* arg: arg '|' arg  */
+#line 2804 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = new_if(p, cond((yyvsp[-5].nd)), (yyvsp[-3].nd), (yyvsp[0].nd));
+                      (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "|", (yyvsp[0].nd));
                     }
 #line 8467 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
+  case 224: /* arg: arg '^' arg  */
+#line 2808 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "^", (yyvsp[0].nd));
+                    }
+#line 8475 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 225: /* arg: arg '&' arg  */
+#line 2812 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "&", (yyvsp[0].nd));
+                    }
+#line 8483 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 226: /* arg: arg "<=>" arg  */
+#line 2816 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "<=>", (yyvsp[0].nd));
+                    }
+#line 8491 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 227: /* arg: arg '>' arg  */
+#line 2820 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), ">", (yyvsp[0].nd));
+                    }
+#line 8499 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 228: /* arg: arg ">=" arg  */
+#line 2824 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), ">=", (yyvsp[0].nd));
+                    }
+#line 8507 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 229: /* arg: arg '<' arg  */
+#line 2828 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "<", (yyvsp[0].nd));
+                    }
+#line 8515 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 230: /* arg: arg "<=" arg  */
+#line 2832 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "<=", (yyvsp[0].nd));
+                    }
+#line 8523 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 231: /* arg: arg "==" arg  */
+#line 2836 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "==", (yyvsp[0].nd));
+                    }
+#line 8531 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 232: /* arg: arg "===" arg  */
+#line 2840 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "===", (yyvsp[0].nd));
+                    }
+#line 8539 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 233: /* arg: arg "!=" arg  */
+#line 2844 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "!=", (yyvsp[0].nd));
+                    }
+#line 8547 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 234: /* arg: arg "=~" arg  */
+#line 2848 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "=~", (yyvsp[0].nd));
+                    }
+#line 8555 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 235: /* arg: arg "!~" arg  */
+#line 2852 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "!~", (yyvsp[0].nd));
+                    }
+#line 8563 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 236: /* arg: '!' arg  */
+#line 2856 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = call_uni_op(p, cond((yyvsp[0].nd)), "!");
+                    }
+#line 8571 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 237: /* arg: '~' arg  */
+#line 2860 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = call_uni_op(p, cond((yyvsp[0].nd)), "~");
+                    }
+#line 8579 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 238: /* arg: arg "<<" arg  */
+#line 2864 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "<<", (yyvsp[0].nd));
+                    }
+#line 8587 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 239: /* arg: arg ">>" arg  */
+#line 2868 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), ">>", (yyvsp[0].nd));
+                    }
+#line 8595 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 240: /* arg: arg "&&" arg  */
+#line 2872 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_and(p, (yyvsp[-2].nd), (yyvsp[0].nd));
+                    }
+#line 8603 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 241: /* arg: arg "||" arg  */
+#line 2876 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_or(p, (yyvsp[-2].nd), (yyvsp[0].nd));
+                    }
+#line 8611 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 242: /* arg: arg '?' arg opt_nl ':' arg  */
+#line 2880 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_if(p, cond((yyvsp[-5].nd)), (yyvsp[-3].nd), (yyvsp[0].nd));
+                    }
+#line 8619 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 243: /* arg: arg '?' arg opt_nl "label" arg  */
+#line 2884 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_if(p, cond((yyvsp[-5].nd)), (yyvsp[-3].nd), (yyvsp[0].nd));
+                    }
+#line 8627 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
   case 244: /* arg: defn_head f_opt_arglist_paren '=' arg  */
-#line 2728 "mrbgems/mruby-compiler/core/parse.y"
+#line 2888 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-3].nd);
                       endless_method_name(p, (yyvsp[-3].nd));
@@ -8476,11 +8636,11 @@ yyreduce:
                       nvars_unnest(p);
                       p->in_def--;
                     }
-#line 8480 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8640 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 245: /* arg: defn_head f_opt_arglist_paren '=' arg "'rescue' modifier" arg  */
-#line 2737 "mrbgems/mruby-compiler/core/parse.y"
+#line 2897 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-5].nd);
                       endless_method_name(p, (yyvsp[-5].nd));
@@ -8489,11 +8649,11 @@ yyreduce:
                       nvars_unnest(p);
                       p->in_def--;
                     }
-#line 8493 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8653 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 246: /* arg: defs_head f_opt_arglist_paren '=' arg  */
-#line 2746 "mrbgems/mruby-compiler/core/parse.y"
+#line 2906 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-3].nd);
                       void_expr_error(p, (yyvsp[0].nd));
@@ -8502,11 +8662,11 @@ yyreduce:
                       p->in_def--;
                       p->in_single--;
                     }
-#line 8506 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8666 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 247: /* arg: defs_head f_opt_arglist_paren '=' arg "'rescue' modifier" arg  */
-#line 2755 "mrbgems/mruby-compiler/core/parse.y"
+#line 2915 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-5].nd);
                       void_expr_error(p, (yyvsp[-2].nd));
@@ -8515,68 +8675,68 @@ yyreduce:
                       p->in_def--;
                       p->in_single--;
                     }
-#line 8519 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8679 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 248: /* arg: primary  */
-#line 2764 "mrbgems/mruby-compiler/core/parse.y"
+#line 2924 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 8527 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8687 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 250: /* aref_args: args trailer  */
-#line 2771 "mrbgems/mruby-compiler/core/parse.y"
+#line 2931 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 8535 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8695 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 251: /* aref_args: args comma assocs trailer  */
-#line 2775 "mrbgems/mruby-compiler/core/parse.y"
+#line 2935 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-3].nd), new_hash(p, (yyvsp[-1].nd)));
                     }
-#line 8543 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8703 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 252: /* aref_args: assocs trailer  */
-#line 2779 "mrbgems/mruby-compiler/core/parse.y"
+#line 2939 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = cons(new_kw_hash(p, (yyvsp[-1].nd)), 0);
                     }
-#line 8551 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8711 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 253: /* arg_rhs: arg  */
-#line 2785 "mrbgems/mruby-compiler/core/parse.y"
+#line 2945 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 8559 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8719 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 254: /* arg_rhs: arg "'rescue' modifier" arg  */
-#line 2789 "mrbgems/mruby-compiler/core/parse.y"
+#line 2949 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       void_expr_error(p, (yyvsp[-2].nd));
                       (yyval.nd) = new_mod_rescue(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 8568 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8728 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 255: /* paren_args: '(' opt_call_args ')'  */
-#line 2796 "mrbgems/mruby-compiler/core/parse.y"
+#line 2956 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 8576 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8736 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 256: /* paren_args: '(' args comma tBDOT3 rparen  */
-#line 2800 "mrbgems/mruby-compiler/core/parse.y"
+#line 2960 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       mrb_sym r = intern_op(mul);
                       mrb_sym k = intern_op(pow);
@@ -8585,11 +8745,11 @@ yyreduce:
                                         new_kw_hash(p, list1(cons(new_kw_rest_args(p, 0), new_lvar(p, k)))),
                                         new_block_arg(p, new_lvar(p, b)));
                     }
-#line 8589 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8749 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 257: /* paren_args: '(' tBDOT3 rparen  */
-#line 2809 "mrbgems/mruby-compiler/core/parse.y"
+#line 2969 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       mrb_sym r = intern_op(mul);
                       mrb_sym k = intern_op(pow);
@@ -8604,374 +8764,374 @@ yyreduce:
                         (yyval.nd) = 0;
                       }
                     }
-#line 8608 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8768 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 262: /* opt_call_args: args comma  */
-#line 2832 "mrbgems/mruby-compiler/core/parse.y"
+#line 2992 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_callargs(p,(yyvsp[-1].nd),0,0);
                     }
-#line 8616 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8776 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 263: /* opt_call_args: args comma assocs comma  */
-#line 2836 "mrbgems/mruby-compiler/core/parse.y"
+#line 2996 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_callargs(p,(yyvsp[-3].nd),new_kw_hash(p,(yyvsp[-1].nd)),0);
                     }
-#line 8624 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8784 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 264: /* opt_call_args: assocs comma  */
-#line 2840 "mrbgems/mruby-compiler/core/parse.y"
+#line 3000 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_callargs(p,0,new_kw_hash(p,(yyvsp[-1].nd)),0);
                     }
-#line 8632 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8792 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 265: /* call_args: command  */
-#line 2846 "mrbgems/mruby-compiler/core/parse.y"
+#line 3006 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       void_expr_error(p, (yyvsp[0].nd));
                       (yyval.nd) = new_callargs(p, list1((yyvsp[0].nd)), 0, 0);
                     }
-#line 8641 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8801 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 266: /* call_args: args opt_block_arg  */
-#line 2851 "mrbgems/mruby-compiler/core/parse.y"
+#line 3011 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_callargs(p, (yyvsp[-1].nd), 0, (yyvsp[0].nd));
                     }
-#line 8649 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8809 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 267: /* call_args: assocs opt_block_arg  */
-#line 2855 "mrbgems/mruby-compiler/core/parse.y"
+#line 3015 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_callargs(p, 0, new_kw_hash(p, (yyvsp[-1].nd)), (yyvsp[0].nd));
                     }
-#line 8657 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8817 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 268: /* call_args: args comma assocs opt_block_arg  */
-#line 2859 "mrbgems/mruby-compiler/core/parse.y"
+#line 3019 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_callargs(p, (yyvsp[-3].nd), new_kw_hash(p, (yyvsp[-1].nd)), (yyvsp[0].nd));
                     }
-#line 8665 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8825 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 269: /* call_args: block_arg  */
-#line 2863 "mrbgems/mruby-compiler/core/parse.y"
+#line 3023 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_callargs(p, 0, 0, (yyvsp[0].nd));
                     }
-#line 8673 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 270: /* @7: %empty  */
-#line 2868 "mrbgems/mruby-compiler/core/parse.y"
-                   {
-                      (yyval.stack) = p->cmdarg_stack;
-                      CMDARG_PUSH(1);
-                    }
-#line 8682 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 271: /* command_args: @7 call_args  */
-#line 2873 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      p->cmdarg_stack = (yyvsp[-1].stack);
-                      (yyval.nd) = (yyvsp[0].nd);
-                    }
-#line 8691 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 272: /* block_arg: "&" arg  */
-#line 2880 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_block_arg(p, (yyvsp[0].nd));
-                    }
-#line 8699 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 273: /* block_arg: "&"  */
-#line 2884 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_block_arg(p, 0);
-                    }
-#line 8707 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 274: /* opt_block_arg: comma block_arg  */
-#line 2890 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = (yyvsp[0].nd);
-                    }
-#line 8715 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 275: /* opt_block_arg: none  */
-#line 2894 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = 0;
-                    }
-#line 8723 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 277: /* args: arg  */
-#line 2903 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      void_expr_error(p, (yyvsp[0].nd));
-                      (yyval.nd) = list1((yyvsp[0].nd));
-                    }
-#line 8732 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 278: /* args: "*"  */
-#line 2908 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = list1(new_splat(p, new_lvar(p, intern_op(mul))));
-                    }
-#line 8740 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 279: /* args: "*" arg  */
-#line 2912 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = list1(new_splat(p, (yyvsp[0].nd)));
-                    }
-#line 8748 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 280: /* args: args comma arg  */
-#line 2916 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      void_expr_error(p, (yyvsp[0].nd));
-                      (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
-                    }
-#line 8757 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 281: /* args: args comma "*"  */
-#line 2921 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = push((yyvsp[-2].nd), new_splat(p, new_lvar(p, intern_op(mul))));
-                    }
-#line 8765 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 282: /* args: args comma "*" arg  */
-#line 2925 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = push((yyvsp[-3].nd), new_splat(p, (yyvsp[0].nd)));
-                    }
-#line 8773 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 283: /* mrhs: args comma arg  */
-#line 2931 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      void_expr_error(p, (yyvsp[0].nd));
-                      (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
-                    }
-#line 8782 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 284: /* mrhs: args comma "*" arg  */
-#line 2936 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = push((yyvsp[-3].nd), new_splat(p, (yyvsp[0].nd)));
-                    }
-#line 8790 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 285: /* mrhs: "*" arg  */
-#line 2940 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = list1(new_splat(p, (yyvsp[0].nd)));
-                    }
-#line 8798 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 293: /* primary: "method"  */
-#line 2953 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_fcall(p, (yyvsp[0].id), 0);
-                    }
-#line 8806 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 294: /* @8: %empty  */
-#line 2957 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.stack) = p->cmdarg_stack;
-                      p->cmdarg_stack = 0;
-                    }
-#line 8815 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 295: /* primary: "'begin'" @8 bodystmt "'end'"  */
-#line 2963 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      p->cmdarg_stack = (yyvsp[-2].stack);
-                      (yyval.nd) = new_begin(p, (yyvsp[-1].nd));
-                    }
-#line 8824 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 296: /* @9: %empty  */
-#line 2968 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.stack) = p->cmdarg_stack;
-                      p->cmdarg_stack = 0;
-                    }
 #line 8833 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 297: /* $@10: %empty  */
-#line 2972 "mrbgems/mruby-compiler/core/parse.y"
-                       {p->lstate = EXPR_ENDARG;}
-#line 8839 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 298: /* primary: "(" @9 stmt $@10 rparen  */
-#line 2973 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      p->cmdarg_stack = (yyvsp[-3].stack);
-                      (yyval.nd) = (yyvsp[-2].nd);
+  case 270: /* @7: %empty  */
+#line 3028 "mrbgems/mruby-compiler/core/parse.y"
+                   {
+                      (yyval.stack) = p->cmdarg_stack;
+                      CMDARG_PUSH(1);
                     }
-#line 8848 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8842 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 299: /* $@11: %empty  */
-#line 2977 "mrbgems/mruby-compiler/core/parse.y"
-                              {p->lstate = EXPR_ENDARG;}
-#line 8854 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 300: /* primary: "(" $@11 rparen  */
-#line 2978 "mrbgems/mruby-compiler/core/parse.y"
+  case 271: /* command_args: @7 call_args  */
+#line 3033 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = new_nil(p);
+                      p->cmdarg_stack = (yyvsp[-1].stack);
+                      (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 8862 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8851 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 301: /* primary: tLPAREN compstmt ')'  */
-#line 2982 "mrbgems/mruby-compiler/core/parse.y"
+  case 272: /* block_arg: "&" arg  */
+#line 3040 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = (yyvsp[-1].nd);
+                      (yyval.nd) = new_block_arg(p, (yyvsp[0].nd));
                     }
-#line 8870 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8859 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 302: /* primary: primary_value "::" "constant"  */
-#line 2986 "mrbgems/mruby-compiler/core/parse.y"
+  case 273: /* block_arg: "&"  */
+#line 3044 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = new_colon2(p, (yyvsp[-2].nd), (yyvsp[0].id));
+                      (yyval.nd) = new_block_arg(p, 0);
                     }
-#line 8878 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8867 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 303: /* primary: tCOLON3 "constant"  */
-#line 2990 "mrbgems/mruby-compiler/core/parse.y"
+  case 274: /* opt_block_arg: comma block_arg  */
+#line 3050 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = new_colon3(p, (yyvsp[0].id));
+                      (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 8886 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8875 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 304: /* primary: "[" aref_args ']'  */
-#line 2994 "mrbgems/mruby-compiler/core/parse.y"
+  case 275: /* opt_block_arg: none  */
+#line 3054 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = new_array(p, (yyvsp[-1].nd));
+                      (yyval.nd) = 0;
                     }
-#line 8894 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8883 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 305: /* primary: tLBRACE assoc_list '}'  */
-#line 2998 "mrbgems/mruby-compiler/core/parse.y"
+  case 277: /* args: arg  */
+#line 3063 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = new_hash(p, (yyvsp[-1].nd));
+                      void_expr_error(p, (yyvsp[0].nd));
+                      (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 8902 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8892 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 306: /* primary: "'return'"  */
-#line 3002 "mrbgems/mruby-compiler/core/parse.y"
+  case 278: /* args: "*"  */
+#line 3068 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = new_return(p, 0);
+                      (yyval.nd) = list1(new_splat(p, new_lvar(p, intern_op(mul))));
                     }
-#line 8910 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8900 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 307: /* primary: "'yield'" opt_paren_args  */
-#line 3006 "mrbgems/mruby-compiler/core/parse.y"
+  case 279: /* args: "*" arg  */
+#line 3072 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = new_yield(p, (yyvsp[0].nd));
+                      (yyval.nd) = list1(new_splat(p, (yyvsp[0].nd)));
                     }
-#line 8918 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8908 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 308: /* primary: "'not'" '(' expr rparen  */
-#line 3010 "mrbgems/mruby-compiler/core/parse.y"
+  case 280: /* args: args comma arg  */
+#line 3076 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = call_uni_op(p, cond((yyvsp[-1].nd)), "!");
+                      void_expr_error(p, (yyvsp[0].nd));
+                      (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 8926 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8917 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 309: /* primary: "'not'" '(' rparen  */
-#line 3014 "mrbgems/mruby-compiler/core/parse.y"
+  case 281: /* args: args comma "*"  */
+#line 3081 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = call_uni_op(p, new_nil(p), "!");
+                      (yyval.nd) = push((yyvsp[-2].nd), new_splat(p, new_lvar(p, intern_op(mul))));
                     }
-#line 8934 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8925 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 310: /* primary: operation brace_block  */
-#line 3018 "mrbgems/mruby-compiler/core/parse.y"
+  case 282: /* args: args comma "*" arg  */
+#line 3085 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = new_fcall(p, (yyvsp[-1].id), new_callargs(p, 0, 0, (yyvsp[0].nd)));
+                      (yyval.nd) = push((yyvsp[-3].nd), new_splat(p, (yyvsp[0].nd)));
+                    }
+#line 8933 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 283: /* mrhs: args comma arg  */
+#line 3091 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      void_expr_error(p, (yyvsp[0].nd));
+                      (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
 #line 8942 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
+  case 284: /* mrhs: args comma "*" arg  */
+#line 3096 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = push((yyvsp[-3].nd), new_splat(p, (yyvsp[0].nd)));
+                    }
+#line 8950 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 285: /* mrhs: "*" arg  */
+#line 3100 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = list1(new_splat(p, (yyvsp[0].nd)));
+                    }
+#line 8958 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 293: /* primary: "method"  */
+#line 3113 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_fcall(p, (yyvsp[0].id), 0);
+                    }
+#line 8966 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 294: /* @8: %empty  */
+#line 3117 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.stack) = p->cmdarg_stack;
+                      p->cmdarg_stack = 0;
+                    }
+#line 8975 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 295: /* primary: "'begin'" @8 bodystmt "'end'"  */
+#line 3123 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      p->cmdarg_stack = (yyvsp[-2].stack);
+                      (yyval.nd) = new_begin(p, (yyvsp[-1].nd));
+                    }
+#line 8984 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 296: /* @9: %empty  */
+#line 3128 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.stack) = p->cmdarg_stack;
+                      p->cmdarg_stack = 0;
+                    }
+#line 8993 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 297: /* $@10: %empty  */
+#line 3132 "mrbgems/mruby-compiler/core/parse.y"
+                       {p->lstate = EXPR_ENDARG;}
+#line 8999 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 298: /* primary: "(" @9 stmt $@10 rparen  */
+#line 3133 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      p->cmdarg_stack = (yyvsp[-3].stack);
+                      (yyval.nd) = (yyvsp[-2].nd);
+                    }
+#line 9008 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 299: /* $@11: %empty  */
+#line 3137 "mrbgems/mruby-compiler/core/parse.y"
+                              {p->lstate = EXPR_ENDARG;}
+#line 9014 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 300: /* primary: "(" $@11 rparen  */
+#line 3138 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_nil(p);
+                    }
+#line 9022 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 301: /* primary: tLPAREN compstmt ')'  */
+#line 3142 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = (yyvsp[-1].nd);
+                    }
+#line 9030 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 302: /* primary: primary_value "::" "constant"  */
+#line 3146 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_colon2(p, (yyvsp[-2].nd), (yyvsp[0].id));
+                    }
+#line 9038 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 303: /* primary: tCOLON3 "constant"  */
+#line 3150 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_colon3(p, (yyvsp[0].id));
+                    }
+#line 9046 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 304: /* primary: "[" aref_args ']'  */
+#line 3154 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_array(p, (yyvsp[-1].nd));
+                    }
+#line 9054 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 305: /* primary: tLBRACE assoc_list '}'  */
+#line 3158 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_hash(p, (yyvsp[-1].nd));
+                    }
+#line 9062 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 306: /* primary: "'return'"  */
+#line 3162 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_return(p, 0);
+                    }
+#line 9070 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 307: /* primary: "'yield'" opt_paren_args  */
+#line 3166 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_yield(p, (yyvsp[0].nd));
+                    }
+#line 9078 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 308: /* primary: "'not'" '(' expr rparen  */
+#line 3170 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = call_uni_op(p, cond((yyvsp[-1].nd)), "!");
+                    }
+#line 9086 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 309: /* primary: "'not'" '(' rparen  */
+#line 3174 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = call_uni_op(p, new_nil(p), "!");
+                    }
+#line 9094 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 310: /* primary: operation brace_block  */
+#line 3178 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_fcall(p, (yyvsp[-1].id), new_callargs(p, 0, 0, (yyvsp[0].nd)));
+                    }
+#line 9102 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
   case 312: /* primary: method_call brace_block  */
-#line 3023 "mrbgems/mruby-compiler/core/parse.y"
+#line 3183 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       call_with_block(p, (yyvsp[-1].nd), (yyvsp[0].nd));
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 8951 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9111 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 313: /* @12: %empty  */
-#line 3028 "mrbgems/mruby-compiler/core/parse.y"
+#line 3188 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_nest(p);
                       nvars_nest(p);
                       (yyval.num) = p->lpar_beg;
                       p->lpar_beg = ++p->paren_nest;
                     }
-#line 8962 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9122 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 314: /* @13: %empty  */
-#line 3035 "mrbgems/mruby-compiler/core/parse.y"
+#line 3195 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.stack) = p->cmdarg_stack;
                       p->cmdarg_stack = 0;
                     }
-#line 8971 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9131 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 315: /* primary: "->" @12 f_larglist @13 lambda_body  */
-#line 3040 "mrbgems/mruby-compiler/core/parse.y"
+#line 3200 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->lpar_beg = (yyvsp[-3].num);
                       (yyval.nd) = new_lambda(p, (yyvsp[-2].nd), (yyvsp[0].nd));
@@ -8980,149 +9140,149 @@ yyreduce:
                       p->cmdarg_stack = (yyvsp[-1].stack);
                       CMDARG_LEXPOP();
                     }
-#line 8984 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9144 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 316: /* primary: "'if'" expr_value then compstmt if_tail "'end'"  */
-#line 3052 "mrbgems/mruby-compiler/core/parse.y"
+#line 3212 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_if(p, cond((yyvsp[-4].nd)), (yyvsp[-2].nd), (yyvsp[-1].nd));
                       SET_LINENO((yyval.nd), (yyvsp[-5].num));
                     }
-#line 8993 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9153 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 317: /* primary: "'unless'" expr_value then compstmt opt_else "'end'"  */
-#line 3060 "mrbgems/mruby-compiler/core/parse.y"
+#line 3220 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_unless(p, cond((yyvsp[-4].nd)), (yyvsp[-2].nd), (yyvsp[-1].nd));
                       SET_LINENO((yyval.nd), (yyvsp[-5].num));
                     }
-#line 9002 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9162 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 318: /* $@14: %empty  */
-#line 3064 "mrbgems/mruby-compiler/core/parse.y"
+#line 3224 "mrbgems/mruby-compiler/core/parse.y"
                                 {COND_PUSH(1);}
-#line 9008 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9168 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 319: /* $@15: %empty  */
-#line 3064 "mrbgems/mruby-compiler/core/parse.y"
+#line 3224 "mrbgems/mruby-compiler/core/parse.y"
                                                               {COND_POP();}
-#line 9014 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9174 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 320: /* primary: "'while'" $@14 expr_value do $@15 compstmt "'end'"  */
-#line 3067 "mrbgems/mruby-compiler/core/parse.y"
+#line 3227 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_while(p, cond((yyvsp[-4].nd)), (yyvsp[-1].nd));
                       SET_LINENO((yyval.nd), (yyvsp[-6].num));
                     }
-#line 9023 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9183 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 321: /* $@16: %empty  */
-#line 3071 "mrbgems/mruby-compiler/core/parse.y"
+#line 3231 "mrbgems/mruby-compiler/core/parse.y"
                                 {COND_PUSH(1);}
-#line 9029 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9189 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 322: /* $@17: %empty  */
-#line 3071 "mrbgems/mruby-compiler/core/parse.y"
+#line 3231 "mrbgems/mruby-compiler/core/parse.y"
                                                               {COND_POP();}
-#line 9035 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9195 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 323: /* primary: "'until'" $@16 expr_value do $@17 compstmt "'end'"  */
-#line 3074 "mrbgems/mruby-compiler/core/parse.y"
+#line 3234 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_until(p, cond((yyvsp[-4].nd)), (yyvsp[-1].nd));
                       SET_LINENO((yyval.nd), (yyvsp[-6].num));
                     }
-#line 9044 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9204 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 324: /* primary: "'case'" expr_value opt_terms case_body "'end'"  */
-#line 3081 "mrbgems/mruby-compiler/core/parse.y"
+#line 3241 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_case(p, (yyvsp[-3].nd), (yyvsp[-1].nd));
                     }
-#line 9052 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9212 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 325: /* primary: "'case'" opt_terms case_body "'end'"  */
-#line 3085 "mrbgems/mruby-compiler/core/parse.y"
+#line 3245 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_case(p, 0, (yyvsp[-1].nd));
                     }
-#line 9060 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9220 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 326: /* $@18: %empty  */
-#line 3089 "mrbgems/mruby-compiler/core/parse.y"
+#line 3249 "mrbgems/mruby-compiler/core/parse.y"
                   {COND_PUSH(1);}
-#line 9066 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9226 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 327: /* $@19: %empty  */
-#line 3091 "mrbgems/mruby-compiler/core/parse.y"
+#line 3251 "mrbgems/mruby-compiler/core/parse.y"
                   {COND_POP();}
-#line 9072 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9232 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 328: /* primary: "'for'" for_var "'in'" $@18 expr_value do $@19 compstmt "'end'"  */
-#line 3094 "mrbgems/mruby-compiler/core/parse.y"
+#line 3254 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_for(p, (yyvsp[-7].nd), (yyvsp[-4].nd), (yyvsp[-1].nd));
                       SET_LINENO((yyval.nd), (yyvsp[-8].num));
                     }
-#line 9081 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9241 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 329: /* @20: %empty  */
-#line 3100 "mrbgems/mruby-compiler/core/parse.y"
+#line 3260 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if (p->in_def || p->in_single)
                         yyerror(&(yylsp[-2]), p, "class definition in method body");
                       (yyval.nd) = local_switch(p);
                       nvars_block(p);
                     }
-#line 9092 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9252 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 330: /* primary: "'class'" cpath superclass @20 bodystmt "'end'"  */
-#line 3108 "mrbgems/mruby-compiler/core/parse.y"
+#line 3268 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_class(p, (yyvsp[-4].nd), (yyvsp[-3].nd), (yyvsp[-1].nd));
                       SET_LINENO((yyval.nd), (yyvsp[-5].num));
                       local_resume(p, (yyvsp[-2].nd));
                       nvars_unnest(p);
                     }
-#line 9103 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9263 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 331: /* @21: %empty  */
-#line 3116 "mrbgems/mruby-compiler/core/parse.y"
+#line 3276 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.num) = p->in_def;
                       p->in_def = 0;
                     }
-#line 9112 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9272 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 332: /* @22: %empty  */
-#line 3121 "mrbgems/mruby-compiler/core/parse.y"
+#line 3281 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = cons(local_switch(p), int_to_node(p->in_single));
                       nvars_block(p);
                       p->in_single = 0;
                     }
-#line 9122 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9282 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 333: /* primary: "'class'" "<<" expr @21 term @22 bodystmt "'end'"  */
-#line 3128 "mrbgems/mruby-compiler/core/parse.y"
+#line 3288 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_sclass(p, (yyvsp[-5].nd), (yyvsp[-1].nd));
                       SET_LINENO((yyval.nd), (yyvsp[-7].num));
@@ -9131,44 +9291,44 @@ yyreduce:
                       p->in_def = (yyvsp[-4].num);
                       p->in_single = node_to_int((yyvsp[-2].nd)->cdr);
                     }
-#line 9135 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9295 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 334: /* @23: %empty  */
-#line 3138 "mrbgems/mruby-compiler/core/parse.y"
+#line 3298 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if (p->in_def || p->in_single)
                         yyerror(&(yylsp[-1]), p, "module definition in method body");
                       (yyval.nd) = local_switch(p);
                       nvars_block(p);
                     }
-#line 9146 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9306 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 335: /* primary: "'module'" cpath @23 bodystmt "'end'"  */
-#line 3146 "mrbgems/mruby-compiler/core/parse.y"
+#line 3306 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_module(p, (yyvsp[-3].nd), (yyvsp[-1].nd));
                       SET_LINENO((yyval.nd), (yyvsp[-4].num));
                       local_resume(p, (yyvsp[-2].nd));
                       nvars_unnest(p);
                     }
-#line 9157 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9317 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 336: /* primary: defn_head f_arglist bodystmt "'end'"  */
-#line 3156 "mrbgems/mruby-compiler/core/parse.y"
+#line 3316 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-3].nd);
                       defn_setup(p, (yyval.nd), (yyvsp[-2].nd), (yyvsp[-1].nd));
                       nvars_unnest(p);
                       p->in_def--;
                     }
-#line 9168 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9328 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 337: /* primary: defs_head f_arglist bodystmt "'end'"  */
-#line 3166 "mrbgems/mruby-compiler/core/parse.y"
+#line 3326 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-3].nd);
                       defs_setup(p, (yyval.nd), (yyvsp[-2].nd), (yyvsp[-1].nd));
@@ -9176,453 +9336,453 @@ yyreduce:
                       p->in_def--;
                       p->in_single--;
                     }
-#line 9180 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9340 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 338: /* primary: "'break'"  */
-#line 3174 "mrbgems/mruby-compiler/core/parse.y"
+#line 3334 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_break(p, 0);
                     }
-#line 9188 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9348 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 339: /* primary: "'next'"  */
-#line 3178 "mrbgems/mruby-compiler/core/parse.y"
+#line 3338 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_next(p, 0);
                     }
-#line 9196 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9356 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 340: /* primary: "'redo'"  */
-#line 3182 "mrbgems/mruby-compiler/core/parse.y"
+#line 3342 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_redo(p);
                     }
-#line 9204 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9364 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 341: /* primary: "'retry'"  */
-#line 3186 "mrbgems/mruby-compiler/core/parse.y"
+#line 3346 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_retry(p);
                     }
-#line 9212 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9372 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 342: /* primary_value: primary  */
-#line 3192 "mrbgems/mruby-compiler/core/parse.y"
+#line 3352 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                       if (!(yyval.nd)) (yyval.nd) = new_nil(p);
                     }
-#line 9221 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9381 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 349: /* if_tail: "'elsif'" expr_value then compstmt if_tail  */
-#line 3211 "mrbgems/mruby-compiler/core/parse.y"
+#line 3371 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_if(p, cond((yyvsp[-3].nd)), (yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 9229 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9389 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 351: /* opt_else: "'else'" compstmt  */
-#line 3218 "mrbgems/mruby-compiler/core/parse.y"
+#line 3378 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 9237 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9397 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 352: /* for_var: lhs  */
-#line 3224 "mrbgems/mruby-compiler/core/parse.y"
+#line 3384 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1(list1((yyvsp[0].nd)));
                     }
-#line 9245 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9405 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 354: /* f_margs: f_arg  */
-#line 3231 "mrbgems/mruby-compiler/core/parse.y"
+#line 3391 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3((yyvsp[0].nd),0,0);
                     }
-#line 9253 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9413 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 355: /* f_margs: f_arg ',' "*" f_norm_arg  */
-#line 3235 "mrbgems/mruby-compiler/core/parse.y"
+#line 3395 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3((yyvsp[-3].nd), new_arg(p, (yyvsp[0].id)), 0);
                     }
-#line 9261 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9421 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 356: /* f_margs: f_arg ',' "*" f_norm_arg ',' f_arg  */
-#line 3239 "mrbgems/mruby-compiler/core/parse.y"
+#line 3399 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3((yyvsp[-5].nd), new_arg(p, (yyvsp[-2].id)), (yyvsp[0].nd));
                     }
-#line 9269 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9429 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 357: /* f_margs: f_arg ',' "*"  */
-#line 3243 "mrbgems/mruby-compiler/core/parse.y"
+#line 3403 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_f(p, intern_op(mul));
                       (yyval.nd) = list3((yyvsp[-2].nd), int_to_node(-1), 0);
                     }
-#line 9278 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9438 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 358: /* f_margs: f_arg ',' "*" ',' f_arg  */
-#line 3248 "mrbgems/mruby-compiler/core/parse.y"
+#line 3408 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3((yyvsp[-4].nd), int_to_node(-1), (yyvsp[0].nd));
                     }
-#line 9286 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9446 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 359: /* f_margs: "*" f_norm_arg  */
-#line 3252 "mrbgems/mruby-compiler/core/parse.y"
+#line 3412 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3(0, new_arg(p, (yyvsp[0].id)), 0);
                     }
-#line 9294 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9454 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 360: /* f_margs: "*" f_norm_arg ',' f_arg  */
-#line 3256 "mrbgems/mruby-compiler/core/parse.y"
+#line 3416 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3(0, new_arg(p, (yyvsp[-2].id)), (yyvsp[0].nd));
                     }
-#line 9302 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9462 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 361: /* f_margs: "*"  */
-#line 3260 "mrbgems/mruby-compiler/core/parse.y"
+#line 3420 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_f(p, intern_op(mul));
                       (yyval.nd) = list3(0, int_to_node(-1), 0);
                     }
-#line 9311 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 362: /* $@24: %empty  */
-#line 3265 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      local_add_f(p, intern_op(mul));
-                    }
-#line 9319 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 363: /* f_margs: "*" ',' $@24 f_arg  */
-#line 3269 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = list3(0, int_to_node(-1), (yyvsp[0].nd));
-                    }
-#line 9327 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 364: /* block_args_tail: f_block_kwarg ',' f_kwrest opt_f_block_arg  */
-#line 3275 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_args_tail(p, (yyvsp[-3].nd), (yyvsp[-1].nd), (yyvsp[0].id));
-                    }
-#line 9335 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 365: /* block_args_tail: f_block_kwarg opt_f_block_arg  */
-#line 3279 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_args_tail(p, (yyvsp[-1].nd), 0, (yyvsp[0].id));
-                    }
-#line 9343 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 366: /* block_args_tail: f_kwrest opt_f_block_arg  */
-#line 3283 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_args_tail(p, 0, (yyvsp[-1].nd), (yyvsp[0].id));
-                    }
-#line 9351 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 367: /* block_args_tail: f_block_arg  */
-#line 3287 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_args_tail(p, 0, 0, (yyvsp[0].id));
-                    }
-#line 9359 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 368: /* opt_block_args_tail: ',' block_args_tail  */
-#line 3293 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = (yyvsp[0].nd);
-                    }
-#line 9367 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 369: /* opt_block_args_tail: %empty  */
-#line 3297 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_args_tail(p, 0, 0, 0);
-                    }
-#line 9375 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 370: /* block_param: f_arg ',' f_block_optarg ',' f_rest_arg opt_block_args_tail  */
-#line 3303 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_args(p, (yyvsp[-5].nd), (yyvsp[-3].nd), (yyvsp[-1].id), 0, (yyvsp[0].nd));
-                    }
-#line 9383 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 371: /* block_param: f_arg ',' f_block_optarg ',' f_rest_arg ',' f_arg opt_block_args_tail  */
-#line 3307 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_args(p, (yyvsp[-7].nd), (yyvsp[-5].nd), (yyvsp[-3].id), (yyvsp[-1].nd), (yyvsp[0].nd));
-                    }
-#line 9391 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 372: /* block_param: f_arg ',' f_block_optarg opt_block_args_tail  */
-#line 3311 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_args(p, (yyvsp[-3].nd), (yyvsp[-1].nd), 0, 0, (yyvsp[0].nd));
-                    }
-#line 9399 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 373: /* block_param: f_arg ',' f_block_optarg ',' f_arg opt_block_args_tail  */
-#line 3315 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_args(p, (yyvsp[-5].nd), (yyvsp[-3].nd), 0, (yyvsp[-1].nd), (yyvsp[0].nd));
-                    }
-#line 9407 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 374: /* block_param: f_arg ',' f_rest_arg opt_block_args_tail  */
-#line 3319 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_args(p, (yyvsp[-3].nd), 0, (yyvsp[-1].id), 0, (yyvsp[0].nd));
-                    }
-#line 9415 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 375: /* block_param: f_arg ',' opt_block_args_tail  */
-#line 3323 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_args(p, (yyvsp[-2].nd), 0, 0, 0, (yyvsp[0].nd));
-                    }
-#line 9423 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 376: /* block_param: f_arg ',' f_rest_arg ',' f_arg opt_block_args_tail  */
-#line 3327 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_args(p, (yyvsp[-5].nd), 0, (yyvsp[-3].id), (yyvsp[-1].nd), (yyvsp[0].nd));
-                    }
-#line 9431 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 377: /* block_param: f_arg opt_block_args_tail  */
-#line 3331 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_args(p, (yyvsp[-1].nd), 0, 0, 0, (yyvsp[0].nd));
-                    }
-#line 9439 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 378: /* block_param: f_block_optarg ',' f_rest_arg opt_block_args_tail  */
-#line 3335 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_args(p, 0, (yyvsp[-3].nd), (yyvsp[-1].id), 0, (yyvsp[0].nd));
-                    }
-#line 9447 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 379: /* block_param: f_block_optarg ',' f_rest_arg ',' f_arg opt_block_args_tail  */
-#line 3339 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_args(p, 0, (yyvsp[-5].nd), (yyvsp[-3].id), (yyvsp[-1].nd), (yyvsp[0].nd));
-                    }
-#line 9455 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 380: /* block_param: f_block_optarg opt_block_args_tail  */
-#line 3343 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_args(p, 0, (yyvsp[-1].nd), 0, 0, (yyvsp[0].nd));
-                    }
-#line 9463 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 381: /* block_param: f_block_optarg ',' f_arg opt_block_args_tail  */
-#line 3347 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_args(p, 0, (yyvsp[-3].nd), 0, (yyvsp[-1].nd), (yyvsp[0].nd));
-                    }
 #line 9471 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 382: /* block_param: f_rest_arg opt_block_args_tail  */
-#line 3351 "mrbgems/mruby-compiler/core/parse.y"
+  case 362: /* $@24: %empty  */
+#line 3425 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = new_args(p, 0, 0, (yyvsp[-1].id), 0, (yyvsp[0].nd));
+                      local_add_f(p, intern_op(mul));
                     }
 #line 9479 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 383: /* block_param: f_rest_arg ',' f_arg opt_block_args_tail  */
-#line 3355 "mrbgems/mruby-compiler/core/parse.y"
+  case 363: /* f_margs: "*" ',' $@24 f_arg  */
+#line 3429 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = new_args(p, 0, 0, (yyvsp[-3].id), (yyvsp[-1].nd), (yyvsp[0].nd));
+                      (yyval.nd) = list3(0, int_to_node(-1), (yyvsp[0].nd));
                     }
 #line 9487 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 384: /* block_param: block_args_tail  */
-#line 3359 "mrbgems/mruby-compiler/core/parse.y"
+  case 364: /* block_args_tail: f_block_kwarg ',' f_kwrest opt_f_block_arg  */
+#line 3435 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = new_args(p, 0, 0, 0, 0, (yyvsp[0].nd));
+                      (yyval.nd) = new_args_tail(p, (yyvsp[-3].nd), (yyvsp[-1].nd), (yyvsp[0].id));
                     }
 #line 9495 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 385: /* opt_block_param: none  */
-#line 3365 "mrbgems/mruby-compiler/core/parse.y"
+  case 365: /* block_args_tail: f_block_kwarg opt_f_block_arg  */
+#line 3439 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      local_add_blk(p);
-                      (yyval.nd) = 0;
+                      (yyval.nd) = new_args_tail(p, (yyvsp[-1].nd), 0, (yyvsp[0].id));
                     }
-#line 9504 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9503 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 386: /* opt_block_param: block_param_def  */
-#line 3370 "mrbgems/mruby-compiler/core/parse.y"
-                   {
-                      p->cmd_start = TRUE;
-                      (yyval.nd) = (yyvsp[0].nd);
+  case 366: /* block_args_tail: f_kwrest opt_f_block_arg  */
+#line 3443 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_args_tail(p, 0, (yyvsp[-1].nd), (yyvsp[0].id));
                     }
-#line 9513 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9511 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 387: /* $@25: %empty  */
-#line 3376 "mrbgems/mruby-compiler/core/parse.y"
-                      {local_add_blk(p);}
+  case 367: /* block_args_tail: f_block_arg  */
+#line 3447 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_args_tail(p, 0, 0, (yyvsp[0].id));
+                    }
 #line 9519 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 388: /* block_param_def: '|' $@25 opt_bv_decl '|'  */
-#line 3377 "mrbgems/mruby-compiler/core/parse.y"
+  case 368: /* opt_block_args_tail: ',' block_args_tail  */
+#line 3453 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = 0;
+                      (yyval.nd) = (yyvsp[0].nd);
                     }
 #line 9527 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 389: /* block_param_def: "||"  */
-#line 3381 "mrbgems/mruby-compiler/core/parse.y"
+  case 369: /* opt_block_args_tail: %empty  */
+#line 3457 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_args_tail(p, 0, 0, 0);
+                    }
+#line 9535 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 370: /* block_param: f_arg ',' f_block_optarg ',' f_rest_arg opt_block_args_tail  */
+#line 3463 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_args(p, (yyvsp[-5].nd), (yyvsp[-3].nd), (yyvsp[-1].id), 0, (yyvsp[0].nd));
+                    }
+#line 9543 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 371: /* block_param: f_arg ',' f_block_optarg ',' f_rest_arg ',' f_arg opt_block_args_tail  */
+#line 3467 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_args(p, (yyvsp[-7].nd), (yyvsp[-5].nd), (yyvsp[-3].id), (yyvsp[-1].nd), (yyvsp[0].nd));
+                    }
+#line 9551 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 372: /* block_param: f_arg ',' f_block_optarg opt_block_args_tail  */
+#line 3471 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_args(p, (yyvsp[-3].nd), (yyvsp[-1].nd), 0, 0, (yyvsp[0].nd));
+                    }
+#line 9559 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 373: /* block_param: f_arg ',' f_block_optarg ',' f_arg opt_block_args_tail  */
+#line 3475 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_args(p, (yyvsp[-5].nd), (yyvsp[-3].nd), 0, (yyvsp[-1].nd), (yyvsp[0].nd));
+                    }
+#line 9567 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 374: /* block_param: f_arg ',' f_rest_arg opt_block_args_tail  */
+#line 3479 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_args(p, (yyvsp[-3].nd), 0, (yyvsp[-1].id), 0, (yyvsp[0].nd));
+                    }
+#line 9575 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 375: /* block_param: f_arg ',' opt_block_args_tail  */
+#line 3483 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_args(p, (yyvsp[-2].nd), 0, 0, 0, (yyvsp[0].nd));
+                    }
+#line 9583 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 376: /* block_param: f_arg ',' f_rest_arg ',' f_arg opt_block_args_tail  */
+#line 3487 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_args(p, (yyvsp[-5].nd), 0, (yyvsp[-3].id), (yyvsp[-1].nd), (yyvsp[0].nd));
+                    }
+#line 9591 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 377: /* block_param: f_arg opt_block_args_tail  */
+#line 3491 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_args(p, (yyvsp[-1].nd), 0, 0, 0, (yyvsp[0].nd));
+                    }
+#line 9599 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 378: /* block_param: f_block_optarg ',' f_rest_arg opt_block_args_tail  */
+#line 3495 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_args(p, 0, (yyvsp[-3].nd), (yyvsp[-1].id), 0, (yyvsp[0].nd));
+                    }
+#line 9607 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 379: /* block_param: f_block_optarg ',' f_rest_arg ',' f_arg opt_block_args_tail  */
+#line 3499 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_args(p, 0, (yyvsp[-5].nd), (yyvsp[-3].id), (yyvsp[-1].nd), (yyvsp[0].nd));
+                    }
+#line 9615 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 380: /* block_param: f_block_optarg opt_block_args_tail  */
+#line 3503 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_args(p, 0, (yyvsp[-1].nd), 0, 0, (yyvsp[0].nd));
+                    }
+#line 9623 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 381: /* block_param: f_block_optarg ',' f_arg opt_block_args_tail  */
+#line 3507 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_args(p, 0, (yyvsp[-3].nd), 0, (yyvsp[-1].nd), (yyvsp[0].nd));
+                    }
+#line 9631 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 382: /* block_param: f_rest_arg opt_block_args_tail  */
+#line 3511 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_args(p, 0, 0, (yyvsp[-1].id), 0, (yyvsp[0].nd));
+                    }
+#line 9639 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 383: /* block_param: f_rest_arg ',' f_arg opt_block_args_tail  */
+#line 3515 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_args(p, 0, 0, (yyvsp[-3].id), (yyvsp[-1].nd), (yyvsp[0].nd));
+                    }
+#line 9647 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 384: /* block_param: block_args_tail  */
+#line 3519 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_args(p, 0, 0, 0, 0, (yyvsp[0].nd));
+                    }
+#line 9655 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 385: /* opt_block_param: none  */
+#line 3525 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_blk(p);
                       (yyval.nd) = 0;
                     }
-#line 9536 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9664 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 386: /* opt_block_param: block_param_def  */
+#line 3530 "mrbgems/mruby-compiler/core/parse.y"
+                   {
+                      p->cmd_start = TRUE;
+                      (yyval.nd) = (yyvsp[0].nd);
+                    }
+#line 9673 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 387: /* $@25: %empty  */
+#line 3536 "mrbgems/mruby-compiler/core/parse.y"
+                      {local_add_blk(p);}
+#line 9679 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 388: /* block_param_def: '|' $@25 opt_bv_decl '|'  */
+#line 3537 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = 0;
+                    }
+#line 9687 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 389: /* block_param_def: "||"  */
+#line 3541 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      local_add_blk(p);
+                      (yyval.nd) = 0;
+                    }
+#line 9696 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 390: /* block_param_def: '|' block_param opt_bv_decl '|'  */
-#line 3386 "mrbgems/mruby-compiler/core/parse.y"
+#line 3546 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-2].nd);
                     }
-#line 9544 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9704 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 391: /* opt_bv_decl: opt_nl  */
-#line 3393 "mrbgems/mruby-compiler/core/parse.y"
+#line 3553 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = 0;
                     }
-#line 9552 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9712 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 392: /* opt_bv_decl: opt_nl ';' bv_decls opt_nl  */
-#line 3397 "mrbgems/mruby-compiler/core/parse.y"
+#line 3557 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = 0;
                     }
-#line 9560 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9720 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 395: /* bvar: "local variable or method"  */
-#line 3407 "mrbgems/mruby-compiler/core/parse.y"
+#line 3567 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_f(p, (yyvsp[0].id));
                       new_bv(p, (yyvsp[0].id));
                     }
-#line 9569 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9729 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 397: /* f_larglist: '(' f_args opt_bv_decl ')'  */
-#line 3415 "mrbgems/mruby-compiler/core/parse.y"
+#line 3575 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-2].nd);
                     }
-#line 9577 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9737 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 398: /* f_larglist: f_args  */
-#line 3419 "mrbgems/mruby-compiler/core/parse.y"
+#line 3579 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 9585 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9745 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 399: /* lambda_body: tLAMBEG compstmt '}'  */
-#line 3425 "mrbgems/mruby-compiler/core/parse.y"
+#line 3585 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 9593 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9753 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 400: /* lambda_body: "'do' for lambda" bodystmt "'end'"  */
-#line 3429 "mrbgems/mruby-compiler/core/parse.y"
+#line 3589 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 9601 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9761 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 401: /* @26: %empty  */
-#line 3435 "mrbgems/mruby-compiler/core/parse.y"
+#line 3595 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_nest(p);
                       nvars_nest(p);
                       (yyval.num) = p->lineno;
                     }
-#line 9611 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9771 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 402: /* do_block: "'do' for block" @26 opt_block_param bodystmt "'end'"  */
-#line 3443 "mrbgems/mruby-compiler/core/parse.y"
+#line 3603 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_block(p,(yyvsp[-2].nd),(yyvsp[-1].nd));
                       SET_LINENO((yyval.nd), (yyvsp[-3].num));
                       local_unnest(p);
                       nvars_unnest(p);
                     }
-#line 9622 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9782 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 403: /* block_call: command do_block  */
-#line 3452 "mrbgems/mruby-compiler/core/parse.y"
+#line 3612 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if (node_to_type((yyvsp[-1].nd)->car) == NODE_YIELD) {
                         yyerror(&(yylsp[-1]), p, "block given to yield");
@@ -9632,159 +9792,159 @@ yyreduce:
                       }
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 9636 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9796 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 404: /* block_call: block_call call_op2 operation2 opt_paren_args  */
-#line 3462 "mrbgems/mruby-compiler/core/parse.y"
+#line 3622 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), (yyvsp[-1].id), (yyvsp[0].nd), (yyvsp[-2].num));
                     }
-#line 9644 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9804 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 405: /* block_call: block_call call_op2 operation2 opt_paren_args brace_block  */
-#line 3466 "mrbgems/mruby-compiler/core/parse.y"
+#line 3626 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-4].nd), (yyvsp[-2].id), (yyvsp[-1].nd), (yyvsp[-3].num));
                       call_with_block(p, (yyval.nd), (yyvsp[0].nd));
                     }
-#line 9653 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9813 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 406: /* block_call: block_call call_op2 operation2 command_args do_block  */
-#line 3471 "mrbgems/mruby-compiler/core/parse.y"
+#line 3631 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-4].nd), (yyvsp[-2].id), (yyvsp[-1].nd), (yyvsp[-3].num));
                       call_with_block(p, (yyval.nd), (yyvsp[0].nd));
                     }
-#line 9662 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9822 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 407: /* method_call: operation paren_args  */
-#line 3478 "mrbgems/mruby-compiler/core/parse.y"
+#line 3638 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_fcall(p, (yyvsp[-1].id), (yyvsp[0].nd));
                     }
-#line 9670 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9830 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 408: /* method_call: primary_value call_op operation2 opt_paren_args  */
-#line 3482 "mrbgems/mruby-compiler/core/parse.y"
+#line 3642 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), (yyvsp[-1].id), (yyvsp[0].nd), (yyvsp[-2].num));
                     }
-#line 9678 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9838 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 409: /* method_call: primary_value "::" operation2 paren_args  */
-#line 3486 "mrbgems/mruby-compiler/core/parse.y"
+#line 3646 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), (yyvsp[-1].id), (yyvsp[0].nd), tCOLON2);
                     }
-#line 9686 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9846 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 410: /* method_call: primary_value "::" operation3  */
-#line 3490 "mrbgems/mruby-compiler/core/parse.y"
+#line 3650 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-2].nd), (yyvsp[0].id), 0, tCOLON2);
                     }
-#line 9694 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9854 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 411: /* method_call: primary_value call_op paren_args  */
-#line 3494 "mrbgems/mruby-compiler/core/parse.y"
+#line 3654 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-2].nd), MRB_SYM_2(p->mrb, call), (yyvsp[0].nd), (yyvsp[-1].num));
                     }
-#line 9702 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9862 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 412: /* method_call: primary_value "::" paren_args  */
-#line 3498 "mrbgems/mruby-compiler/core/parse.y"
+#line 3658 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-2].nd), MRB_SYM_2(p->mrb, call), (yyvsp[0].nd), tCOLON2);
                     }
-#line 9710 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9870 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 413: /* method_call: "'super'" paren_args  */
-#line 3502 "mrbgems/mruby-compiler/core/parse.y"
+#line 3662 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_super(p, (yyvsp[0].nd));
                     }
-#line 9718 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9878 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 414: /* method_call: "'super'"  */
-#line 3506 "mrbgems/mruby-compiler/core/parse.y"
+#line 3666 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_zsuper(p);
                     }
-#line 9726 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9886 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 415: /* method_call: primary_value '[' opt_call_args ']'  */
-#line 3510 "mrbgems/mruby-compiler/core/parse.y"
+#line 3670 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), intern_op(aref), (yyvsp[-1].nd), '.');
                     }
-#line 9734 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9894 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 416: /* @27: %empty  */
-#line 3516 "mrbgems/mruby-compiler/core/parse.y"
+#line 3676 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_nest(p);
                       nvars_nest(p);
                       (yyval.num) = p->lineno;
                     }
-#line 9744 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9904 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 417: /* brace_block: '{' @27 opt_block_param compstmt '}'  */
-#line 3523 "mrbgems/mruby-compiler/core/parse.y"
+#line 3683 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_block(p,(yyvsp[-2].nd),(yyvsp[-1].nd));
                       SET_LINENO((yyval.nd), (yyvsp[-3].num));
                       local_unnest(p);
                       nvars_unnest(p);
                     }
-#line 9755 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9915 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 418: /* @28: %empty  */
-#line 3530 "mrbgems/mruby-compiler/core/parse.y"
+#line 3690 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_nest(p);
                       nvars_nest(p);
                       (yyval.num) = p->lineno;
                     }
-#line 9765 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9925 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 419: /* brace_block: "'do'" @28 opt_block_param bodystmt "'end'"  */
-#line 3537 "mrbgems/mruby-compiler/core/parse.y"
+#line 3697 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_block(p,(yyvsp[-2].nd),(yyvsp[-1].nd));
                       SET_LINENO((yyval.nd), (yyvsp[-3].num));
                       local_unnest(p);
                       nvars_unnest(p);
                     }
-#line 9776 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9936 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 420: /* case_body: "'when'" args then compstmt cases  */
-#line 3548 "mrbgems/mruby-compiler/core/parse.y"
+#line 3708 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = cons(cons((yyvsp[-3].nd), (yyvsp[-1].nd)), (yyvsp[0].nd));
                     }
-#line 9784 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9944 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 421: /* cases: opt_else  */
-#line 3554 "mrbgems/mruby-compiler/core/parse.y"
+#line 3714 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if ((yyvsp[0].nd)) {
                         (yyval.nd) = cons(cons(0, (yyvsp[0].nd)), 0);
@@ -9793,60 +9953,60 @@ yyreduce:
                         (yyval.nd) = 0;
                       }
                     }
-#line 9797 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9957 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 423: /* opt_rescue: "'rescue'" exc_list exc_var then compstmt opt_rescue  */
-#line 3568 "mrbgems/mruby-compiler/core/parse.y"
+#line 3728 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1(list3((yyvsp[-4].nd), (yyvsp[-3].nd), (yyvsp[-1].nd)));
                       if ((yyvsp[0].nd)) (yyval.nd) = append((yyval.nd), (yyvsp[0].nd));
                     }
-#line 9806 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9966 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 425: /* exc_list: arg  */
-#line 3576 "mrbgems/mruby-compiler/core/parse.y"
+#line 3736 "mrbgems/mruby-compiler/core/parse.y"
                     {
                         (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 9814 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9974 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 428: /* exc_var: "=>" lhs  */
-#line 3584 "mrbgems/mruby-compiler/core/parse.y"
+#line 3744 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 9822 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9982 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 430: /* opt_ensure: "'ensure'" compstmt  */
-#line 3591 "mrbgems/mruby-compiler/core/parse.y"
+#line 3751 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 9830 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9990 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 437: /* string: string string_fragment  */
-#line 3605 "mrbgems/mruby-compiler/core/parse.y"
+#line 3765 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = concat_string(p, (yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 9838 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9998 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 440: /* string_fragment: "string literal" tSTRING  */
-#line 3613 "mrbgems/mruby-compiler/core/parse.y"
+#line 3773 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 9846 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10006 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 441: /* string_fragment: "string literal" string_rep tSTRING  */
-#line 3617 "mrbgems/mruby-compiler/core/parse.y"
+#line 3777 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       node *n = (yyvsp[-1].nd);
                       if (node_to_int((yyvsp[0].nd)->cdr->cdr) > 0) {
@@ -9857,68 +10017,68 @@ yyreduce:
                       }
                       (yyval.nd) = new_dstr(p, n);
                     }
-#line 9861 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10021 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 443: /* string_rep: string_rep string_interp  */
-#line 3631 "mrbgems/mruby-compiler/core/parse.y"
+#line 3791 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = append((yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 9869 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10029 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 444: /* string_interp: tSTRING_MID  */
-#line 3637 "mrbgems/mruby-compiler/core/parse.y"
+#line 3797 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 9877 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10037 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 445: /* @29: %empty  */
-#line 3641 "mrbgems/mruby-compiler/core/parse.y"
+#line 3801 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push_strterm(p);
                     }
-#line 9885 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10045 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 446: /* string_interp: tSTRING_PART @29 compstmt '}'  */
-#line 3646 "mrbgems/mruby-compiler/core/parse.y"
+#line 3806 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       pop_strterm(p,(yyvsp[-2].nd));
                       (yyval.nd) = list2((yyvsp[-3].nd), (yyvsp[-1].nd));
                     }
-#line 9894 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10054 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 447: /* string_interp: tLITERAL_DELIM  */
-#line 3651 "mrbgems/mruby-compiler/core/parse.y"
+#line 3811 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1(new_literal_delim(p));
                     }
-#line 9902 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10062 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 448: /* string_interp: tHD_LITERAL_DELIM heredoc_bodies  */
-#line 3655 "mrbgems/mruby-compiler/core/parse.y"
+#line 3815 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1(new_literal_delim(p));
                     }
-#line 9910 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10070 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 449: /* xstring: tXSTRING_BEG tXSTRING  */
-#line 3661 "mrbgems/mruby-compiler/core/parse.y"
+#line 3821 "mrbgems/mruby-compiler/core/parse.y"
                     {
                         (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 9918 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10078 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 450: /* xstring: tXSTRING_BEG string_rep tXSTRING  */
-#line 3665 "mrbgems/mruby-compiler/core/parse.y"
+#line 3825 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       node *n = (yyvsp[-1].nd);
                       if (node_to_int((yyvsp[0].nd)->cdr->cdr) > 0) {
@@ -9929,81 +10089,81 @@ yyreduce:
                       }
                       (yyval.nd) = new_dxstr(p, n);
                     }
-#line 9933 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10093 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 451: /* regexp: tREGEXP_BEG tREGEXP  */
-#line 3678 "mrbgems/mruby-compiler/core/parse.y"
+#line 3838 "mrbgems/mruby-compiler/core/parse.y"
                     {
                         (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 9941 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10101 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 452: /* regexp: tREGEXP_BEG string_rep tREGEXP  */
-#line 3682 "mrbgems/mruby-compiler/core/parse.y"
+#line 3842 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_dregx(p, (yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 9949 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10109 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 456: /* heredoc_body: tHEREDOC_END  */
-#line 3695 "mrbgems/mruby-compiler/core/parse.y"
+#line 3855 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       parser_heredoc_info *info = parsing_heredoc_info(p);
                       info->doc = push(info->doc, new_str(p, "", 0));
                       heredoc_end(p);
                     }
-#line 9959 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10119 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 457: /* heredoc_body: heredoc_string_rep tHEREDOC_END  */
-#line 3701 "mrbgems/mruby-compiler/core/parse.y"
+#line 3861 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       heredoc_end(p);
                     }
-#line 9967 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10127 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 460: /* heredoc_string_interp: tHD_STRING_MID  */
-#line 3711 "mrbgems/mruby-compiler/core/parse.y"
+#line 3871 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       parser_heredoc_info *info = parsing_heredoc_info(p);
                       info->doc = push(info->doc, (yyvsp[0].nd));
                       heredoc_treat_nextline(p);
                     }
-#line 9977 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10137 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 461: /* @30: %empty  */
-#line 3717 "mrbgems/mruby-compiler/core/parse.y"
+#line 3877 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push_strterm(p);
                     }
-#line 9985 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10145 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 462: /* heredoc_string_interp: tHD_STRING_PART @30 compstmt '}'  */
-#line 3722 "mrbgems/mruby-compiler/core/parse.y"
+#line 3882 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       pop_strterm(p, (yyvsp[-2].nd));
                       parser_heredoc_info *info = parsing_heredoc_info(p);
                       info->doc = push(push(info->doc, (yyvsp[-3].nd)), (yyvsp[-1].nd));
                     }
-#line 9995 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10155 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 463: /* words: tWORDS_BEG tSTRING  */
-#line 3730 "mrbgems/mruby-compiler/core/parse.y"
+#line 3890 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_words(p, list1((yyvsp[0].nd)));
                     }
-#line 10003 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10163 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 464: /* words: tWORDS_BEG string_rep tSTRING  */
-#line 3734 "mrbgems/mruby-compiler/core/parse.y"
+#line 3894 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       node *n = (yyvsp[-1].nd);
                       if (node_to_int((yyvsp[0].nd)->cdr->cdr) > 0) {
@@ -10014,19 +10174,19 @@ yyreduce:
                       }
                       (yyval.nd) = new_words(p, n);
                     }
-#line 10018 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10178 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 465: /* symbol: basic_symbol  */
-#line 3748 "mrbgems/mruby-compiler/core/parse.y"
+#line 3908 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_sym(p, (yyvsp[0].id));
                     }
-#line 10026 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10186 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 466: /* symbol: "symbol" "string literal" string_rep tSTRING  */
-#line 3752 "mrbgems/mruby-compiler/core/parse.y"
+#line 3912 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       node *n = (yyvsp[-1].nd);
                       p->lstate = EXPR_ENDARG;
@@ -10038,53 +10198,53 @@ yyreduce:
                       }
                       (yyval.nd) = new_dsym(p, new_dstr(p, n));
                     }
-#line 10042 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10202 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 467: /* symbol: "symbol" "numbered parameter"  */
-#line 3764 "mrbgems/mruby-compiler/core/parse.y"
+#line 3924 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       mrb_sym sym = intern_numparam((yyvsp[0].num));
                       (yyval.nd) = new_sym(p, sym);
                     }
-#line 10051 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10211 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 468: /* basic_symbol: "symbol" sym  */
-#line 3771 "mrbgems/mruby-compiler/core/parse.y"
+#line 3931 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->lstate = EXPR_END;
                       (yyval.id) = (yyvsp[0].id);
                     }
-#line 10060 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10220 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 473: /* sym: tSTRING  */
-#line 3782 "mrbgems/mruby-compiler/core/parse.y"
+#line 3942 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.id) = new_strsym(p, (yyvsp[0].nd));
                     }
-#line 10068 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10228 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 474: /* sym: "string literal" tSTRING  */
-#line 3786 "mrbgems/mruby-compiler/core/parse.y"
+#line 3946 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.id) = new_strsym(p, (yyvsp[0].nd));
                     }
-#line 10076 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10236 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 475: /* symbols: tSYMBOLS_BEG tSTRING  */
-#line 3792 "mrbgems/mruby-compiler/core/parse.y"
+#line 3952 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_symbols(p, list1((yyvsp[0].nd)));
                     }
-#line 10084 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10244 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 476: /* symbols: tSYMBOLS_BEG string_rep tSTRING  */
-#line 3796 "mrbgems/mruby-compiler/core/parse.y"
+#line 3956 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       node *n = (yyvsp[-1].nd);
                       if (node_to_int((yyvsp[0].nd)->cdr->cdr) > 0) {
@@ -10092,131 +10252,131 @@ yyreduce:
                       }
                       (yyval.nd) = new_symbols(p, n);
                     }
-#line 10096 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10256 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 479: /* numeric: tUMINUS_NUM "integer literal"  */
-#line 3808 "mrbgems/mruby-compiler/core/parse.y"
+#line 3968 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_negate(p, (yyvsp[0].nd));
                     }
-#line 10104 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10264 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 480: /* numeric: tUMINUS_NUM "float literal"  */
-#line 3812 "mrbgems/mruby-compiler/core/parse.y"
+#line 3972 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_negate(p, (yyvsp[0].nd));
                     }
-#line 10112 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10272 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 481: /* variable: "local variable or method"  */
-#line 3818 "mrbgems/mruby-compiler/core/parse.y"
+#line 3978 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_lvar(p, (yyvsp[0].id));
                     }
-#line 10120 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10280 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 482: /* variable: "instance variable"  */
-#line 3822 "mrbgems/mruby-compiler/core/parse.y"
+#line 3982 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_ivar(p, (yyvsp[0].id));
                     }
-#line 10128 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10288 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 483: /* variable: "global variable"  */
-#line 3826 "mrbgems/mruby-compiler/core/parse.y"
+#line 3986 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_gvar(p, (yyvsp[0].id));
                     }
-#line 10136 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10296 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 484: /* variable: "class variable"  */
-#line 3830 "mrbgems/mruby-compiler/core/parse.y"
+#line 3990 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_cvar(p, (yyvsp[0].id));
                     }
-#line 10144 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10304 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 485: /* variable: "constant"  */
-#line 3834 "mrbgems/mruby-compiler/core/parse.y"
+#line 3994 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_const(p, (yyvsp[0].id));
                     }
-#line 10152 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10312 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 486: /* var_lhs: variable  */
-#line 3840 "mrbgems/mruby-compiler/core/parse.y"
+#line 4000 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       assignable(p, (yyvsp[0].nd));
                     }
-#line 10160 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10320 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 487: /* var_lhs: "numbered parameter"  */
-#line 3844 "mrbgems/mruby-compiler/core/parse.y"
+#line 4004 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[0]), p, "can't assign to numbered parameter");
                     }
-#line 10168 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10328 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 488: /* var_ref: variable  */
-#line 3850 "mrbgems/mruby-compiler/core/parse.y"
+#line 4010 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = var_reference(p, (yyvsp[0].nd));
                     }
-#line 10176 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10336 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 489: /* var_ref: "numbered parameter"  */
-#line 3854 "mrbgems/mruby-compiler/core/parse.y"
+#line 4014 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_nvar(p, (yyvsp[0].num));
                     }
-#line 10184 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10344 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 490: /* var_ref: "'nil'"  */
-#line 3858 "mrbgems/mruby-compiler/core/parse.y"
+#line 4018 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_nil(p);
                     }
-#line 10192 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10352 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 491: /* var_ref: "'self'"  */
-#line 3862 "mrbgems/mruby-compiler/core/parse.y"
+#line 4022 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_self(p);
                     }
-#line 10200 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10360 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 492: /* var_ref: "'true'"  */
-#line 3866 "mrbgems/mruby-compiler/core/parse.y"
+#line 4026 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_true(p);
                     }
-#line 10208 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10368 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 493: /* var_ref: "'false'"  */
-#line 3870 "mrbgems/mruby-compiler/core/parse.y"
+#line 4030 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_false(p);
                     }
-#line 10216 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10376 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 494: /* var_ref: "'__FILE__'"  */
-#line 3874 "mrbgems/mruby-compiler/core/parse.y"
+#line 4034 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       const char *fn = mrb_sym_name_len(p->mrb, p->filename_sym, NULL);
                       if (!fn) {
@@ -10224,686 +10384,686 @@ yyreduce:
                       }
                       (yyval.nd) = new_str(p, fn, strlen(fn));
                     }
-#line 10228 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10388 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 495: /* var_ref: "'__LINE__'"  */
-#line 3882 "mrbgems/mruby-compiler/core/parse.y"
+#line 4042 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       char buf[16];
 
                       dump_int(p->lineno, buf);
                       (yyval.nd) = new_int(p, buf, 10, 0);
                     }
-#line 10239 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10399 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 496: /* var_ref: "'__ENCODING__'"  */
-#line 3889 "mrbgems/mruby-compiler/core/parse.y"
+#line 4049 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_fcall(p, MRB_SYM_2(p->mrb, __ENCODING__), 0);
                     }
-#line 10247 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10407 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 499: /* superclass: %empty  */
-#line 3899 "mrbgems/mruby-compiler/core/parse.y"
+#line 4059 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = 0;
                     }
-#line 10255 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10415 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 500: /* $@31: %empty  */
-#line 3903 "mrbgems/mruby-compiler/core/parse.y"
+#line 4063 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->lstate = EXPR_BEG;
                       p->cmd_start = TRUE;
                     }
-#line 10264 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 501: /* superclass: '<' $@31 expr_value term  */
-#line 3908 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = (yyvsp[-1].nd);
-                    }
-#line 10272 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 504: /* f_arglist_paren: '(' f_args rparen  */
-#line 3924 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = (yyvsp[-1].nd);
-                      p->lstate = EXPR_BEG;
-                      p->cmd_start = TRUE;
-                    }
-#line 10282 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 505: /* f_arglist_paren: '(' f_arg ',' tBDOT3 rparen  */
-#line 3930 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_args_dots(p, (yyvsp[-3].nd));
-                    }
-#line 10290 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 506: /* f_arglist_paren: '(' tBDOT3 rparen  */
-#line 3934 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_args_dots(p, 0);
-                    }
-#line 10298 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 508: /* f_arglist: f_args term  */
-#line 3941 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = (yyvsp[-1].nd);
-                    }
-#line 10306 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 509: /* f_arglist: f_arg ',' tBDOT3 term  */
-#line 3945 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_args_dots(p, (yyvsp[-3].nd));
-                    }
-#line 10314 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 510: /* f_arglist: "..." term  */
-#line 3949 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_args_dots(p, 0);
-                    }
-#line 10322 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 511: /* f_label: "local variable or method" "label"  */
-#line 3955 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      local_nest(p);
-                    }
-#line 10330 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 512: /* f_label: "numbered parameter" "label"  */
-#line 3959 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      local_nest(p);
-                    }
-#line 10338 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 513: /* f_kw: f_label arg  */
-#line 3965 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      void_expr_error(p, (yyvsp[0].nd));
-                      (yyval.nd) = new_kw_arg(p, (yyvsp[-1].id), cons((yyvsp[0].nd), locals_node(p)));
-                      local_unnest(p);
-                    }
-#line 10348 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 514: /* f_kw: f_label  */
-#line 3971 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_kw_arg(p, (yyvsp[0].id), 0);
-                      local_unnest(p);
-                    }
-#line 10357 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 515: /* f_block_kw: f_label primary_value  */
-#line 3978 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      void_expr_error(p, (yyvsp[0].nd));
-                      (yyval.nd) = new_kw_arg(p, (yyvsp[-1].id), cons((yyvsp[0].nd), locals_node(p)));
-                      local_unnest(p);
-                    }
-#line 10367 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 516: /* f_block_kw: f_label  */
-#line 3984 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_kw_arg(p, (yyvsp[0].id), 0);
-                      local_unnest(p);
-                    }
-#line 10376 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 517: /* f_block_kwarg: f_block_kw  */
-#line 3991 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = list1((yyvsp[0].nd));
-                    }
-#line 10384 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 518: /* f_block_kwarg: f_block_kwarg ',' f_block_kw  */
-#line 3995 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
-                    }
-#line 10392 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 519: /* f_kwarg: f_kw  */
-#line 4001 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = list1((yyvsp[0].nd));
-                    }
-#line 10400 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 520: /* f_kwarg: f_kwarg ',' f_kw  */
-#line 4005 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
-                    }
-#line 10408 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 523: /* f_kwrest: kwrest_mark "local variable or method"  */
-#line 4015 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_kw_rest_args(p, (yyvsp[0].id));
-                    }
-#line 10416 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 524: /* f_kwrest: kwrest_mark  */
-#line 4019 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_kw_rest_args(p, 0);
-                    }
 #line 10424 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 525: /* args_tail: f_kwarg ',' f_kwrest opt_f_block_arg  */
-#line 4025 "mrbgems/mruby-compiler/core/parse.y"
+  case 501: /* superclass: '<' $@31 expr_value term  */
+#line 4068 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = new_args_tail(p, (yyvsp[-3].nd), (yyvsp[-1].nd), (yyvsp[0].id));
+                      (yyval.nd) = (yyvsp[-1].nd);
                     }
 #line 10432 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 526: /* args_tail: f_kwarg opt_f_block_arg  */
-#line 4029 "mrbgems/mruby-compiler/core/parse.y"
+  case 504: /* f_arglist_paren: '(' f_args rparen  */
+#line 4084 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = new_args_tail(p, (yyvsp[-1].nd), 0, (yyvsp[0].id));
+                      (yyval.nd) = (yyvsp[-1].nd);
+                      p->lstate = EXPR_BEG;
+                      p->cmd_start = TRUE;
                     }
-#line 10440 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10442 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 527: /* args_tail: f_kwrest opt_f_block_arg  */
-#line 4033 "mrbgems/mruby-compiler/core/parse.y"
+  case 505: /* f_arglist_paren: '(' f_arg ',' tBDOT3 rparen  */
+#line 4090 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = new_args_tail(p, 0, (yyvsp[-1].nd), (yyvsp[0].id));
+                      (yyval.nd) = new_args_dots(p, (yyvsp[-3].nd));
                     }
-#line 10448 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10450 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 528: /* args_tail: f_block_arg  */
-#line 4037 "mrbgems/mruby-compiler/core/parse.y"
+  case 506: /* f_arglist_paren: '(' tBDOT3 rparen  */
+#line 4094 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = new_args_tail(p, 0, 0, (yyvsp[0].id));
+                      (yyval.nd) = new_args_dots(p, 0);
                     }
-#line 10456 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10458 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 529: /* opt_args_tail: ',' args_tail  */
-#line 4043 "mrbgems/mruby-compiler/core/parse.y"
+  case 508: /* f_arglist: f_args term  */
+#line 4101 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = (yyvsp[0].nd);
+                      (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 10464 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10466 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 530: /* opt_args_tail: %empty  */
-#line 4047 "mrbgems/mruby-compiler/core/parse.y"
+  case 509: /* f_arglist: f_arg ',' tBDOT3 term  */
+#line 4105 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = new_args_tail(p, 0, 0, 0);
+                      (yyval.nd) = new_args_dots(p, (yyvsp[-3].nd));
                     }
-#line 10472 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10474 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 531: /* f_args: f_arg ',' f_optarg ',' f_rest_arg opt_args_tail  */
-#line 4053 "mrbgems/mruby-compiler/core/parse.y"
+  case 510: /* f_arglist: "..." term  */
+#line 4109 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = new_args(p, (yyvsp[-5].nd), (yyvsp[-3].nd), (yyvsp[-1].id), 0, (yyvsp[0].nd));
+                      (yyval.nd) = new_args_dots(p, 0);
                     }
-#line 10480 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10482 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 532: /* f_args: f_arg ',' f_optarg ',' f_rest_arg ',' f_arg opt_args_tail  */
-#line 4057 "mrbgems/mruby-compiler/core/parse.y"
+  case 511: /* f_label: "local variable or method" "label"  */
+#line 4115 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = new_args(p, (yyvsp[-7].nd), (yyvsp[-5].nd), (yyvsp[-3].id), (yyvsp[-1].nd), (yyvsp[0].nd));
+                      local_nest(p);
                     }
-#line 10488 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10490 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 533: /* f_args: f_arg ',' f_optarg opt_args_tail  */
-#line 4061 "mrbgems/mruby-compiler/core/parse.y"
+  case 512: /* f_label: "numbered parameter" "label"  */
+#line 4119 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = new_args(p, (yyvsp[-3].nd), (yyvsp[-1].nd), 0, 0, (yyvsp[0].nd));
+                      local_nest(p);
                     }
-#line 10496 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10498 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 534: /* f_args: f_arg ',' f_optarg ',' f_arg opt_args_tail  */
-#line 4065 "mrbgems/mruby-compiler/core/parse.y"
+  case 513: /* f_kw: f_label arg  */
+#line 4125 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = new_args(p, (yyvsp[-5].nd), (yyvsp[-3].nd), 0, (yyvsp[-1].nd), (yyvsp[0].nd));
+                      void_expr_error(p, (yyvsp[0].nd));
+                      (yyval.nd) = new_kw_arg(p, (yyvsp[-1].id), cons((yyvsp[0].nd), locals_node(p)));
+                      local_unnest(p);
                     }
-#line 10504 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10508 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 535: /* f_args: f_arg ',' f_rest_arg opt_args_tail  */
-#line 4069 "mrbgems/mruby-compiler/core/parse.y"
+  case 514: /* f_kw: f_label  */
+#line 4131 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = new_args(p, (yyvsp[-3].nd), 0, (yyvsp[-1].id), 0, (yyvsp[0].nd));
+                      (yyval.nd) = new_kw_arg(p, (yyvsp[0].id), 0);
+                      local_unnest(p);
                     }
-#line 10512 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10517 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 536: /* f_args: f_arg ',' f_rest_arg ',' f_arg opt_args_tail  */
-#line 4073 "mrbgems/mruby-compiler/core/parse.y"
+  case 515: /* f_block_kw: f_label primary_value  */
+#line 4138 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = new_args(p, (yyvsp[-5].nd), 0, (yyvsp[-3].id), (yyvsp[-1].nd), (yyvsp[0].nd));
+                      void_expr_error(p, (yyvsp[0].nd));
+                      (yyval.nd) = new_kw_arg(p, (yyvsp[-1].id), cons((yyvsp[0].nd), locals_node(p)));
+                      local_unnest(p);
                     }
-#line 10520 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10527 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 537: /* f_args: f_arg opt_args_tail  */
-#line 4077 "mrbgems/mruby-compiler/core/parse.y"
+  case 516: /* f_block_kw: f_label  */
+#line 4144 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = new_args(p, (yyvsp[-1].nd), 0, 0, 0, (yyvsp[0].nd));
-                    }
-#line 10528 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 538: /* f_args: f_optarg ',' f_rest_arg opt_args_tail  */
-#line 4081 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_args(p, 0, (yyvsp[-3].nd), (yyvsp[-1].id), 0, (yyvsp[0].nd));
+                      (yyval.nd) = new_kw_arg(p, (yyvsp[0].id), 0);
+                      local_unnest(p);
                     }
 #line 10536 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 539: /* f_args: f_optarg ',' f_rest_arg ',' f_arg opt_args_tail  */
-#line 4085 "mrbgems/mruby-compiler/core/parse.y"
+  case 517: /* f_block_kwarg: f_block_kw  */
+#line 4151 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = new_args(p, 0, (yyvsp[-5].nd), (yyvsp[-3].id), (yyvsp[-1].nd), (yyvsp[0].nd));
+                      (yyval.nd) = list1((yyvsp[0].nd));
                     }
 #line 10544 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 540: /* f_args: f_optarg opt_args_tail  */
-#line 4089 "mrbgems/mruby-compiler/core/parse.y"
+  case 518: /* f_block_kwarg: f_block_kwarg ',' f_block_kw  */
+#line 4155 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = new_args(p, 0, (yyvsp[-1].nd), 0, 0, (yyvsp[0].nd));
+                      (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
 #line 10552 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 541: /* f_args: f_optarg ',' f_arg opt_args_tail  */
-#line 4093 "mrbgems/mruby-compiler/core/parse.y"
+  case 519: /* f_kwarg: f_kw  */
+#line 4161 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = new_args(p, 0, (yyvsp[-3].nd), 0, (yyvsp[-1].nd), (yyvsp[0].nd));
+                      (yyval.nd) = list1((yyvsp[0].nd));
                     }
 #line 10560 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 542: /* f_args: f_rest_arg opt_args_tail  */
-#line 4097 "mrbgems/mruby-compiler/core/parse.y"
+  case 520: /* f_kwarg: f_kwarg ',' f_kw  */
+#line 4165 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = new_args(p, 0, 0, (yyvsp[-1].id), 0, (yyvsp[0].nd));
+                      (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
 #line 10568 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 543: /* f_args: f_rest_arg ',' f_arg opt_args_tail  */
-#line 4101 "mrbgems/mruby-compiler/core/parse.y"
+  case 523: /* f_kwrest: kwrest_mark "local variable or method"  */
+#line 4175 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = new_args(p, 0, 0, (yyvsp[-3].id), (yyvsp[-1].nd), (yyvsp[0].nd));
+                      (yyval.nd) = new_kw_rest_args(p, (yyvsp[0].id));
                     }
 #line 10576 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 544: /* f_args: args_tail  */
-#line 4105 "mrbgems/mruby-compiler/core/parse.y"
+  case 524: /* f_kwrest: kwrest_mark  */
+#line 4179 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = new_args(p, 0, 0, 0, 0, (yyvsp[0].nd));
+                      (yyval.nd) = new_kw_rest_args(p, 0);
                     }
 #line 10584 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
+  case 525: /* args_tail: f_kwarg ',' f_kwrest opt_f_block_arg  */
+#line 4185 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_args_tail(p, (yyvsp[-3].nd), (yyvsp[-1].nd), (yyvsp[0].id));
+                    }
+#line 10592 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 526: /* args_tail: f_kwarg opt_f_block_arg  */
+#line 4189 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_args_tail(p, (yyvsp[-1].nd), 0, (yyvsp[0].id));
+                    }
+#line 10600 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 527: /* args_tail: f_kwrest opt_f_block_arg  */
+#line 4193 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_args_tail(p, 0, (yyvsp[-1].nd), (yyvsp[0].id));
+                    }
+#line 10608 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 528: /* args_tail: f_block_arg  */
+#line 4197 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_args_tail(p, 0, 0, (yyvsp[0].id));
+                    }
+#line 10616 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 529: /* opt_args_tail: ',' args_tail  */
+#line 4203 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = (yyvsp[0].nd);
+                    }
+#line 10624 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 530: /* opt_args_tail: %empty  */
+#line 4207 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_args_tail(p, 0, 0, 0);
+                    }
+#line 10632 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 531: /* f_args: f_arg ',' f_optarg ',' f_rest_arg opt_args_tail  */
+#line 4213 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_args(p, (yyvsp[-5].nd), (yyvsp[-3].nd), (yyvsp[-1].id), 0, (yyvsp[0].nd));
+                    }
+#line 10640 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 532: /* f_args: f_arg ',' f_optarg ',' f_rest_arg ',' f_arg opt_args_tail  */
+#line 4217 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_args(p, (yyvsp[-7].nd), (yyvsp[-5].nd), (yyvsp[-3].id), (yyvsp[-1].nd), (yyvsp[0].nd));
+                    }
+#line 10648 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 533: /* f_args: f_arg ',' f_optarg opt_args_tail  */
+#line 4221 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_args(p, (yyvsp[-3].nd), (yyvsp[-1].nd), 0, 0, (yyvsp[0].nd));
+                    }
+#line 10656 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 534: /* f_args: f_arg ',' f_optarg ',' f_arg opt_args_tail  */
+#line 4225 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_args(p, (yyvsp[-5].nd), (yyvsp[-3].nd), 0, (yyvsp[-1].nd), (yyvsp[0].nd));
+                    }
+#line 10664 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 535: /* f_args: f_arg ',' f_rest_arg opt_args_tail  */
+#line 4229 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_args(p, (yyvsp[-3].nd), 0, (yyvsp[-1].id), 0, (yyvsp[0].nd));
+                    }
+#line 10672 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 536: /* f_args: f_arg ',' f_rest_arg ',' f_arg opt_args_tail  */
+#line 4233 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_args(p, (yyvsp[-5].nd), 0, (yyvsp[-3].id), (yyvsp[-1].nd), (yyvsp[0].nd));
+                    }
+#line 10680 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 537: /* f_args: f_arg opt_args_tail  */
+#line 4237 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_args(p, (yyvsp[-1].nd), 0, 0, 0, (yyvsp[0].nd));
+                    }
+#line 10688 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 538: /* f_args: f_optarg ',' f_rest_arg opt_args_tail  */
+#line 4241 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_args(p, 0, (yyvsp[-3].nd), (yyvsp[-1].id), 0, (yyvsp[0].nd));
+                    }
+#line 10696 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 539: /* f_args: f_optarg ',' f_rest_arg ',' f_arg opt_args_tail  */
+#line 4245 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_args(p, 0, (yyvsp[-5].nd), (yyvsp[-3].id), (yyvsp[-1].nd), (yyvsp[0].nd));
+                    }
+#line 10704 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 540: /* f_args: f_optarg opt_args_tail  */
+#line 4249 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_args(p, 0, (yyvsp[-1].nd), 0, 0, (yyvsp[0].nd));
+                    }
+#line 10712 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 541: /* f_args: f_optarg ',' f_arg opt_args_tail  */
+#line 4253 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_args(p, 0, (yyvsp[-3].nd), 0, (yyvsp[-1].nd), (yyvsp[0].nd));
+                    }
+#line 10720 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 542: /* f_args: f_rest_arg opt_args_tail  */
+#line 4257 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_args(p, 0, 0, (yyvsp[-1].id), 0, (yyvsp[0].nd));
+                    }
+#line 10728 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 543: /* f_args: f_rest_arg ',' f_arg opt_args_tail  */
+#line 4261 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_args(p, 0, 0, (yyvsp[-3].id), (yyvsp[-1].nd), (yyvsp[0].nd));
+                    }
+#line 10736 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 544: /* f_args: args_tail  */
+#line 4265 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_args(p, 0, 0, 0, 0, (yyvsp[0].nd));
+                    }
+#line 10744 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
   case 545: /* f_args: %empty  */
-#line 4109 "mrbgems/mruby-compiler/core/parse.y"
+#line 4269 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_f(p, 0);
                       (yyval.nd) = new_args(p, 0, 0, 0, 0, 0);
                     }
-#line 10593 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10753 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 546: /* f_bad_arg: "constant"  */
-#line 4116 "mrbgems/mruby-compiler/core/parse.y"
+#line 4276 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[0]), p, "formal argument cannot be a constant");
                       (yyval.nd) = 0;
                     }
-#line 10602 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10762 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 547: /* f_bad_arg: "instance variable"  */
-#line 4121 "mrbgems/mruby-compiler/core/parse.y"
+#line 4281 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[0]), p, "formal argument cannot be an instance variable");
                       (yyval.nd) = 0;
                     }
-#line 10611 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10771 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 548: /* f_bad_arg: "global variable"  */
-#line 4126 "mrbgems/mruby-compiler/core/parse.y"
+#line 4286 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[0]), p, "formal argument cannot be a global variable");
                       (yyval.nd) = 0;
                     }
-#line 10620 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10780 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 549: /* f_bad_arg: "class variable"  */
-#line 4131 "mrbgems/mruby-compiler/core/parse.y"
+#line 4291 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[0]), p, "formal argument cannot be a class variable");
                       (yyval.nd) = 0;
                     }
-#line 10629 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10789 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 550: /* f_bad_arg: "numbered parameter"  */
-#line 4136 "mrbgems/mruby-compiler/core/parse.y"
+#line 4296 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[0]), p, "formal argument cannot be a numbered parameter");
                       (yyval.nd) = 0;
                     }
-#line 10638 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10798 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 551: /* f_norm_arg: f_bad_arg  */
-#line 4143 "mrbgems/mruby-compiler/core/parse.y"
+#line 4303 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.id) = 0;
                     }
-#line 10646 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10806 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 552: /* f_norm_arg: "local variable or method"  */
-#line 4147 "mrbgems/mruby-compiler/core/parse.y"
+#line 4307 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_f(p, (yyvsp[0].id));
                       (yyval.id) = (yyvsp[0].id);
                     }
-#line 10655 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10815 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 553: /* f_arg_item: f_norm_arg  */
-#line 4154 "mrbgems/mruby-compiler/core/parse.y"
+#line 4314 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_arg(p, (yyvsp[0].id));
                     }
-#line 10663 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10823 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 554: /* @32: %empty  */
-#line 4158 "mrbgems/mruby-compiler/core/parse.y"
+#line 4318 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = local_switch(p);
                     }
-#line 10671 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10831 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 555: /* f_arg_item: tLPAREN @32 f_margs rparen  */
-#line 4162 "mrbgems/mruby-compiler/core/parse.y"
+#line 4322 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_masgn_param(p, (yyvsp[-1].nd), p->locals->car);
                       local_resume(p, (yyvsp[-2].nd));
                       local_add_f(p, 0);
                     }
-#line 10681 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10841 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 556: /* f_arg: f_arg_item  */
-#line 4170 "mrbgems/mruby-compiler/core/parse.y"
+#line 4330 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 10689 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10849 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 557: /* f_arg: f_arg ',' f_arg_item  */
-#line 4174 "mrbgems/mruby-compiler/core/parse.y"
+#line 4334 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 10697 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10857 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 558: /* f_opt_asgn: "local variable or method" '='  */
-#line 4180 "mrbgems/mruby-compiler/core/parse.y"
+#line 4340 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_f(p, (yyvsp[-1].id));
                       local_nest(p);
                       (yyval.id) = (yyvsp[-1].id);
                     }
-#line 10707 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10867 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 559: /* f_opt: f_opt_asgn arg  */
-#line 4188 "mrbgems/mruby-compiler/core/parse.y"
+#line 4348 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       void_expr_error(p, (yyvsp[0].nd));
                       (yyval.nd) = cons(sym_to_node((yyvsp[-1].id)), cons((yyvsp[0].nd), locals_node(p)));
                       local_unnest(p);
                     }
-#line 10717 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10877 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 560: /* f_block_opt: f_opt_asgn primary_value  */
-#line 4196 "mrbgems/mruby-compiler/core/parse.y"
+#line 4356 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       void_expr_error(p, (yyvsp[0].nd));
                       (yyval.nd) = cons(sym_to_node((yyvsp[-1].id)), cons((yyvsp[0].nd), locals_node(p)));
                       local_unnest(p);
                     }
-#line 10727 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10887 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 561: /* f_block_optarg: f_block_opt  */
-#line 4204 "mrbgems/mruby-compiler/core/parse.y"
+#line 4364 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 10735 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10895 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 562: /* f_block_optarg: f_block_optarg ',' f_block_opt  */
-#line 4208 "mrbgems/mruby-compiler/core/parse.y"
+#line 4368 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 10743 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10903 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 563: /* f_optarg: f_opt  */
-#line 4214 "mrbgems/mruby-compiler/core/parse.y"
+#line 4374 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 10751 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10911 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 564: /* f_optarg: f_optarg ',' f_opt  */
-#line 4218 "mrbgems/mruby-compiler/core/parse.y"
+#line 4378 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 10759 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10919 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 567: /* f_rest_arg: restarg_mark "local variable or method"  */
-#line 4228 "mrbgems/mruby-compiler/core/parse.y"
+#line 4388 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_f(p, (yyvsp[0].id));
                       (yyval.id) = (yyvsp[0].id);
                     }
-#line 10768 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10928 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 568: /* f_rest_arg: restarg_mark  */
-#line 4233 "mrbgems/mruby-compiler/core/parse.y"
+#line 4393 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.id) = intern_op(mul);
                       local_add_f(p, (yyval.id));
                     }
-#line 10777 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10937 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 571: /* f_block_arg: blkarg_mark "local variable or method"  */
-#line 4244 "mrbgems/mruby-compiler/core/parse.y"
+#line 4404 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.id) = (yyvsp[0].id);
                     }
-#line 10785 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10945 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 572: /* f_block_arg: blkarg_mark  */
-#line 4248 "mrbgems/mruby-compiler/core/parse.y"
+#line 4408 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.id) = intern_op(and);
                     }
-#line 10793 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10953 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 573: /* opt_f_block_arg: ',' f_block_arg  */
-#line 4254 "mrbgems/mruby-compiler/core/parse.y"
+#line 4414 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.id) = (yyvsp[0].id);
                     }
-#line 10801 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10961 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 574: /* opt_f_block_arg: none  */
-#line 4258 "mrbgems/mruby-compiler/core/parse.y"
+#line 4418 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.id) = 0;
                     }
-#line 10809 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10969 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 575: /* singleton: var_ref  */
-#line 4264 "mrbgems/mruby-compiler/core/parse.y"
+#line 4424 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       prohibit_literals(p, (yyvsp[0].nd));
                       (yyval.nd) = (yyvsp[0].nd);
                       if (!(yyval.nd)) (yyval.nd) = new_nil(p);
                     }
-#line 10819 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10979 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 576: /* $@33: %empty  */
-#line 4269 "mrbgems/mruby-compiler/core/parse.y"
+#line 4429 "mrbgems/mruby-compiler/core/parse.y"
                       {p->lstate = EXPR_BEG;}
-#line 10825 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10985 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 577: /* singleton: '(' $@33 expr rparen  */
-#line 4270 "mrbgems/mruby-compiler/core/parse.y"
+#line 4430 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       prohibit_literals(p, (yyvsp[-1].nd));
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 10834 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10994 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 579: /* assoc_list: assocs trailer  */
-#line 4278 "mrbgems/mruby-compiler/core/parse.y"
+#line 4438 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 10842 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11002 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 580: /* assocs: assoc  */
-#line 4284 "mrbgems/mruby-compiler/core/parse.y"
+#line 4444 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 10850 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11010 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 581: /* assocs: assocs comma assoc  */
-#line 4288 "mrbgems/mruby-compiler/core/parse.y"
+#line 4448 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 10858 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11018 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 582: /* assoc: arg "=>" arg  */
-#line 4294 "mrbgems/mruby-compiler/core/parse.y"
+#line 4454 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       void_expr_error(p, (yyvsp[-2].nd));
                       void_expr_error(p, (yyvsp[0].nd));
                       (yyval.nd) = cons((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 10868 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11028 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 583: /* assoc: "local variable or method" "label" arg  */
-#line 4300 "mrbgems/mruby-compiler/core/parse.y"
+#line 4460 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       void_expr_error(p, (yyvsp[0].nd));
                       (yyval.nd) = cons(new_sym(p, (yyvsp[-2].id)), (yyvsp[0].nd));
                     }
-#line 10877 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11037 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 584: /* assoc: "local variable or method" "label"  */
-#line 4305 "mrbgems/mruby-compiler/core/parse.y"
+#line 4465 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = cons(new_sym(p, (yyvsp[-1].id)), label_reference(p, (yyvsp[-1].id)));
                     }
-#line 10885 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11045 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 585: /* assoc: "numbered parameter" "label"  */
-#line 4309 "mrbgems/mruby-compiler/core/parse.y"
+#line 4469 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       mrb_sym sym = intern_numparam((yyvsp[-1].num));
                       (yyval.nd) = cons(new_sym(p, sym), label_reference(p, sym));
                     }
-#line 10894 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11054 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 586: /* assoc: "numbered parameter" "label" arg  */
-#line 4314 "mrbgems/mruby-compiler/core/parse.y"
+#line 4474 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       void_expr_error(p, (yyvsp[0].nd));
                       (yyval.nd) = cons(new_sym(p, intern_numparam((yyvsp[-2].num))), (yyvsp[0].nd));
                     }
-#line 10903 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11063 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 587: /* assoc: string_fragment "label" arg  */
-#line 4319 "mrbgems/mruby-compiler/core/parse.y"
+#line 4479 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       void_expr_error(p, (yyvsp[0].nd));
                       if (node_to_type((yyvsp[-2].nd)->car) == NODE_DSTR) {
@@ -10913,75 +11073,75 @@ yyreduce:
                         (yyval.nd) = cons(new_sym(p, new_strsym(p, (yyvsp[-2].nd))), (yyvsp[0].nd));
                       }
                     }
-#line 10917 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11077 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 588: /* assoc: "**" arg  */
-#line 4329 "mrbgems/mruby-compiler/core/parse.y"
+#line 4489 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       void_expr_error(p, (yyvsp[0].nd));
                       (yyval.nd) = cons(new_kw_rest_args(p, 0), (yyvsp[0].nd));
                     }
-#line 10926 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11086 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 589: /* assoc: "**"  */
-#line 4334 "mrbgems/mruby-compiler/core/parse.y"
+#line 4494 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = cons(new_kw_rest_args(p, 0), new_lvar(p, intern_op(pow)));
                     }
-#line 10934 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11094 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 602: /* call_op: '.'  */
-#line 4360 "mrbgems/mruby-compiler/core/parse.y"
+#line 4520 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.num) = '.';
                     }
-#line 10942 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11102 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 603: /* call_op: "&."  */
-#line 4364 "mrbgems/mruby-compiler/core/parse.y"
+#line 4524 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.num) = 0;
                     }
-#line 10950 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11110 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 605: /* call_op2: "::"  */
-#line 4371 "mrbgems/mruby-compiler/core/parse.y"
+#line 4531 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.num) = tCOLON2;
                     }
-#line 10958 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11118 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 614: /* term: ';'  */
-#line 4392 "mrbgems/mruby-compiler/core/parse.y"
+#line 4552 "mrbgems/mruby-compiler/core/parse.y"
                       {yyerrok;}
-#line 10964 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11124 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 616: /* nl: '\n'  */
-#line 4397 "mrbgems/mruby-compiler/core/parse.y"
+#line 4557 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->lineno += (yyvsp[0].num);
                       p->column = 0;
                     }
-#line 10973 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11133 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 620: /* none: %empty  */
-#line 4409 "mrbgems/mruby-compiler/core/parse.y"
+#line 4569 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = 0;
                     }
-#line 10981 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11141 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
 
-#line 10985 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11145 "mrbgems/mruby-compiler/core/y.tab.c"
 
       default: break;
     }
@@ -11214,7 +11374,7 @@ yyreturnlab:
   return yyresult;
 }
 
-#line 4413 "mrbgems/mruby-compiler/core/parse.y"
+#line 4573 "mrbgems/mruby-compiler/core/parse.y"
 
 #define pylval  (*((YYSTYPE*)(p->ylval)))
 
@@ -13760,7 +13920,7 @@ mrb_parser_new(mrb_state *mrb)
     p->var_alloc_counts[i] = 0;
   }
   p->var_total_allocated = 0;
-  p->var_nodes_enabled = FALSE;  /* Start disabled for compatibility */
+  p->var_nodes_enabled = TRUE;   /* Enable variable-sized nodes by default */
 
   return p;
 }