From e02bb13d00f98a2468e09aed97db7084aa43413f Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Wed, 3 Sep 2025 18:11:47 +0900
Subject: [PATCH] mruby-compiler: convert NODE_SUPER and NODE_ZSUPER to always
 use variable-sized nodes

- update NODE_ZSUPER to use mrb_ast_super_node instead of empty mrb_ast_zsuper_node
- convert new_super and new_zsuper to always create variable-sized nodes
- update call_with_block to handle NODE_SUPER/NODE_ZSUPER wrapped in NODE_VARIABLE
- inline codegen_super and codegen_zsuper into their gen_*_var functions
- remove traditional NODE_SUPER and NODE_ZSUPER cases from codegen

Co-authored-by: Claude <noreply@anthropic.com>
---
 mrbgems/mruby-compiler/core/codegen.c |  224 ++-
 mrbgems/mruby-compiler/core/node.h    |    5 +-
 mrbgems/mruby-compiler/core/parse.y   |   58 +-
 mrbgems/mruby-compiler/core/y.tab.c   | 2218 +++++++++++++------------
 4 files changed, 1243 insertions(+), 1262 deletions(-)

diff --git a/mrbgems/mruby-compiler/core/codegen.c b/mrbgems/mruby-compiler/core/codegen.c
index 58a76f4c6..4648cb1f9 100644
--- a/mrbgems/mruby-compiler/core/codegen.c
+++ b/mrbgems/mruby-compiler/core/codegen.c
@@ -4791,110 +4791,6 @@ codegen_block_arg(codegen_scope *s, node *tree, int val)
 }
 
 
-static void
-codegen_super(codegen_scope *s, node *tree, int val)
-{
-  codegen_scope *s2 = s;
-  int lv = 0;
-  int n = 0, nk = 0, st = 0;
-
-  push();
-  while (!s2->mscope) {
-    lv++;
-    s2 = s2->prev;
-    if (!s2) break;
-  }
-  if (tree) {
-    node *args = tree->car;
-    if (args) {
-      st = n = gen_values(s, args, VAL, 14);
-      if (n < 0) {
-        st = 1; n = 15;
-        push();
-      }
-    }
-    /* keyword arguments */
-    if (tree->cdr->car) {
-      nk = gen_hash(s, tree->cdr->car->cdr, VAL, 14);
-      if (nk < 0) {st++; nk = 15;}
-      else st += nk*2;
-      n |= nk<<4;
-    }
-    /* block arguments */
-    if (tree->cdr->cdr) {
-      codegen(s, tree->cdr->cdr, VAL);
-    }
-    else if (s2) gen_blkmove(s, s2->ainfo, lv);
-    else {
-      genop_1(s, OP_LOADNIL, cursp());
-      push();
-    }
-  }
-  else {
-    if (s2) gen_blkmove(s, s2->ainfo, lv);
-    else {
-      genop_1(s, OP_LOADNIL, cursp());
-      push();
-    }
-  }
-  st++;
-  pop_n(st+1);
-  genop_2(s, OP_SUPER, cursp(), n);
-  if (val) push();
-}
-
-static void
-codegen_zsuper(codegen_scope *s, node *tree, int val)
-{
-  codegen_scope *s2 = s;
-  int lv = 0;
-  uint16_t ainfo = 0;
-  int n = CALL_MAXARGS;
-  int sp = cursp();
-
-  push();        /* room for receiver */
-  while (!s2->mscope) {
-    lv++;
-    s2 = s2->prev;
-    if (!s2) break;
-  }
-  if (s2 && s2->ainfo > 0) {
-    ainfo = s2->ainfo;
-  }
-  if (lv > 0xf) codegen_error(s, "too deep nesting");
-  if (ainfo > 0) {
-    genop_2S(s, OP_ARGARY, cursp(), (ainfo<<4)|(lv & 0xf));
-    push(); push(); push();   /* ARGARY pushes 3 values at most */
-    pop(); pop(); pop();
-    /* keyword arguments */
-    if (ainfo & 0x1) {
-      n |= CALL_MAXARGS<<4;
-      push();
-    }
-    /* block argument */
-    if (tree && tree->cdr && tree->cdr->cdr) {
-      push();
-      codegen(s, tree->cdr->cdr, VAL);
-    }
-  }
-  else {
-    /* block argument */
-    if (tree && tree->cdr && tree->cdr->cdr) {
-      codegen(s, tree->cdr->cdr, VAL);
-    }
-    else if (s2) {
-      gen_blkmove(s, 0, lv);
-    }
-    else {
-      genop_1(s, OP_LOADNIL, cursp());
-    }
-    n = 0;
-  }
-  s->sp = sp;
-  genop_2(s, OP_SUPER, cursp(), n);
-  if (val) push();
-}
-
 static void
 codegen_yield(codegen_scope *s, node *tree, int val)
 {
@@ -5330,11 +5226,8 @@ gen_asgn_var(codegen_scope *s, node *varnode, int val)
 static void
 gen_masgn_var(codegen_scope *s, node *varnode, int val)
 {
-  struct mrb_ast_masgn_node *masgn_n = masgn_node(varnode);
-  node *rhs = MASGN_NODE_RHS(masgn_n);
-
   /* Simplified multiple assignment codegen */
-  /* For now, just generate RHS value and then handle LHS assignment */
+  node *rhs = MASGN_NODE_RHS(varnode);
   if (rhs) {
     codegen(s, rhs, VAL);
   }
@@ -5433,10 +5326,55 @@ static void
 gen_super_var(codegen_scope *s, node *varnode, int val)
 {
   struct mrb_ast_super_node *super_n = super_node(varnode);
-  node *args = SUPER_NODE_ARGS(super_n);
+  node *tree = SUPER_NODE_ARGS(super_n);
 
-  /* Use traditional super codegen logic */
-  codegen_super(s, args, val);
+  codegen_scope *s2 = s;
+  int lv = 0;
+  int n = 0, nk = 0, st = 0;
+
+  push();
+  while (!s2->mscope) {
+    lv++;
+    s2 = s2->prev;
+    if (!s2) break;
+  }
+  if (tree) {
+    node *args = tree->car;
+    if (args) {
+      st = n = gen_values(s, args, VAL, 14);
+      if (n < 0) {
+        st = 1; n = 15;
+        push();
+      }
+    }
+    /* keyword arguments */
+    if (tree->cdr->car) {
+      nk = gen_hash(s, tree->cdr->car->cdr, VAL, 14);
+      if (nk < 0) {st++; nk = 15;}
+      else st += nk*2;
+      n |= nk<<4;
+    }
+    /* block arguments */
+    if (tree->cdr->cdr) {
+      codegen(s, tree->cdr->cdr, VAL);
+    }
+    else if (s2) gen_blkmove(s, s2->ainfo, lv);
+    else {
+      genop_1(s, OP_LOADNIL, cursp());
+      push();
+    }
+  }
+  else {
+    if (s2) gen_blkmove(s, s2->ainfo, lv);
+    else {
+      genop_1(s, OP_LOADNIL, cursp());
+      push();
+    }
+  }
+  st++;
+  pop_n(st+1);
+  genop_2(s, OP_SUPER, cursp(), n);
+  if (val) push();
 }
 
 /* Variable-sized literal node generation functions */
@@ -5852,12 +5790,57 @@ gen_fcall_var(codegen_scope *s, node *varnode, int val)
 static void
 gen_zsuper_var(codegen_scope *s, node *varnode, int val)
 {
-  (void)varnode; // suppress unused warning
-  // Create a simple stack structure
-  struct mrb_ast_node stack_node;
-  stack_node.car = (node*)NODE_ZSUPER;
-  stack_node.cdr = NULL;
-  codegen_zsuper(s, &stack_node, val);
+  /* NODE_ZSUPER now uses mrb_ast_super_node, which may have args */
+  struct mrb_ast_super_node *zsuper_n = super_node(varnode);
+  node *tree = zsuper_n->args;  /* May be NULL or args added by call_with_block */
+
+  codegen_scope *s2 = s;
+  int lv = 0;
+  uint16_t ainfo = 0;
+  int n = CALL_MAXARGS;
+  int sp = cursp();
+
+  push();        /* room for receiver */
+  while (!s2->mscope) {
+    lv++;
+    s2 = s2->prev;
+    if (!s2) break;
+  }
+  if (s2 && s2->ainfo > 0) {
+    ainfo = s2->ainfo;
+  }
+  if (lv > 0xf) codegen_error(s, "too deep nesting");
+  if (ainfo > 0) {
+    genop_2S(s, OP_ARGARY, cursp(), (ainfo<<4)|(lv & 0xf));
+    push(); push(); push();   /* ARGARY pushes 3 values at most */
+    pop(); pop(); pop();
+    /* keyword arguments */
+    if (ainfo & 0x1) {
+      n |= CALL_MAXARGS<<4;
+      push();
+    }
+    /* block argument - tree here is args, so check tree->cdr->cdr */
+    if (tree && tree->cdr && tree->cdr->cdr) {
+      push();
+      codegen(s, tree->cdr->cdr, VAL);
+    }
+  }
+  else {
+    /* block argument */
+    if (tree && tree->cdr && tree->cdr->cdr) {
+      codegen(s, tree->cdr->cdr, VAL);
+    }
+    else if (s2) {
+      gen_blkmove(s, 0, lv);
+    }
+    else {
+      genop_1(s, OP_LOADNIL, cursp());
+    }
+    n = 0;
+  }
+  s->sp = sp;
+  genop_2(s, OP_SUPER, cursp(), n);
+  if (val) push();
 }
 
 static void
@@ -6490,13 +6473,6 @@ codegen(codegen_scope *s, node *tree, int val)
     codegen_op_asgn(s, tree, val);
     break;
 
-  case NODE_SUPER:
-    codegen_super(s, tree, val);
-    break;
-
-  case NODE_ZSUPER:
-    codegen_zsuper(s, tree, val);
-    break;
 
   case NODE_RETURN:
     codegen_return(s, tree, val);
diff --git a/mrbgems/mruby-compiler/core/node.h b/mrbgems/mruby-compiler/core/node.h
index 719cbeb3f..cc2b40a43 100644
--- a/mrbgems/mruby-compiler/core/node.h
+++ b/mrbgems/mruby-compiler/core/node.h
@@ -804,9 +804,6 @@ struct mrb_ast_fcall_node {
   struct mrb_ast_node *args;
 };
 
-struct mrb_ast_zsuper_node {
-  struct mrb_ast_var_header hdr;
-};
 
 struct mrb_ast_lambda_node {
   struct mrb_ast_var_header hdr;
@@ -920,7 +917,7 @@ struct mrb_ast_sdef_node {
 };
 
 #define fcall_node(n) ((struct mrb_ast_fcall_node*)(n))
-#define zsuper_node(n) ((struct mrb_ast_zsuper_node*)(n))
+#define zsuper_node(n) ((struct mrb_ast_super_node*)(n))
 #define lambda_node(n) ((struct mrb_ast_lambda_node*)(n))
 #define zarray_node(n) ((struct mrb_ast_zarray_node*)(n))
 #define kw_hash_node(n) ((struct mrb_ast_kw_hash_node*)(n))
diff --git a/mrbgems/mruby-compiler/core/parse.y b/mrbgems/mruby-compiler/core/parse.y
index a5c311748..9370960cb 100644
--- a/mrbgems/mruby-compiler/core/parse.y
+++ b/mrbgems/mruby-compiler/core/parse.y
@@ -612,7 +612,6 @@ static node* new_and_var(parser_state *p, node *left, node *right);
 static node* new_or_var(parser_state *p, node *left, node *right);
 static node* new_return_var(parser_state *p, node *args);
 static node* new_yield_var(parser_state *p, node *args);
-static node* new_super_var(parser_state *p, node *args);
 static node* new_float_var(parser_state *p, const char *value);
 
 /* (:if cond then else) */
@@ -1181,20 +1180,6 @@ new_yield_var(parser_state *p, node *args)
   return cons_head((node*)NODE_VARIABLE, (node*)n);
 }
 
-static node*
-new_super_var(parser_state *p, node *args)
-{
-  size_t total_size = sizeof(struct mrb_ast_super_node);
-  enum mrb_ast_size_class class = size_to_class(total_size);
-
-  struct mrb_ast_super_node *n = (struct mrb_ast_super_node*)parser_alloc_var(p, total_size, class);
-
-  init_var_header(&n->header, p, NODE_SUPER, class);
-  n->args = args;
-
-  return cons_head((node*)NODE_VARIABLE, (node*)n);
-}
-
 /* Variable-sized literal node creation functions */
 
 
@@ -1335,21 +1320,27 @@ new_callargs(parser_state *p, node *a, node *b, node *c)
 static node*
 new_super(parser_state *p, node *c)
 {
-  if (p->var_nodes_enabled) {
-    return new_super_var(p, c);
-  }
-  return cons_head((node*)NODE_SUPER, c);
+  size_t total_size = sizeof(struct mrb_ast_super_node);
+  enum mrb_ast_size_class class = size_to_class(total_size);
+
+  struct mrb_ast_super_node *n = (struct mrb_ast_super_node*)parser_alloc_var(p, total_size, class);
+
+  init_var_header(&n->header, p, NODE_SUPER, class);
+  n->args = c;
+
+  return cons_head((node*)NODE_VARIABLE, (node*)n);
 }
 
 /* (:zsuper) */
 static node*
 new_zsuper(parser_state *p)
 {
-  size_t total_size = sizeof(struct mrb_ast_zsuper_node);
+  size_t total_size = sizeof(struct mrb_ast_super_node);
   enum mrb_ast_size_class class = size_to_class(total_size);
-  struct mrb_ast_zsuper_node *zsuper_node = (struct mrb_ast_zsuper_node*)parser_alloc_var(p, total_size, class);
-  init_var_header(&zsuper_node->hdr, p, NODE_ZSUPER, class);
-  return cons_head((node*)NODE_VARIABLE, (node*)zsuper_node);
+  struct mrb_ast_super_node *n = (struct mrb_ast_super_node*)parser_alloc_var(p, total_size, class);
+  init_var_header(&n->header, p, NODE_ZSUPER, class);
+  n->args = NULL;  /* zsuper initially has no args, but may be added by call_with_block */
+  return cons_head((node*)NODE_VARIABLE, (node*)n);
 }
 
 /* (:yield . c) */
@@ -2317,10 +2308,23 @@ call_with_block(parser_state *p, node *a, node *b)
   node *n;
 
   switch (node_to_type(a->car)) {
-  case NODE_SUPER:
-  case NODE_ZSUPER:
-    if (!a->cdr) a->cdr = new_callargs(p, 0, 0, b);
-    else args_with_block(p, a->cdr, b);
+  case NODE_VARIABLE:
+    /* Handle variable-sized nodes wrapped in NODE_VARIABLE */
+    {
+      enum node_type var_type = VAR_NODE_TYPE(a->cdr);
+      if (var_type == NODE_SUPER || var_type == NODE_ZSUPER) {
+        /* For variable-sized super/zsuper nodes, we need to update the args field directly */
+        struct mrb_ast_super_node *super_n = super_node(a->cdr);
+        if (!super_n->args) {
+          super_n->args = new_callargs(p, 0, 0, b);
+        }
+        else {
+          args_with_block(p, super_n->args, b);
+        }
+        return;
+      }
+    }
+    /* For other variable-sized nodes, fall through to default */
     break;
   case NODE_CALL:
   case NODE_FCALL:
diff --git a/mrbgems/mruby-compiler/core/y.tab.c b/mrbgems/mruby-compiler/core/y.tab.c
index 613fa5f0f..a1f07d79f 100644
--- a/mrbgems/mruby-compiler/core/y.tab.c
+++ b/mrbgems/mruby-compiler/core/y.tab.c
@@ -674,7 +674,6 @@ static node* new_and_var(parser_state *p, node *left, node *right);
 static node* new_or_var(parser_state *p, node *left, node *right);
 static node* new_return_var(parser_state *p, node *args);
 static node* new_yield_var(parser_state *p, node *args);
-static node* new_super_var(parser_state *p, node *args);
 static node* new_float_var(parser_state *p, const char *value);
 
 /* (:if cond then else) */
@@ -1243,20 +1242,6 @@ new_yield_var(parser_state *p, node *args)
   return cons_head((node*)NODE_VARIABLE, (node*)n);
 }
 
-static node*
-new_super_var(parser_state *p, node *args)
-{
-  size_t total_size = sizeof(struct mrb_ast_super_node);
-  enum mrb_ast_size_class class = size_to_class(total_size);
-
-  struct mrb_ast_super_node *n = (struct mrb_ast_super_node*)parser_alloc_var(p, total_size, class);
-
-  init_var_header(&n->header, p, NODE_SUPER, class);
-  n->args = args;
-
-  return cons_head((node*)NODE_VARIABLE, (node*)n);
-}
-
 /* Variable-sized literal node creation functions */
 
 
@@ -1397,21 +1382,27 @@ new_callargs(parser_state *p, node *a, node *b, node *c)
 static node*
 new_super(parser_state *p, node *c)
 {
-  if (p->var_nodes_enabled) {
-    return new_super_var(p, c);
-  }
-  return cons_head((node*)NODE_SUPER, c);
+  size_t total_size = sizeof(struct mrb_ast_super_node);
+  enum mrb_ast_size_class class = size_to_class(total_size);
+
+  struct mrb_ast_super_node *n = (struct mrb_ast_super_node*)parser_alloc_var(p, total_size, class);
+
+  init_var_header(&n->header, p, NODE_SUPER, class);
+  n->args = c;
+
+  return cons_head((node*)NODE_VARIABLE, (node*)n);
 }
 
 /* (:zsuper) */
 static node*
 new_zsuper(parser_state *p)
 {
-  size_t total_size = sizeof(struct mrb_ast_zsuper_node);
+  size_t total_size = sizeof(struct mrb_ast_super_node);
   enum mrb_ast_size_class class = size_to_class(total_size);
-  struct mrb_ast_zsuper_node *zsuper_node = (struct mrb_ast_zsuper_node*)parser_alloc_var(p, total_size, class);
-  init_var_header(&zsuper_node->hdr, p, NODE_ZSUPER, class);
-  return cons_head((node*)NODE_VARIABLE, (node*)zsuper_node);
+  struct mrb_ast_super_node *n = (struct mrb_ast_super_node*)parser_alloc_var(p, total_size, class);
+  init_var_header(&n->header, p, NODE_ZSUPER, class);
+  n->args = NULL;  /* zsuper initially has no args, but may be added by call_with_block */
+  return cons_head((node*)NODE_VARIABLE, (node*)n);
 }
 
 /* (:yield . c) */
@@ -2379,10 +2370,23 @@ call_with_block(parser_state *p, node *a, node *b)
   node *n;
 
   switch (node_to_type(a->car)) {
-  case NODE_SUPER:
-  case NODE_ZSUPER:
-    if (!a->cdr) a->cdr = new_callargs(p, 0, 0, b);
-    else args_with_block(p, a->cdr, b);
+  case NODE_VARIABLE:
+    /* Handle variable-sized nodes wrapped in NODE_VARIABLE */
+    {
+      enum node_type var_type = VAR_NODE_TYPE(a->cdr);
+      if (var_type == NODE_SUPER || var_type == NODE_ZSUPER) {
+        /* For variable-sized super/zsuper nodes, we need to update the args field directly */
+        struct mrb_ast_super_node *super_n = super_node(a->cdr);
+        if (!super_n->args) {
+          super_n->args = new_callargs(p, 0, 0, b);
+        }
+        else {
+          args_with_block(p, super_n->args, b);
+        }
+        return;
+      }
+    }
+    /* For other variable-sized nodes, fall through to default */
     break;
   case NODE_CALL:
   case NODE_FCALL:
@@ -2589,7 +2593,7 @@ prohibit_literals(parser_state *p, node *n)
 /* xxx ----------------------------- */
 
 
-#line 2593 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 2597 "mrbgems/mruby-compiler/core/y.tab.c"
 
 # ifndef YY_CAST
 #  ifdef __cplusplus
@@ -2760,7 +2764,7 @@ extern int yydebug;
 #if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
 union YYSTYPE
 {
-#line 2536 "mrbgems/mruby-compiler/core/parse.y"
+#line 2540 "mrbgems/mruby-compiler/core/parse.y"
 
     node *nd;
     mrb_sym id;
@@ -2768,7 +2772,7 @@ union YYSTYPE
     stack_type stack;
     const struct vtable *vars;
 
-#line 2772 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 2776 "mrbgems/mruby-compiler/core/y.tab.c"
 
 };
 typedef union YYSTYPE YYSTYPE;
@@ -3527,69 +3531,69 @@ static const yytype_uint8 yytranslate[] =
 /* YYRLINE[YYN] -- Source line where rule number YYN was defined.  */
 static const yytype_int16 yyrline[] =
 {
-       0,  2707,  2707,  2707,  2717,  2723,  2727,  2731,  2735,  2741,
-    2743,  2742,  2756,  2782,  2788,  2792,  2796,  2800,  2806,  2806,
-    2810,  2814,  2818,  2822,  2831,  2840,  2844,  2849,  2850,  2854,
-    2858,  2862,  2866,  2872,  2875,  2879,  2883,  2887,  2891,  2895,
-    2900,  2904,  2913,  2922,  2931,  2940,  2947,  2948,  2952,  2956,
-    2957,  2961,  2965,  2969,  2973,  2977,  2987,  2986,  3001,  3010,
-    3011,  3014,  3015,  3022,  3021,  3036,  3040,  3045,  3049,  3054,
-    3058,  3063,  3067,  3071,  3075,  3079,  3085,  3089,  3095,  3096,
-    3102,  3106,  3110,  3114,  3118,  3122,  3126,  3130,  3134,  3138,
-    3144,  3145,  3151,  3155,  3161,  3165,  3171,  3175,  3179,  3183,
-    3187,  3191,  3197,  3203,  3210,  3214,  3218,  3222,  3226,  3230,
-    3236,  3242,  3247,  3253,  3257,  3260,  3264,  3268,  3275,  3276,
-    3277,  3278,  3283,  3290,  3291,  3294,  3298,  3298,  3304,  3305,
-    3306,  3307,  3308,  3309,  3310,  3311,  3312,  3313,  3314,  3315,
-    3316,  3317,  3318,  3319,  3320,  3321,  3322,  3323,  3324,  3325,
-    3326,  3327,  3328,  3329,  3330,  3331,  3332,  3333,  3336,  3336,
-    3336,  3337,  3337,  3338,  3338,  3338,  3339,  3339,  3339,  3339,
-    3340,  3340,  3340,  3341,  3341,  3341,  3342,  3342,  3342,  3342,
-    3343,  3343,  3343,  3343,  3344,  3344,  3344,  3344,  3345,  3345,
-    3345,  3345,  3346,  3346,  3346,  3346,  3347,  3347,  3350,  3354,
-    3358,  3362,  3366,  3370,  3374,  3379,  3384,  3389,  3393,  3397,
-    3401,  3405,  3409,  3413,  3417,  3421,  3425,  3429,  3433,  3437,
-    3441,  3445,  3449,  3453,  3457,  3461,  3465,  3469,  3473,  3477,
-    3481,  3485,  3489,  3493,  3497,  3501,  3505,  3509,  3513,  3517,
-    3521,  3525,  3529,  3533,  3537,  3546,  3555,  3564,  3573,  3579,
-    3580,  3584,  3588,  3594,  3598,  3605,  3609,  3618,  3635,  3636,
-    3639,  3640,  3641,  3645,  3649,  3655,  3660,  3664,  3668,  3672,
-    3678,  3678,  3689,  3693,  3699,  3703,  3709,  3712,  3717,  3721,
-    3725,  3730,  3734,  3740,  3745,  3749,  3755,  3756,  3760,  3764,
-    3765,  3766,  3767,  3768,  3773,  3772,  3784,  3788,  3783,  3793,
-    3793,  3797,  3801,  3805,  3809,  3813,  3817,  3821,  3825,  3829,
-    3833,  3837,  3838,  3844,  3851,  3843,  3864,  3872,  3880,  3880,
-    3880,  3887,  3887,  3887,  3894,  3900,  3905,  3907,  3904,  3916,
-    3914,  3932,  3937,  3930,  3954,  3952,  3968,  3978,  3989,  3993,
-    3997,  4001,  4007,  4014,  4015,  4016,  4019,  4020,  4023,  4024,
-    4032,  4033,  4039,  4043,  4046,  4050,  4054,  4058,  4063,  4067,
-    4071,  4075,  4081,  4080,  4090,  4094,  4098,  4102,  4108,  4113,
-    4118,  4122,  4126,  4130,  4134,  4138,  4142,  4146,  4150,  4154,
-    4158,  4162,  4166,  4170,  4174,  4180,  4185,  4192,  4192,  4196,
-    4201,  4208,  4212,  4218,  4219,  4222,  4227,  4230,  4234,  4240,
-    4244,  4251,  4250,  4267,  4277,  4281,  4286,  4293,  4297,  4301,
-    4305,  4309,  4313,  4317,  4321,  4325,  4332,  4331,  4346,  4345,
-    4361,  4369,  4378,  4381,  4388,  4391,  4395,  4396,  4399,  4403,
-    4406,  4410,  4413,  4414,  4415,  4416,  4419,  4420,  4426,  4431,
-    4436,  4441,  4447,  4448,  4454,  4460,  4459,  4471,  4475,  4481,
-    4485,  4491,  4500,  4511,  4514,  4515,  4518,  4524,  4530,  4531,
-    4534,  4541,  4540,  4555,  4559,  4568,  4572,  4584,  4591,  4598,
-    4599,  4600,  4601,  4602,  4606,  4612,  4616,  4624,  4625,  4626,
-    4630,  4636,  4640,  4644,  4648,  4652,  4658,  4662,  4668,  4672,
-    4676,  4680,  4684,  4688,  4692,  4700,  4707,  4713,  4714,  4718,
-    4722,  4721,  4738,  4739,  4742,  4748,  4752,  4758,  4759,  4763,
-    4767,  4773,  4777,  4783,  4789,  4796,  4802,  4809,  4813,  4819,
-    4823,  4829,  4830,  4833,  4837,  4843,  4847,  4851,  4855,  4861,
-    4866,  4871,  4875,  4879,  4883,  4887,  4891,  4895,  4899,  4903,
-    4907,  4911,  4915,  4919,  4923,  4928,  4934,  4939,  4944,  4949,
-    4954,  4961,  4965,  4972,  4977,  4976,  4988,  4992,  4998,  5006,
-    5014,  5022,  5026,  5032,  5036,  5042,  5043,  5046,  5051,  5058,
-    5059,  5062,  5066,  5072,  5076,  5082,  5088,  5088,  5095,  5096,
-    5102,  5106,  5112,  5118,  5123,  5127,  5132,  5137,  5153,  5158,
-    5164,  5165,  5166,  5169,  5170,  5171,  5172,  5175,  5176,  5177,
-    5180,  5181,  5184,  5188,  5194,  5195,  5201,  5202,  5205,  5206,
-    5209,  5212,  5213,  5214,  5217,  5218,  5221,  5226,  5229,  5230,
-    5234
+       0,  2711,  2711,  2711,  2721,  2727,  2731,  2735,  2739,  2745,
+    2747,  2746,  2760,  2786,  2792,  2796,  2800,  2804,  2810,  2810,
+    2814,  2818,  2822,  2826,  2835,  2844,  2848,  2853,  2854,  2858,
+    2862,  2866,  2870,  2876,  2879,  2883,  2887,  2891,  2895,  2899,
+    2904,  2908,  2917,  2926,  2935,  2944,  2951,  2952,  2956,  2960,
+    2961,  2965,  2969,  2973,  2977,  2981,  2991,  2990,  3005,  3014,
+    3015,  3018,  3019,  3026,  3025,  3040,  3044,  3049,  3053,  3058,
+    3062,  3067,  3071,  3075,  3079,  3083,  3089,  3093,  3099,  3100,
+    3106,  3110,  3114,  3118,  3122,  3126,  3130,  3134,  3138,  3142,
+    3148,  3149,  3155,  3159,  3165,  3169,  3175,  3179,  3183,  3187,
+    3191,  3195,  3201,  3207,  3214,  3218,  3222,  3226,  3230,  3234,
+    3240,  3246,  3251,  3257,  3261,  3264,  3268,  3272,  3279,  3280,
+    3281,  3282,  3287,  3294,  3295,  3298,  3302,  3302,  3308,  3309,
+    3310,  3311,  3312,  3313,  3314,  3315,  3316,  3317,  3318,  3319,
+    3320,  3321,  3322,  3323,  3324,  3325,  3326,  3327,  3328,  3329,
+    3330,  3331,  3332,  3333,  3334,  3335,  3336,  3337,  3340,  3340,
+    3340,  3341,  3341,  3342,  3342,  3342,  3343,  3343,  3343,  3343,
+    3344,  3344,  3344,  3345,  3345,  3345,  3346,  3346,  3346,  3346,
+    3347,  3347,  3347,  3347,  3348,  3348,  3348,  3348,  3349,  3349,
+    3349,  3349,  3350,  3350,  3350,  3350,  3351,  3351,  3354,  3358,
+    3362,  3366,  3370,  3374,  3378,  3383,  3388,  3393,  3397,  3401,
+    3405,  3409,  3413,  3417,  3421,  3425,  3429,  3433,  3437,  3441,
+    3445,  3449,  3453,  3457,  3461,  3465,  3469,  3473,  3477,  3481,
+    3485,  3489,  3493,  3497,  3501,  3505,  3509,  3513,  3517,  3521,
+    3525,  3529,  3533,  3537,  3541,  3550,  3559,  3568,  3577,  3583,
+    3584,  3588,  3592,  3598,  3602,  3609,  3613,  3622,  3639,  3640,
+    3643,  3644,  3645,  3649,  3653,  3659,  3664,  3668,  3672,  3676,
+    3682,  3682,  3693,  3697,  3703,  3707,  3713,  3716,  3721,  3725,
+    3729,  3734,  3738,  3744,  3749,  3753,  3759,  3760,  3764,  3768,
+    3769,  3770,  3771,  3772,  3777,  3776,  3788,  3792,  3787,  3797,
+    3797,  3801,  3805,  3809,  3813,  3817,  3821,  3825,  3829,  3833,
+    3837,  3841,  3842,  3848,  3855,  3847,  3868,  3876,  3884,  3884,
+    3884,  3891,  3891,  3891,  3898,  3904,  3909,  3911,  3908,  3920,
+    3918,  3936,  3941,  3934,  3958,  3956,  3972,  3982,  3993,  3997,
+    4001,  4005,  4011,  4018,  4019,  4020,  4023,  4024,  4027,  4028,
+    4036,  4037,  4043,  4047,  4050,  4054,  4058,  4062,  4067,  4071,
+    4075,  4079,  4085,  4084,  4094,  4098,  4102,  4106,  4112,  4117,
+    4122,  4126,  4130,  4134,  4138,  4142,  4146,  4150,  4154,  4158,
+    4162,  4166,  4170,  4174,  4178,  4184,  4189,  4196,  4196,  4200,
+    4205,  4212,  4216,  4222,  4223,  4226,  4231,  4234,  4238,  4244,
+    4248,  4255,  4254,  4271,  4281,  4285,  4290,  4297,  4301,  4305,
+    4309,  4313,  4317,  4321,  4325,  4329,  4336,  4335,  4350,  4349,
+    4365,  4373,  4382,  4385,  4392,  4395,  4399,  4400,  4403,  4407,
+    4410,  4414,  4417,  4418,  4419,  4420,  4423,  4424,  4430,  4435,
+    4440,  4445,  4451,  4452,  4458,  4464,  4463,  4475,  4479,  4485,
+    4489,  4495,  4504,  4515,  4518,  4519,  4522,  4528,  4534,  4535,
+    4538,  4545,  4544,  4559,  4563,  4572,  4576,  4588,  4595,  4602,
+    4603,  4604,  4605,  4606,  4610,  4616,  4620,  4628,  4629,  4630,
+    4634,  4640,  4644,  4648,  4652,  4656,  4662,  4666,  4672,  4676,
+    4680,  4684,  4688,  4692,  4696,  4704,  4711,  4717,  4718,  4722,
+    4726,  4725,  4742,  4743,  4746,  4752,  4756,  4762,  4763,  4767,
+    4771,  4777,  4781,  4787,  4793,  4800,  4806,  4813,  4817,  4823,
+    4827,  4833,  4834,  4837,  4841,  4847,  4851,  4855,  4859,  4865,
+    4870,  4875,  4879,  4883,  4887,  4891,  4895,  4899,  4903,  4907,
+    4911,  4915,  4919,  4923,  4927,  4932,  4938,  4943,  4948,  4953,
+    4958,  4965,  4969,  4976,  4981,  4980,  4992,  4996,  5002,  5010,
+    5018,  5026,  5030,  5036,  5040,  5046,  5047,  5050,  5055,  5062,
+    5063,  5066,  5070,  5076,  5080,  5086,  5092,  5092,  5099,  5100,
+    5106,  5110,  5116,  5122,  5127,  5131,  5136,  5141,  5157,  5162,
+    5168,  5169,  5170,  5173,  5174,  5175,  5176,  5179,  5180,  5181,
+    5184,  5185,  5188,  5192,  5198,  5199,  5205,  5206,  5209,  5210,
+    5213,  5216,  5217,  5218,  5221,  5222,  5225,  5230,  5233,  5234,
+    5238
 };
 #endif
 
@@ -7566,7 +7570,7 @@ YYLTYPE yylloc = yyloc_default;
 
 
 
-#line 7570 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7574 "mrbgems/mruby-compiler/core/y.tab.c"
 
   yylsp[0] = yylloc;
   goto yysetstate;
@@ -7779,84 +7783,84 @@ yyreduce:
   switch (yyn)
     {
   case 2: /* $@1: %empty  */
-#line 2707 "mrbgems/mruby-compiler/core/parse.y"
+#line 2711 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->lstate = EXPR_BEG;
                       if (!p->locals) p->locals = cons(0,0);
                     }
-#line 7788 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7792 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 3: /* program: $@1 top_compstmt  */
-#line 2712 "mrbgems/mruby-compiler/core/parse.y"
+#line 2716 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->tree = new_scope(p, (yyvsp[0].nd));
                     }
-#line 7796 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7800 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 4: /* top_compstmt: top_stmts opt_terms  */
-#line 2718 "mrbgems/mruby-compiler/core/parse.y"
+#line 2722 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 7804 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7808 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 5: /* top_stmts: none  */
-#line 2724 "mrbgems/mruby-compiler/core/parse.y"
+#line 2728 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_stmts(p, 0);
                     }
-#line 7812 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7816 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 6: /* top_stmts: top_stmt  */
-#line 2728 "mrbgems/mruby-compiler/core/parse.y"
+#line 2732 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_stmts(p, (yyvsp[0].nd));
                     }
-#line 7820 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7824 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 7: /* top_stmts: top_stmts terms top_stmt  */
-#line 2732 "mrbgems/mruby-compiler/core/parse.y"
+#line 2736 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-2].nd), newline_node((yyvsp[0].nd)));
                     }
-#line 7828 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7832 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 8: /* top_stmts: error top_stmt  */
-#line 2736 "mrbgems/mruby-compiler/core/parse.y"
+#line 2740 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_stmts(p, 0);
                     }
-#line 7836 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7840 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 10: /* @2: %empty  */
-#line 2743 "mrbgems/mruby-compiler/core/parse.y"
+#line 2747 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = local_switch(p);
                       nvars_block(p);
                     }
-#line 7845 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7849 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 11: /* top_stmt: "'BEGIN'" @2 '{' top_compstmt '}'  */
-#line 2748 "mrbgems/mruby-compiler/core/parse.y"
+#line 2752 "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 7856 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7860 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 12: /* bodystmt: compstmt opt_rescue opt_else opt_ensure  */
-#line 2760 "mrbgems/mruby-compiler/core/parse.y"
+#line 2764 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if ((yyvsp[-2].nd)) {
                         (yyval.nd) = new_rescue(p, (yyvsp[-3].nd), (yyvsp[-2].nd), (yyvsp[-1].nd));
@@ -7877,89 +7881,89 @@ yyreduce:
                         }
                       }
                     }
-#line 7881 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7885 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 13: /* compstmt: stmts opt_terms  */
-#line 2783 "mrbgems/mruby-compiler/core/parse.y"
+#line 2787 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 7889 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7893 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 14: /* stmts: none  */
-#line 2789 "mrbgems/mruby-compiler/core/parse.y"
+#line 2793 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_stmts(p, 0);
                     }
-#line 7897 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7901 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 15: /* stmts: stmt  */
-#line 2793 "mrbgems/mruby-compiler/core/parse.y"
+#line 2797 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_stmts(p, (yyvsp[0].nd));
                     }
-#line 7905 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7909 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 16: /* stmts: stmts terms stmt  */
-#line 2797 "mrbgems/mruby-compiler/core/parse.y"
+#line 2801 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-2].nd), newline_node((yyvsp[0].nd)));
                     }
-#line 7913 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7917 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 17: /* stmts: error stmt  */
-#line 2801 "mrbgems/mruby-compiler/core/parse.y"
+#line 2805 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_stmts(p, (yyvsp[0].nd));
                     }
-#line 7921 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7925 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 18: /* $@3: %empty  */
-#line 2806 "mrbgems/mruby-compiler/core/parse.y"
+#line 2810 "mrbgems/mruby-compiler/core/parse.y"
                                      {p->lstate = EXPR_FNAME;}
-#line 7927 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7931 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 19: /* stmt: "'alias'" fsym $@3 fsym  */
-#line 2807 "mrbgems/mruby-compiler/core/parse.y"
+#line 2811 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_alias(p, (yyvsp[-2].id), (yyvsp[0].id));
                     }
-#line 7935 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7939 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 20: /* stmt: "'undef'" undef_list  */
-#line 2811 "mrbgems/mruby-compiler/core/parse.y"
+#line 2815 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_undef(p, (yyvsp[0].nd));
                     }
-#line 7943 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7947 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 21: /* stmt: stmt "'if' modifier" expr_value  */
-#line 2815 "mrbgems/mruby-compiler/core/parse.y"
+#line 2819 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_if(p, cond((yyvsp[0].nd)), (yyvsp[-2].nd), 0);
                     }
-#line 7951 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7955 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 22: /* stmt: stmt "'unless' modifier" expr_value  */
-#line 2819 "mrbgems/mruby-compiler/core/parse.y"
+#line 2823 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_unless(p, cond((yyvsp[0].nd)), (yyvsp[-2].nd), 0);
                     }
-#line 7959 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7963 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 23: /* stmt: stmt "'while' modifier" expr_value  */
-#line 2823 "mrbgems/mruby-compiler/core/parse.y"
+#line 2827 "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));
@@ -7968,11 +7972,11 @@ yyreduce:
                         (yyval.nd) = new_while(p, cond((yyvsp[0].nd)), (yyvsp[-2].nd));
                       }
                     }
-#line 7972 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7976 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 24: /* stmt: stmt "'until' modifier" expr_value  */
-#line 2832 "mrbgems/mruby-compiler/core/parse.y"
+#line 2836 "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));
@@ -7981,127 +7985,127 @@ yyreduce:
                         (yyval.nd) = new_until(p, cond((yyvsp[0].nd)), (yyvsp[-2].nd));
                       }
                     }
-#line 7985 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7989 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 25: /* stmt: stmt "'rescue' modifier" stmt  */
-#line 2841 "mrbgems/mruby-compiler/core/parse.y"
+#line 2845 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_mod_rescue(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 7993 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7997 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 26: /* stmt: "'END'" '{' compstmt '}'  */
-#line 2845 "mrbgems/mruby-compiler/core/parse.y"
+#line 2849 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[-3]), p, "END not supported");
                       (yyval.nd) = new_postexe(p, (yyvsp[-1].nd));
                     }
-#line 8002 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8006 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 28: /* stmt: mlhs '=' command_call  */
-#line 2851 "mrbgems/mruby-compiler/core/parse.y"
+#line 2855 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_masgn(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 8010 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8014 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 29: /* stmt: lhs '=' mrhs  */
-#line 2855 "mrbgems/mruby-compiler/core/parse.y"
+#line 2859 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_asgn(p, (yyvsp[-2].nd), new_array(p, (yyvsp[0].nd)));
                     }
-#line 8018 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8022 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 30: /* stmt: mlhs '=' arg  */
-#line 2859 "mrbgems/mruby-compiler/core/parse.y"
+#line 2863 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_masgn(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 8026 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8030 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 31: /* stmt: mlhs '=' mrhs  */
-#line 2863 "mrbgems/mruby-compiler/core/parse.y"
+#line 2867 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_masgn(p, (yyvsp[-2].nd), new_array(p, (yyvsp[0].nd)));
                     }
-#line 8034 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8038 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 32: /* stmt: arg "=>" "local variable or method"  */
-#line 2867 "mrbgems/mruby-compiler/core/parse.y"
+#line 2871 "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 8044 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8048 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 34: /* command_asgn: lhs '=' command_rhs  */
-#line 2876 "mrbgems/mruby-compiler/core/parse.y"
+#line 2880 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_asgn(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 8052 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8056 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 35: /* command_asgn: var_lhs tOP_ASGN command_rhs  */
-#line 2880 "mrbgems/mruby-compiler/core/parse.y"
+#line 2884 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_op_asgn(p, (yyvsp[-2].nd), (yyvsp[-1].id), (yyvsp[0].nd));
                     }
-#line 8060 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8064 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 36: /* command_asgn: primary_value '[' opt_call_args ']' tOP_ASGN command_rhs  */
-#line 2884 "mrbgems/mruby-compiler/core/parse.y"
+#line 2888 "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 8068 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8072 "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 2888 "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 8076 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 38: /* command_asgn: primary_value call_op "constant" tOP_ASGN command_rhs  */
 #line 2892 "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 8084 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8080 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 38: /* command_asgn: primary_value call_op "constant" tOP_ASGN command_rhs  */
+#line 2896 "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 8088 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 39: /* command_asgn: primary_value "::" "constant" tOP_ASGN command_call  */
-#line 2896 "mrbgems/mruby-compiler/core/parse.y"
+#line 2900 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[-4]), p, "constant re-assignment");
                       (yyval.nd) = 0;
                     }
-#line 8093 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8097 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 40: /* command_asgn: primary_value "::" "local variable or method" tOP_ASGN command_rhs  */
-#line 2901 "mrbgems/mruby-compiler/core/parse.y"
+#line 2905 "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 8101 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8105 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 41: /* command_asgn: defn_head f_opt_arglist_paren '=' command  */
-#line 2905 "mrbgems/mruby-compiler/core/parse.y"
+#line 2909 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-3].nd);
                       endless_method_name(p, (yyvsp[-3].nd));
@@ -8110,11 +8114,11 @@ yyreduce:
                       nvars_unnest(p);
                       p->in_def--;
                     }
-#line 8114 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8118 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 42: /* command_asgn: defn_head f_opt_arglist_paren '=' command "'rescue' modifier" arg  */
-#line 2914 "mrbgems/mruby-compiler/core/parse.y"
+#line 2918 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-5].nd);
                       endless_method_name(p, (yyvsp[-5].nd));
@@ -8123,11 +8127,11 @@ yyreduce:
                       nvars_unnest(p);
                       p->in_def--;
                     }
-#line 8127 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8131 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 43: /* command_asgn: defs_head f_opt_arglist_paren '=' command  */
-#line 2923 "mrbgems/mruby-compiler/core/parse.y"
+#line 2927 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-3].nd);
                       void_expr_error(p, (yyvsp[0].nd));
@@ -8136,11 +8140,11 @@ yyreduce:
                       p->in_def--;
                       p->in_single--;
                     }
-#line 8140 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8144 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 44: /* command_asgn: defs_head f_opt_arglist_paren '=' command "'rescue' modifier" arg  */
-#line 2932 "mrbgems/mruby-compiler/core/parse.y"
+#line 2936 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-5].nd);
                       void_expr_error(p, (yyvsp[-2].nd));
@@ -8149,79 +8153,79 @@ yyreduce:
                       p->in_def--;
                       p->in_single--;
                     }
-#line 8153 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8157 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 45: /* command_asgn: backref tOP_ASGN command_rhs  */
-#line 2941 "mrbgems/mruby-compiler/core/parse.y"
+#line 2945 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       backref_error(p, (yyvsp[-2].nd));
                       (yyval.nd) = new_stmts(p, 0);
                     }
-#line 8162 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8166 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 47: /* command_rhs: command_call "'rescue' modifier" stmt  */
-#line 2949 "mrbgems/mruby-compiler/core/parse.y"
+#line 2953 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_mod_rescue(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 8170 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8174 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 50: /* expr: expr "'and'" expr  */
-#line 2958 "mrbgems/mruby-compiler/core/parse.y"
+#line 2962 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_and(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 8178 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8182 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 51: /* expr: expr "'or'" expr  */
-#line 2962 "mrbgems/mruby-compiler/core/parse.y"
+#line 2966 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_or(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 8186 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8190 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 52: /* expr: "'not'" opt_nl expr  */
-#line 2966 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = call_uni_op(p, cond((yyvsp[0].nd)), "!");
-                    }
-#line 8194 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 53: /* expr: '!' command_call  */
 #line 2970 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_uni_op(p, cond((yyvsp[0].nd)), "!");
                     }
-#line 8202 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8198 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 53: /* expr: '!' command_call  */
+#line 2974 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = call_uni_op(p, cond((yyvsp[0].nd)), "!");
+                    }
+#line 8206 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 55: /* defn_head: "'def'" fname  */
-#line 2978 "mrbgems/mruby-compiler/core/parse.y"
+#line 2982 "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 8213 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8217 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 56: /* $@4: %empty  */
-#line 2987 "mrbgems/mruby-compiler/core/parse.y"
+#line 2991 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->lstate = EXPR_FNAME;
                     }
-#line 8221 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8225 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 57: /* defs_head: "'def'" singleton dot_or_colon $@4 fname  */
-#line 2991 "mrbgems/mruby-compiler/core/parse.y"
+#line 2995 "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;
@@ -8230,1054 +8234,1054 @@ yyreduce:
                       nvars_block(p);
                       p->lstate = EXPR_ENDFN; /* force for args */
                     }
-#line 8234 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8238 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 58: /* expr_value: expr  */
-#line 3002 "mrbgems/mruby-compiler/core/parse.y"
+#line 3006 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if (!(yyvsp[0].nd)) (yyval.nd) = new_nil(p);
                       else {
                         (yyval.nd) = (yyvsp[0].nd);
                       }
                     }
-#line 8245 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8249 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 62: /* block_command: block_call call_op2 operation2 command_args  */
-#line 3016 "mrbgems/mruby-compiler/core/parse.y"
+#line 3020 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), (yyvsp[-1].id), (yyvsp[0].nd), (yyvsp[-2].num));
                     }
-#line 8253 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8257 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 63: /* $@5: %empty  */
-#line 3022 "mrbgems/mruby-compiler/core/parse.y"
+#line 3026 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_nest(p);
                       nvars_nest(p);
                     }
-#line 8262 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8266 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 64: /* cmd_brace_block: "{" $@5 opt_block_param compstmt '}'  */
-#line 3029 "mrbgems/mruby-compiler/core/parse.y"
+#line 3033 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_block(p, (yyvsp[-2].nd), (yyvsp[-1].nd));
                       local_unnest(p);
                       nvars_unnest(p);
                     }
-#line 8272 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8276 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 65: /* command: operation command_args  */
-#line 3037 "mrbgems/mruby-compiler/core/parse.y"
+#line 3041 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_fcall(p, (yyvsp[-1].id), (yyvsp[0].nd));
                     }
-#line 8280 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8284 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 66: /* command: operation command_args cmd_brace_block  */
-#line 3041 "mrbgems/mruby-compiler/core/parse.y"
+#line 3045 "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 8289 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8293 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 67: /* command: primary_value call_op operation2 command_args  */
-#line 3046 "mrbgems/mruby-compiler/core/parse.y"
+#line 3050 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), (yyvsp[-1].id), (yyvsp[0].nd), (yyvsp[-2].num));
                     }
-#line 8297 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8301 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 68: /* command: primary_value call_op operation2 command_args cmd_brace_block  */
-#line 3050 "mrbgems/mruby-compiler/core/parse.y"
+#line 3054 "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 8306 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8310 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 69: /* command: primary_value "::" operation2 command_args  */
-#line 3055 "mrbgems/mruby-compiler/core/parse.y"
+#line 3059 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), (yyvsp[-1].id), (yyvsp[0].nd), tCOLON2);
                     }
-#line 8314 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8318 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 70: /* command: primary_value "::" operation2 command_args cmd_brace_block  */
-#line 3059 "mrbgems/mruby-compiler/core/parse.y"
+#line 3063 "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 8323 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8327 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 71: /* command: "'super'" command_args  */
-#line 3064 "mrbgems/mruby-compiler/core/parse.y"
+#line 3068 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_super(p, (yyvsp[0].nd));
                     }
-#line 8331 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8335 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 72: /* command: "'yield'" command_args  */
-#line 3068 "mrbgems/mruby-compiler/core/parse.y"
+#line 3072 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_yield(p, (yyvsp[0].nd));
                     }
-#line 8339 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8343 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 73: /* command: "'return'" call_args  */
-#line 3072 "mrbgems/mruby-compiler/core/parse.y"
+#line 3076 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_return(p, ret_args(p, (yyvsp[0].nd)));
                     }
-#line 8347 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8351 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 74: /* command: "'break'" call_args  */
-#line 3076 "mrbgems/mruby-compiler/core/parse.y"
+#line 3080 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_break(p, ret_args(p, (yyvsp[0].nd)));
                     }
-#line 8355 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8359 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 75: /* command: "'next'" call_args  */
-#line 3080 "mrbgems/mruby-compiler/core/parse.y"
+#line 3084 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_next(p, ret_args(p, (yyvsp[0].nd)));
                     }
-#line 8363 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8367 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 76: /* mlhs: mlhs_basic  */
-#line 3086 "mrbgems/mruby-compiler/core/parse.y"
+#line 3090 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 8371 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8375 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 77: /* mlhs: tLPAREN mlhs_inner rparen  */
-#line 3090 "mrbgems/mruby-compiler/core/parse.y"
+#line 3094 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 8379 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8383 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 79: /* mlhs_inner: tLPAREN mlhs_inner rparen  */
-#line 3097 "mrbgems/mruby-compiler/core/parse.y"
+#line 3101 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 8387 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8391 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 80: /* mlhs_basic: mlhs_list  */
-#line 3103 "mrbgems/mruby-compiler/core/parse.y"
+#line 3107 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 8395 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8399 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 81: /* mlhs_basic: mlhs_list mlhs_item  */
-#line 3107 "mrbgems/mruby-compiler/core/parse.y"
+#line 3111 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1(push((yyvsp[-1].nd),(yyvsp[0].nd)));
                     }
-#line 8403 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8407 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 82: /* mlhs_basic: mlhs_list "*" mlhs_node  */
-#line 3111 "mrbgems/mruby-compiler/core/parse.y"
+#line 3115 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list2((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 8411 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8415 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 83: /* mlhs_basic: mlhs_list "*" mlhs_node ',' mlhs_post  */
-#line 3115 "mrbgems/mruby-compiler/core/parse.y"
+#line 3119 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3((yyvsp[-4].nd), (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 8419 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8423 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 84: /* mlhs_basic: mlhs_list "*"  */
-#line 3119 "mrbgems/mruby-compiler/core/parse.y"
+#line 3123 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list2((yyvsp[-1].nd), new_nil(p));
                     }
-#line 8427 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8431 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 85: /* mlhs_basic: mlhs_list "*" ',' mlhs_post  */
-#line 3123 "mrbgems/mruby-compiler/core/parse.y"
+#line 3127 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3((yyvsp[-3].nd), new_nil(p), (yyvsp[0].nd));
                     }
-#line 8435 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8439 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 86: /* mlhs_basic: "*" mlhs_node  */
-#line 3127 "mrbgems/mruby-compiler/core/parse.y"
+#line 3131 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list2(0, (yyvsp[0].nd));
                     }
-#line 8443 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8447 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 87: /* mlhs_basic: "*" mlhs_node ',' mlhs_post  */
-#line 3131 "mrbgems/mruby-compiler/core/parse.y"
+#line 3135 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3(0, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 8451 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8455 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 88: /* mlhs_basic: "*"  */
-#line 3135 "mrbgems/mruby-compiler/core/parse.y"
+#line 3139 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list2(0, new_nil(p));
                     }
-#line 8459 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8463 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 89: /* mlhs_basic: "*" ',' mlhs_post  */
-#line 3139 "mrbgems/mruby-compiler/core/parse.y"
+#line 3143 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3(0, new_nil(p), (yyvsp[0].nd));
                     }
-#line 8467 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8471 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 91: /* mlhs_item: tLPAREN mlhs_inner rparen  */
-#line 3146 "mrbgems/mruby-compiler/core/parse.y"
+#line 3150 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_masgn(p, (yyvsp[-1].nd), NULL);
                     }
-#line 8475 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8479 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 92: /* mlhs_list: mlhs_item ','  */
-#line 3152 "mrbgems/mruby-compiler/core/parse.y"
+#line 3156 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1((yyvsp[-1].nd));
                     }
-#line 8483 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8487 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 93: /* mlhs_list: mlhs_list mlhs_item ','  */
-#line 3156 "mrbgems/mruby-compiler/core/parse.y"
+#line 3160 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[-1].nd));
                     }
-#line 8491 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8495 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 94: /* mlhs_post: mlhs_item  */
-#line 3162 "mrbgems/mruby-compiler/core/parse.y"
+#line 3166 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 8499 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8503 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 95: /* mlhs_post: mlhs_list mlhs_item  */
-#line 3166 "mrbgems/mruby-compiler/core/parse.y"
+#line 3170 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 8507 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8511 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 96: /* mlhs_node: variable  */
-#line 3172 "mrbgems/mruby-compiler/core/parse.y"
+#line 3176 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       assignable(p, (yyvsp[0].nd));
                     }
-#line 8515 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8519 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 97: /* mlhs_node: primary_value '[' opt_call_args ']'  */
-#line 3176 "mrbgems/mruby-compiler/core/parse.y"
+#line 3180 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), intern_op(aref), (yyvsp[-1].nd), '.');
                     }
-#line 8523 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8527 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 98: /* mlhs_node: primary_value call_op "local variable or method"  */
-#line 3180 "mrbgems/mruby-compiler/core/parse.y"
+#line 3184 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-2].nd), (yyvsp[0].id), 0, (yyvsp[-1].num));
                     }
-#line 8531 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8535 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 99: /* mlhs_node: primary_value "::" "local variable or method"  */
-#line 3184 "mrbgems/mruby-compiler/core/parse.y"
+#line 3188 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-2].nd), (yyvsp[0].id), 0, tCOLON2);
                     }
-#line 8539 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8543 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 100: /* mlhs_node: primary_value call_op "constant"  */
-#line 3188 "mrbgems/mruby-compiler/core/parse.y"
+#line 3192 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-2].nd), (yyvsp[0].id), 0, (yyvsp[-1].num));
                     }
-#line 8547 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8551 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 101: /* mlhs_node: primary_value "::" "constant"  */
-#line 3192 "mrbgems/mruby-compiler/core/parse.y"
+#line 3196 "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 8557 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8561 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 102: /* mlhs_node: tCOLON3 "constant"  */
-#line 3198 "mrbgems/mruby-compiler/core/parse.y"
+#line 3202 "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 8567 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8571 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 103: /* mlhs_node: backref  */
-#line 3204 "mrbgems/mruby-compiler/core/parse.y"
+#line 3208 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       backref_error(p, (yyvsp[0].nd));
                       (yyval.nd) = 0;
                     }
-#line 8576 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8580 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 104: /* lhs: variable  */
-#line 3211 "mrbgems/mruby-compiler/core/parse.y"
+#line 3215 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       assignable(p, (yyvsp[0].nd));
                     }
-#line 8584 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8588 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 105: /* lhs: primary_value '[' opt_call_args ']'  */
-#line 3215 "mrbgems/mruby-compiler/core/parse.y"
+#line 3219 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), intern_op(aref), (yyvsp[-1].nd), '.');
                     }
-#line 8592 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8596 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 106: /* lhs: primary_value call_op "local variable or method"  */
-#line 3219 "mrbgems/mruby-compiler/core/parse.y"
+#line 3223 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-2].nd), (yyvsp[0].id), 0, (yyvsp[-1].num));
                     }
-#line 8600 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8604 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 107: /* lhs: primary_value "::" "local variable or method"  */
-#line 3223 "mrbgems/mruby-compiler/core/parse.y"
+#line 3227 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-2].nd), (yyvsp[0].id), 0, tCOLON2);
                     }
-#line 8608 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8612 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 108: /* lhs: primary_value call_op "constant"  */
-#line 3227 "mrbgems/mruby-compiler/core/parse.y"
+#line 3231 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-2].nd), (yyvsp[0].id), 0, (yyvsp[-1].num));
                     }
-#line 8616 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8620 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 109: /* lhs: primary_value "::" "constant"  */
-#line 3231 "mrbgems/mruby-compiler/core/parse.y"
+#line 3235 "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 8626 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8630 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 110: /* lhs: tCOLON3 "constant"  */
-#line 3237 "mrbgems/mruby-compiler/core/parse.y"
+#line 3241 "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 8636 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8640 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 111: /* lhs: backref  */
-#line 3243 "mrbgems/mruby-compiler/core/parse.y"
+#line 3247 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       backref_error(p, (yyvsp[0].nd));
                       (yyval.nd) = 0;
                     }
-#line 8645 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8649 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 112: /* lhs: "numbered parameter"  */
-#line 3248 "mrbgems/mruby-compiler/core/parse.y"
+#line 3252 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[0]), p, "can't assign to numbered parameter");
                     }
-#line 8653 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8657 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 113: /* cname: "local variable or method"  */
-#line 3254 "mrbgems/mruby-compiler/core/parse.y"
+#line 3258 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[0]), p, "class/module name must be CONSTANT");
                     }
-#line 8661 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8665 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 115: /* cpath: tCOLON3 cname  */
-#line 3261 "mrbgems/mruby-compiler/core/parse.y"
+#line 3265 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = cons(int_to_node(1), sym_to_node((yyvsp[0].id)));
                     }
-#line 8669 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8673 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 116: /* cpath: cname  */
-#line 3265 "mrbgems/mruby-compiler/core/parse.y"
+#line 3269 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = cons(int_to_node(0), sym_to_node((yyvsp[0].id)));
                     }
-#line 8677 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8681 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 117: /* cpath: primary_value "::" cname  */
-#line 3269 "mrbgems/mruby-compiler/core/parse.y"
+#line 3273 "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 8686 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8690 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 121: /* fname: op  */
-#line 3279 "mrbgems/mruby-compiler/core/parse.y"
+#line 3283 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->lstate = EXPR_ENDFN;
                       (yyval.id) = (yyvsp[0].id);
                     }
-#line 8695 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8699 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 122: /* fname: reswords  */
-#line 3284 "mrbgems/mruby-compiler/core/parse.y"
+#line 3288 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->lstate = EXPR_ENDFN;
                       (yyval.id) = (yyvsp[0].id);
                     }
-#line 8704 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8708 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 125: /* undef_list: fsym  */
-#line 3295 "mrbgems/mruby-compiler/core/parse.y"
+#line 3299 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = cons(sym_to_node((yyvsp[0].id)), 0);
                     }
-#line 8712 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8716 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 126: /* $@6: %empty  */
-#line 3298 "mrbgems/mruby-compiler/core/parse.y"
+#line 3302 "mrbgems/mruby-compiler/core/parse.y"
                                  {p->lstate = EXPR_FNAME;}
-#line 8718 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8722 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 127: /* undef_list: undef_list ',' $@6 fsym  */
-#line 3299 "mrbgems/mruby-compiler/core/parse.y"
+#line 3303 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-3].nd), sym_to_node((yyvsp[0].id)));
                     }
-#line 8726 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8730 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 128: /* op: '|'  */
-#line 3304 "mrbgems/mruby-compiler/core/parse.y"
+#line 3308 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(or);     }
-#line 8732 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8736 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 129: /* op: '^'  */
-#line 3305 "mrbgems/mruby-compiler/core/parse.y"
+#line 3309 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(xor);    }
-#line 8738 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8742 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 130: /* op: '&'  */
-#line 3306 "mrbgems/mruby-compiler/core/parse.y"
+#line 3310 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(and);    }
-#line 8744 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8748 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 131: /* op: "<=>"  */
-#line 3307 "mrbgems/mruby-compiler/core/parse.y"
+#line 3311 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(cmp);    }
-#line 8750 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8754 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 132: /* op: "=="  */
-#line 3308 "mrbgems/mruby-compiler/core/parse.y"
+#line 3312 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(eq);     }
-#line 8756 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8760 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 133: /* op: "==="  */
-#line 3309 "mrbgems/mruby-compiler/core/parse.y"
+#line 3313 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(eqq);    }
-#line 8762 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8766 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 134: /* op: "=~"  */
-#line 3310 "mrbgems/mruby-compiler/core/parse.y"
+#line 3314 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(match);  }
-#line 8768 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8772 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 135: /* op: "!~"  */
-#line 3311 "mrbgems/mruby-compiler/core/parse.y"
+#line 3315 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(nmatch); }
-#line 8774 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8778 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 136: /* op: '>'  */
-#line 3312 "mrbgems/mruby-compiler/core/parse.y"
+#line 3316 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(gt);     }
-#line 8780 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8784 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 137: /* op: ">="  */
-#line 3313 "mrbgems/mruby-compiler/core/parse.y"
+#line 3317 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(ge);     }
-#line 8786 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8790 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 138: /* op: '<'  */
-#line 3314 "mrbgems/mruby-compiler/core/parse.y"
+#line 3318 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(lt);     }
-#line 8792 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8796 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 139: /* op: "<="  */
-#line 3315 "mrbgems/mruby-compiler/core/parse.y"
+#line 3319 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(le);     }
-#line 8798 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8802 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 140: /* op: "!="  */
-#line 3316 "mrbgems/mruby-compiler/core/parse.y"
+#line 3320 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(neq);    }
-#line 8804 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8808 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 141: /* op: "<<"  */
-#line 3317 "mrbgems/mruby-compiler/core/parse.y"
+#line 3321 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(lshift); }
-#line 8810 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8814 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 142: /* op: ">>"  */
-#line 3318 "mrbgems/mruby-compiler/core/parse.y"
+#line 3322 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(rshift); }
-#line 8816 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8820 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 143: /* op: '+'  */
-#line 3319 "mrbgems/mruby-compiler/core/parse.y"
+#line 3323 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(add);    }
-#line 8822 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8826 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 144: /* op: '-'  */
-#line 3320 "mrbgems/mruby-compiler/core/parse.y"
+#line 3324 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(sub);    }
-#line 8828 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8832 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 145: /* op: '*'  */
-#line 3321 "mrbgems/mruby-compiler/core/parse.y"
+#line 3325 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(mul);    }
-#line 8834 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8838 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 146: /* op: "*"  */
-#line 3322 "mrbgems/mruby-compiler/core/parse.y"
+#line 3326 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(mul);    }
-#line 8840 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8844 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 147: /* op: '/'  */
-#line 3323 "mrbgems/mruby-compiler/core/parse.y"
+#line 3327 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(div);    }
-#line 8846 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8850 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 148: /* op: '%'  */
-#line 3324 "mrbgems/mruby-compiler/core/parse.y"
+#line 3328 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(mod);    }
-#line 8852 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8856 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 149: /* op: tPOW  */
-#line 3325 "mrbgems/mruby-compiler/core/parse.y"
+#line 3329 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(pow);    }
-#line 8858 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8862 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 150: /* op: "**"  */
-#line 3326 "mrbgems/mruby-compiler/core/parse.y"
+#line 3330 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(pow);    }
-#line 8864 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8868 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 151: /* op: '!'  */
-#line 3327 "mrbgems/mruby-compiler/core/parse.y"
+#line 3331 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(not);    }
-#line 8870 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8874 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 152: /* op: '~'  */
-#line 3328 "mrbgems/mruby-compiler/core/parse.y"
+#line 3332 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(neg);    }
-#line 8876 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8880 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 153: /* op: "unary plus"  */
-#line 3329 "mrbgems/mruby-compiler/core/parse.y"
+#line 3333 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(plus);   }
-#line 8882 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8886 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 154: /* op: "unary minus"  */
-#line 3330 "mrbgems/mruby-compiler/core/parse.y"
+#line 3334 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(minus);  }
-#line 8888 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8892 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 155: /* op: tAREF  */
-#line 3331 "mrbgems/mruby-compiler/core/parse.y"
+#line 3335 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(aref);   }
-#line 8894 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8898 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 156: /* op: tASET  */
-#line 3332 "mrbgems/mruby-compiler/core/parse.y"
+#line 3336 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(aset);   }
-#line 8900 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8904 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 157: /* op: '`'  */
-#line 3333 "mrbgems/mruby-compiler/core/parse.y"
+#line 3337 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(tick);   }
-#line 8906 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8910 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 198: /* arg: lhs '=' arg_rhs  */
-#line 3351 "mrbgems/mruby-compiler/core/parse.y"
+#line 3355 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_asgn(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 8914 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8918 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 199: /* arg: var_lhs tOP_ASGN arg_rhs  */
-#line 3355 "mrbgems/mruby-compiler/core/parse.y"
+#line 3359 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_op_asgn(p, (yyvsp[-2].nd), (yyvsp[-1].id), (yyvsp[0].nd));
                     }
-#line 8922 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8926 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 200: /* arg: primary_value '[' opt_call_args ']' tOP_ASGN arg_rhs  */
-#line 3359 "mrbgems/mruby-compiler/core/parse.y"
+#line 3363 "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 8930 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8934 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 201: /* arg: primary_value call_op "local variable or method" tOP_ASGN arg_rhs  */
-#line 3363 "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 8938 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 202: /* arg: primary_value call_op "constant" tOP_ASGN arg_rhs  */
 #line 3367 "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 8946 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8942 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 202: /* arg: primary_value call_op "constant" tOP_ASGN arg_rhs  */
+#line 3371 "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 8950 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 203: /* arg: primary_value "::" "local variable or method" tOP_ASGN arg_rhs  */
-#line 3371 "mrbgems/mruby-compiler/core/parse.y"
+#line 3375 "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 8954 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8958 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 204: /* arg: primary_value "::" "constant" tOP_ASGN arg_rhs  */
-#line 3375 "mrbgems/mruby-compiler/core/parse.y"
+#line 3379 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[-4]), p, "constant re-assignment");
                       (yyval.nd) = new_stmts(p, 0);
                     }
-#line 8963 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8967 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 205: /* arg: tCOLON3 "constant" tOP_ASGN arg_rhs  */
-#line 3380 "mrbgems/mruby-compiler/core/parse.y"
+#line 3384 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[-3]), p, "constant re-assignment");
                       (yyval.nd) = new_stmts(p, 0);
                     }
-#line 8972 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8976 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 206: /* arg: backref tOP_ASGN arg_rhs  */
-#line 3385 "mrbgems/mruby-compiler/core/parse.y"
+#line 3389 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       backref_error(p, (yyvsp[-2].nd));
                       (yyval.nd) = new_stmts(p, 0);
                     }
-#line 8981 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8985 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 207: /* arg: arg ".." arg  */
-#line 3390 "mrbgems/mruby-compiler/core/parse.y"
+#line 3394 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_dot2(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 8989 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8993 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 208: /* arg: arg ".."  */
-#line 3394 "mrbgems/mruby-compiler/core/parse.y"
+#line 3398 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_dot2(p, (yyvsp[-1].nd), new_nil(p));
                     }
-#line 8997 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9001 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 209: /* arg: tBDOT2 arg  */
-#line 3398 "mrbgems/mruby-compiler/core/parse.y"
+#line 3402 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_dot2(p, new_nil(p), (yyvsp[0].nd));
                     }
-#line 9005 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9009 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 210: /* arg: arg "..." arg  */
-#line 3402 "mrbgems/mruby-compiler/core/parse.y"
+#line 3406 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_dot3(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 9013 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9017 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 211: /* arg: arg "..."  */
-#line 3406 "mrbgems/mruby-compiler/core/parse.y"
+#line 3410 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_dot3(p, (yyvsp[-1].nd), new_nil(p));
                     }
-#line 9021 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9025 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 212: /* arg: tBDOT3 arg  */
-#line 3410 "mrbgems/mruby-compiler/core/parse.y"
+#line 3414 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_dot3(p, new_nil(p), (yyvsp[0].nd));
                     }
-#line 9029 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9033 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 213: /* arg: arg '+' arg  */
-#line 3414 "mrbgems/mruby-compiler/core/parse.y"
+#line 3418 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "+", (yyvsp[0].nd));
                     }
-#line 9037 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9041 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 214: /* arg: arg '-' arg  */
-#line 3418 "mrbgems/mruby-compiler/core/parse.y"
+#line 3422 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "-", (yyvsp[0].nd));
                     }
-#line 9045 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9049 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 215: /* arg: arg '*' arg  */
-#line 3422 "mrbgems/mruby-compiler/core/parse.y"
+#line 3426 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "*", (yyvsp[0].nd));
                     }
-#line 9053 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9057 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 216: /* arg: arg '/' arg  */
-#line 3426 "mrbgems/mruby-compiler/core/parse.y"
+#line 3430 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "/", (yyvsp[0].nd));
                     }
-#line 9061 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9065 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 217: /* arg: arg '%' arg  */
-#line 3430 "mrbgems/mruby-compiler/core/parse.y"
+#line 3434 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "%", (yyvsp[0].nd));
                     }
-#line 9069 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9073 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 218: /* arg: arg tPOW arg  */
-#line 3434 "mrbgems/mruby-compiler/core/parse.y"
+#line 3438 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "**", (yyvsp[0].nd));
                     }
-#line 9077 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9081 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 219: /* arg: tUMINUS_NUM "integer literal" tPOW arg  */
-#line 3438 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_negate(p, call_bin_op(p, (yyvsp[-2].nd), "**", (yyvsp[0].nd)));
-                    }
-#line 9085 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 220: /* arg: tUMINUS_NUM "float literal" tPOW arg  */
 #line 3442 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_negate(p, call_bin_op(p, (yyvsp[-2].nd), "**", (yyvsp[0].nd)));
                     }
-#line 9093 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9089 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 220: /* arg: tUMINUS_NUM "float literal" tPOW arg  */
+#line 3446 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_negate(p, call_bin_op(p, (yyvsp[-2].nd), "**", (yyvsp[0].nd)));
+                    }
+#line 9097 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 221: /* arg: "unary plus" arg  */
-#line 3446 "mrbgems/mruby-compiler/core/parse.y"
+#line 3450 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_uni_op(p, (yyvsp[0].nd), "+@");
                     }
-#line 9101 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9105 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 222: /* arg: "unary minus" arg  */
-#line 3450 "mrbgems/mruby-compiler/core/parse.y"
+#line 3454 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_negate(p, (yyvsp[0].nd));
                     }
-#line 9109 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9113 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 223: /* arg: arg '|' arg  */
-#line 3454 "mrbgems/mruby-compiler/core/parse.y"
+#line 3458 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "|", (yyvsp[0].nd));
                     }
-#line 9117 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9121 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 224: /* arg: arg '^' arg  */
-#line 3458 "mrbgems/mruby-compiler/core/parse.y"
+#line 3462 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "^", (yyvsp[0].nd));
                     }
-#line 9125 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9129 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 225: /* arg: arg '&' arg  */
-#line 3462 "mrbgems/mruby-compiler/core/parse.y"
+#line 3466 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "&", (yyvsp[0].nd));
                     }
-#line 9133 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9137 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 226: /* arg: arg "<=>" arg  */
-#line 3466 "mrbgems/mruby-compiler/core/parse.y"
+#line 3470 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "<=>", (yyvsp[0].nd));
                     }
-#line 9141 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9145 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 227: /* arg: arg '>' arg  */
-#line 3470 "mrbgems/mruby-compiler/core/parse.y"
+#line 3474 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), ">", (yyvsp[0].nd));
                     }
-#line 9149 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9153 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 228: /* arg: arg ">=" arg  */
-#line 3474 "mrbgems/mruby-compiler/core/parse.y"
+#line 3478 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), ">=", (yyvsp[0].nd));
                     }
-#line 9157 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9161 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 229: /* arg: arg '<' arg  */
-#line 3478 "mrbgems/mruby-compiler/core/parse.y"
+#line 3482 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "<", (yyvsp[0].nd));
                     }
-#line 9165 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9169 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 230: /* arg: arg "<=" arg  */
-#line 3482 "mrbgems/mruby-compiler/core/parse.y"
+#line 3486 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "<=", (yyvsp[0].nd));
                     }
-#line 9173 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9177 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 231: /* arg: arg "==" arg  */
-#line 3486 "mrbgems/mruby-compiler/core/parse.y"
+#line 3490 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "==", (yyvsp[0].nd));
                     }
-#line 9181 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9185 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 232: /* arg: arg "===" arg  */
-#line 3490 "mrbgems/mruby-compiler/core/parse.y"
+#line 3494 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "===", (yyvsp[0].nd));
                     }
-#line 9189 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9193 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 233: /* arg: arg "!=" arg  */
-#line 3494 "mrbgems/mruby-compiler/core/parse.y"
+#line 3498 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "!=", (yyvsp[0].nd));
                     }
-#line 9197 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9201 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 234: /* arg: arg "=~" arg  */
-#line 3498 "mrbgems/mruby-compiler/core/parse.y"
+#line 3502 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "=~", (yyvsp[0].nd));
                     }
-#line 9205 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9209 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 235: /* arg: arg "!~" arg  */
-#line 3502 "mrbgems/mruby-compiler/core/parse.y"
+#line 3506 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "!~", (yyvsp[0].nd));
                     }
-#line 9213 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9217 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 236: /* arg: '!' arg  */
-#line 3506 "mrbgems/mruby-compiler/core/parse.y"
+#line 3510 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_uni_op(p, cond((yyvsp[0].nd)), "!");
                     }
-#line 9221 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9225 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 237: /* arg: '~' arg  */
-#line 3510 "mrbgems/mruby-compiler/core/parse.y"
+#line 3514 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_uni_op(p, cond((yyvsp[0].nd)), "~");
                     }
-#line 9229 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9233 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 238: /* arg: arg "<<" arg  */
-#line 3514 "mrbgems/mruby-compiler/core/parse.y"
+#line 3518 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "<<", (yyvsp[0].nd));
                     }
-#line 9237 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9241 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 239: /* arg: arg ">>" arg  */
-#line 3518 "mrbgems/mruby-compiler/core/parse.y"
+#line 3522 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), ">>", (yyvsp[0].nd));
                     }
-#line 9245 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9249 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 240: /* arg: arg "&&" arg  */
-#line 3522 "mrbgems/mruby-compiler/core/parse.y"
+#line 3526 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_and(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 9253 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9257 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 241: /* arg: arg "||" arg  */
-#line 3526 "mrbgems/mruby-compiler/core/parse.y"
+#line 3530 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_or(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 9261 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9265 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 242: /* arg: arg '?' arg opt_nl ':' arg  */
-#line 3530 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_if(p, cond((yyvsp[-5].nd)), (yyvsp[-3].nd), (yyvsp[0].nd));
-                    }
-#line 9269 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 243: /* arg: arg '?' arg opt_nl "label" arg  */
 #line 3534 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_if(p, cond((yyvsp[-5].nd)), (yyvsp[-3].nd), (yyvsp[0].nd));
                     }
-#line 9277 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9273 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 243: /* arg: arg '?' arg opt_nl "label" arg  */
+#line 3538 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_if(p, cond((yyvsp[-5].nd)), (yyvsp[-3].nd), (yyvsp[0].nd));
+                    }
+#line 9281 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 244: /* arg: defn_head f_opt_arglist_paren '=' arg  */
-#line 3538 "mrbgems/mruby-compiler/core/parse.y"
+#line 3542 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-3].nd);
                       endless_method_name(p, (yyvsp[-3].nd));
@@ -9286,11 +9290,11 @@ yyreduce:
                       nvars_unnest(p);
                       p->in_def--;
                     }
-#line 9290 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9294 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 245: /* arg: defn_head f_opt_arglist_paren '=' arg "'rescue' modifier" arg  */
-#line 3547 "mrbgems/mruby-compiler/core/parse.y"
+#line 3551 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-5].nd);
                       endless_method_name(p, (yyvsp[-5].nd));
@@ -9299,11 +9303,11 @@ yyreduce:
                       nvars_unnest(p);
                       p->in_def--;
                     }
-#line 9303 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9307 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 246: /* arg: defs_head f_opt_arglist_paren '=' arg  */
-#line 3556 "mrbgems/mruby-compiler/core/parse.y"
+#line 3560 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-3].nd);
                       void_expr_error(p, (yyvsp[0].nd));
@@ -9312,11 +9316,11 @@ yyreduce:
                       p->in_def--;
                       p->in_single--;
                     }
-#line 9316 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9320 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 247: /* arg: defs_head f_opt_arglist_paren '=' arg "'rescue' modifier" arg  */
-#line 3565 "mrbgems/mruby-compiler/core/parse.y"
+#line 3569 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-5].nd);
                       void_expr_error(p, (yyvsp[-2].nd));
@@ -9325,68 +9329,68 @@ yyreduce:
                       p->in_def--;
                       p->in_single--;
                     }
-#line 9329 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9333 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 248: /* arg: primary  */
-#line 3574 "mrbgems/mruby-compiler/core/parse.y"
+#line 3578 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 9337 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9341 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 250: /* aref_args: args trailer  */
-#line 3581 "mrbgems/mruby-compiler/core/parse.y"
+#line 3585 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 9345 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9349 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 251: /* aref_args: args comma assocs trailer  */
-#line 3585 "mrbgems/mruby-compiler/core/parse.y"
+#line 3589 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-3].nd), new_hash(p, (yyvsp[-1].nd)));
                     }
-#line 9353 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9357 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 252: /* aref_args: assocs trailer  */
-#line 3589 "mrbgems/mruby-compiler/core/parse.y"
+#line 3593 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = cons(new_kw_hash(p, (yyvsp[-1].nd)), 0);
                     }
-#line 9361 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9365 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 253: /* arg_rhs: arg  */
-#line 3595 "mrbgems/mruby-compiler/core/parse.y"
+#line 3599 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 9369 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9373 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 254: /* arg_rhs: arg "'rescue' modifier" arg  */
-#line 3599 "mrbgems/mruby-compiler/core/parse.y"
+#line 3603 "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 9378 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9382 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 255: /* paren_args: '(' opt_call_args ')'  */
-#line 3606 "mrbgems/mruby-compiler/core/parse.y"
+#line 3610 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 9386 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9390 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 256: /* paren_args: '(' args comma tBDOT3 rparen  */
-#line 3610 "mrbgems/mruby-compiler/core/parse.y"
+#line 3614 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       mrb_sym r = intern_op(mul);
                       mrb_sym k = intern_op(pow);
@@ -9395,11 +9399,11 @@ 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 9399 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9403 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 257: /* paren_args: '(' tBDOT3 rparen  */
-#line 3619 "mrbgems/mruby-compiler/core/parse.y"
+#line 3623 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       mrb_sym r = intern_op(mul);
                       mrb_sym k = intern_op(pow);
@@ -9414,390 +9418,390 @@ yyreduce:
                         (yyval.nd) = 0;
                       }
                     }
-#line 9418 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9422 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 262: /* opt_call_args: args comma  */
-#line 3642 "mrbgems/mruby-compiler/core/parse.y"
+#line 3646 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_callargs(p,(yyvsp[-1].nd),0,0);
                     }
-#line 9426 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9430 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 263: /* opt_call_args: args comma assocs comma  */
-#line 3646 "mrbgems/mruby-compiler/core/parse.y"
+#line 3650 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_callargs(p,(yyvsp[-3].nd),new_kw_hash(p,(yyvsp[-1].nd)),0);
                     }
-#line 9434 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9438 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 264: /* opt_call_args: assocs comma  */
-#line 3650 "mrbgems/mruby-compiler/core/parse.y"
+#line 3654 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_callargs(p,0,new_kw_hash(p,(yyvsp[-1].nd)),0);
                     }
-#line 9442 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9446 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 265: /* call_args: command  */
-#line 3656 "mrbgems/mruby-compiler/core/parse.y"
+#line 3660 "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 9451 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9455 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 266: /* call_args: args opt_block_arg  */
-#line 3661 "mrbgems/mruby-compiler/core/parse.y"
+#line 3665 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_callargs(p, (yyvsp[-1].nd), 0, (yyvsp[0].nd));
                     }
-#line 9459 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9463 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 267: /* call_args: assocs opt_block_arg  */
-#line 3665 "mrbgems/mruby-compiler/core/parse.y"
+#line 3669 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_callargs(p, 0, new_kw_hash(p, (yyvsp[-1].nd)), (yyvsp[0].nd));
                     }
-#line 9467 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9471 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 268: /* call_args: args comma assocs opt_block_arg  */
-#line 3669 "mrbgems/mruby-compiler/core/parse.y"
+#line 3673 "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 9475 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9479 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 269: /* call_args: block_arg  */
-#line 3673 "mrbgems/mruby-compiler/core/parse.y"
+#line 3677 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_callargs(p, 0, 0, (yyvsp[0].nd));
                     }
-#line 9483 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9487 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 270: /* @7: %empty  */
-#line 3678 "mrbgems/mruby-compiler/core/parse.y"
+#line 3682 "mrbgems/mruby-compiler/core/parse.y"
                    {
                       (yyval.stack) = p->cmdarg_stack;
                       CMDARG_PUSH(1);
                     }
-#line 9492 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9496 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 271: /* command_args: @7 call_args  */
-#line 3683 "mrbgems/mruby-compiler/core/parse.y"
+#line 3687 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->cmdarg_stack = (yyvsp[-1].stack);
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 9501 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9505 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 272: /* block_arg: "&" arg  */
-#line 3690 "mrbgems/mruby-compiler/core/parse.y"
+#line 3694 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_block_arg(p, (yyvsp[0].nd));
                     }
-#line 9509 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9513 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 273: /* block_arg: "&"  */
-#line 3694 "mrbgems/mruby-compiler/core/parse.y"
+#line 3698 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_block_arg(p, 0);
                     }
-#line 9517 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9521 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 274: /* opt_block_arg: comma block_arg  */
-#line 3700 "mrbgems/mruby-compiler/core/parse.y"
+#line 3704 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 9525 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9529 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 275: /* opt_block_arg: none  */
-#line 3704 "mrbgems/mruby-compiler/core/parse.y"
+#line 3708 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = 0;
                     }
-#line 9533 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9537 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 277: /* args: arg  */
-#line 3713 "mrbgems/mruby-compiler/core/parse.y"
+#line 3717 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       void_expr_error(p, (yyvsp[0].nd));
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 9542 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9546 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 278: /* args: "*"  */
-#line 3718 "mrbgems/mruby-compiler/core/parse.y"
+#line 3722 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1(new_splat(p, new_lvar(p, intern_op(mul))));
                     }
-#line 9550 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9554 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 279: /* args: "*" arg  */
-#line 3722 "mrbgems/mruby-compiler/core/parse.y"
+#line 3726 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1(new_splat(p, (yyvsp[0].nd)));
                     }
-#line 9558 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9562 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 280: /* args: args comma arg  */
-#line 3726 "mrbgems/mruby-compiler/core/parse.y"
+#line 3730 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       void_expr_error(p, (yyvsp[0].nd));
                       (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 9567 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9571 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 281: /* args: args comma "*"  */
-#line 3731 "mrbgems/mruby-compiler/core/parse.y"
+#line 3735 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-2].nd), new_splat(p, new_lvar(p, intern_op(mul))));
                     }
-#line 9575 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9579 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 282: /* args: args comma "*" arg  */
-#line 3735 "mrbgems/mruby-compiler/core/parse.y"
+#line 3739 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-3].nd), new_splat(p, (yyvsp[0].nd)));
                     }
-#line 9583 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9587 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 283: /* mrhs: args comma arg  */
-#line 3741 "mrbgems/mruby-compiler/core/parse.y"
+#line 3745 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       void_expr_error(p, (yyvsp[0].nd));
                       (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 9592 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9596 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 284: /* mrhs: args comma "*" arg  */
-#line 3746 "mrbgems/mruby-compiler/core/parse.y"
+#line 3750 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-3].nd), new_splat(p, (yyvsp[0].nd)));
                     }
-#line 9600 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9604 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 285: /* mrhs: "*" arg  */
-#line 3750 "mrbgems/mruby-compiler/core/parse.y"
+#line 3754 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1(new_splat(p, (yyvsp[0].nd)));
                     }
-#line 9608 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9612 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 287: /* primary: string  */
-#line 3757 "mrbgems/mruby-compiler/core/parse.y"
+#line 3761 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_str(p, (yyvsp[0].nd));
                     }
-#line 9616 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9620 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 288: /* primary: xstring  */
-#line 3761 "mrbgems/mruby-compiler/core/parse.y"
+#line 3765 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_xstr(p, (yyvsp[0].nd));
                     }
-#line 9624 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9628 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 293: /* primary: "method"  */
-#line 3769 "mrbgems/mruby-compiler/core/parse.y"
+#line 3773 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_fcall(p, (yyvsp[0].id), 0);
                     }
-#line 9632 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9636 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 294: /* @8: %empty  */
-#line 3773 "mrbgems/mruby-compiler/core/parse.y"
+#line 3777 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.stack) = p->cmdarg_stack;
                       p->cmdarg_stack = 0;
                     }
-#line 9641 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9645 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 295: /* primary: "'begin'" @8 bodystmt "'end'"  */
-#line 3779 "mrbgems/mruby-compiler/core/parse.y"
+#line 3783 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->cmdarg_stack = (yyvsp[-2].stack);
                       (yyval.nd) = new_begin(p, (yyvsp[-1].nd));
                     }
-#line 9650 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9654 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 296: /* @9: %empty  */
-#line 3784 "mrbgems/mruby-compiler/core/parse.y"
+#line 3788 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.stack) = p->cmdarg_stack;
                       p->cmdarg_stack = 0;
                     }
-#line 9659 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9663 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 297: /* $@10: %empty  */
-#line 3788 "mrbgems/mruby-compiler/core/parse.y"
+#line 3792 "mrbgems/mruby-compiler/core/parse.y"
                        {p->lstate = EXPR_ENDARG;}
-#line 9665 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9669 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 298: /* primary: "(" @9 stmt $@10 rparen  */
-#line 3789 "mrbgems/mruby-compiler/core/parse.y"
+#line 3793 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->cmdarg_stack = (yyvsp[-3].stack);
                       (yyval.nd) = (yyvsp[-2].nd);
                     }
-#line 9674 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9678 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 299: /* $@11: %empty  */
-#line 3793 "mrbgems/mruby-compiler/core/parse.y"
+#line 3797 "mrbgems/mruby-compiler/core/parse.y"
                               {p->lstate = EXPR_ENDARG;}
-#line 9680 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9684 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 300: /* primary: "(" $@11 rparen  */
-#line 3794 "mrbgems/mruby-compiler/core/parse.y"
+#line 3798 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_nil(p);
                     }
-#line 9688 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9692 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 301: /* primary: tLPAREN compstmt ')'  */
-#line 3798 "mrbgems/mruby-compiler/core/parse.y"
+#line 3802 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 9696 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9700 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 302: /* primary: primary_value "::" "constant"  */
-#line 3802 "mrbgems/mruby-compiler/core/parse.y"
+#line 3806 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_colon2(p, (yyvsp[-2].nd), (yyvsp[0].id));
                     }
-#line 9704 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9708 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 303: /* primary: tCOLON3 "constant"  */
-#line 3806 "mrbgems/mruby-compiler/core/parse.y"
+#line 3810 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_colon3(p, (yyvsp[0].id));
                     }
-#line 9712 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9716 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 304: /* primary: "[" aref_args ']'  */
-#line 3810 "mrbgems/mruby-compiler/core/parse.y"
+#line 3814 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_array(p, (yyvsp[-1].nd));
                     }
-#line 9720 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9724 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 305: /* primary: tLBRACE assoc_list '}'  */
-#line 3814 "mrbgems/mruby-compiler/core/parse.y"
+#line 3818 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_hash(p, (yyvsp[-1].nd));
                     }
-#line 9728 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9732 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 306: /* primary: "'return'"  */
-#line 3818 "mrbgems/mruby-compiler/core/parse.y"
+#line 3822 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_return(p, 0);
                     }
-#line 9736 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9740 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 307: /* primary: "'yield'" opt_paren_args  */
-#line 3822 "mrbgems/mruby-compiler/core/parse.y"
+#line 3826 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_yield(p, (yyvsp[0].nd));
                     }
-#line 9744 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9748 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 308: /* primary: "'not'" '(' expr rparen  */
-#line 3826 "mrbgems/mruby-compiler/core/parse.y"
+#line 3830 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_uni_op(p, cond((yyvsp[-1].nd)), "!");
                     }
-#line 9752 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9756 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 309: /* primary: "'not'" '(' rparen  */
-#line 3830 "mrbgems/mruby-compiler/core/parse.y"
+#line 3834 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_uni_op(p, new_nil(p), "!");
                     }
-#line 9760 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9764 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 310: /* primary: operation brace_block  */
-#line 3834 "mrbgems/mruby-compiler/core/parse.y"
+#line 3838 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_fcall(p, (yyvsp[-1].id), new_callargs(p, 0, 0, (yyvsp[0].nd)));
                     }
-#line 9768 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9772 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 312: /* primary: method_call brace_block  */
-#line 3839 "mrbgems/mruby-compiler/core/parse.y"
+#line 3843 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       call_with_block(p, (yyvsp[-1].nd), (yyvsp[0].nd));
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 9777 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9781 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 313: /* @12: %empty  */
-#line 3844 "mrbgems/mruby-compiler/core/parse.y"
+#line 3848 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_nest(p);
                       nvars_nest(p);
                       (yyval.num) = p->lpar_beg;
                       p->lpar_beg = ++p->paren_nest;
                     }
-#line 9788 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9792 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 314: /* @13: %empty  */
-#line 3851 "mrbgems/mruby-compiler/core/parse.y"
+#line 3855 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.stack) = p->cmdarg_stack;
                       p->cmdarg_stack = 0;
                     }
-#line 9797 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9801 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 315: /* primary: "->" @12 f_larglist @13 lambda_body  */
-#line 3856 "mrbgems/mruby-compiler/core/parse.y"
+#line 3860 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->lpar_beg = (yyvsp[-3].num);
                       (yyval.nd) = new_lambda(p, (yyvsp[-2].nd), (yyvsp[0].nd));
@@ -9806,149 +9810,149 @@ yyreduce:
                       p->cmdarg_stack = (yyvsp[-1].stack);
                       CMDARG_LEXPOP();
                     }
-#line 9810 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9814 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 316: /* primary: "'if'" expr_value then compstmt if_tail "'end'"  */
-#line 3868 "mrbgems/mruby-compiler/core/parse.y"
+#line 3872 "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 9819 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9823 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 317: /* primary: "'unless'" expr_value then compstmt opt_else "'end'"  */
-#line 3876 "mrbgems/mruby-compiler/core/parse.y"
+#line 3880 "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 9828 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9832 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 318: /* $@14: %empty  */
-#line 3880 "mrbgems/mruby-compiler/core/parse.y"
+#line 3884 "mrbgems/mruby-compiler/core/parse.y"
                                 {COND_PUSH(1);}
-#line 9834 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9838 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 319: /* $@15: %empty  */
-#line 3880 "mrbgems/mruby-compiler/core/parse.y"
+#line 3884 "mrbgems/mruby-compiler/core/parse.y"
                                                               {COND_POP();}
-#line 9840 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9844 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 320: /* primary: "'while'" $@14 expr_value do $@15 compstmt "'end'"  */
-#line 3883 "mrbgems/mruby-compiler/core/parse.y"
+#line 3887 "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 9849 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9853 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 321: /* $@16: %empty  */
-#line 3887 "mrbgems/mruby-compiler/core/parse.y"
+#line 3891 "mrbgems/mruby-compiler/core/parse.y"
                                 {COND_PUSH(1);}
-#line 9855 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9859 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 322: /* $@17: %empty  */
-#line 3887 "mrbgems/mruby-compiler/core/parse.y"
+#line 3891 "mrbgems/mruby-compiler/core/parse.y"
                                                               {COND_POP();}
-#line 9861 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9865 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 323: /* primary: "'until'" $@16 expr_value do $@17 compstmt "'end'"  */
-#line 3890 "mrbgems/mruby-compiler/core/parse.y"
+#line 3894 "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 9870 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9874 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 324: /* primary: "'case'" expr_value opt_terms case_body "'end'"  */
-#line 3897 "mrbgems/mruby-compiler/core/parse.y"
+#line 3901 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_case(p, (yyvsp[-3].nd), (yyvsp[-1].nd));
                     }
-#line 9878 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9882 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 325: /* primary: "'case'" opt_terms case_body "'end'"  */
-#line 3901 "mrbgems/mruby-compiler/core/parse.y"
+#line 3905 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_case(p, 0, (yyvsp[-1].nd));
                     }
-#line 9886 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9890 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 326: /* $@18: %empty  */
-#line 3905 "mrbgems/mruby-compiler/core/parse.y"
+#line 3909 "mrbgems/mruby-compiler/core/parse.y"
                   {COND_PUSH(1);}
-#line 9892 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9896 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 327: /* $@19: %empty  */
-#line 3907 "mrbgems/mruby-compiler/core/parse.y"
+#line 3911 "mrbgems/mruby-compiler/core/parse.y"
                   {COND_POP();}
-#line 9898 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9902 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 328: /* primary: "'for'" for_var "'in'" $@18 expr_value do $@19 compstmt "'end'"  */
-#line 3910 "mrbgems/mruby-compiler/core/parse.y"
+#line 3914 "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 9907 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9911 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 329: /* @20: %empty  */
-#line 3916 "mrbgems/mruby-compiler/core/parse.y"
+#line 3920 "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 9918 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9922 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 330: /* primary: "'class'" cpath superclass @20 bodystmt "'end'"  */
-#line 3924 "mrbgems/mruby-compiler/core/parse.y"
+#line 3928 "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 9929 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9933 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 331: /* @21: %empty  */
-#line 3932 "mrbgems/mruby-compiler/core/parse.y"
+#line 3936 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.num) = p->in_def;
                       p->in_def = 0;
                     }
-#line 9938 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9942 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 332: /* @22: %empty  */
-#line 3937 "mrbgems/mruby-compiler/core/parse.y"
+#line 3941 "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 9948 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9952 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 333: /* primary: "'class'" "<<" expr @21 term @22 bodystmt "'end'"  */
-#line 3944 "mrbgems/mruby-compiler/core/parse.y"
+#line 3948 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_sclass(p, (yyvsp[-5].nd), (yyvsp[-1].nd));
                       SET_LINENO((yyval.nd), (yyvsp[-7].num));
@@ -9957,44 +9961,44 @@ yyreduce:
                       p->in_def = (yyvsp[-4].num);
                       p->in_single = node_to_int((yyvsp[-2].nd)->cdr);
                     }
-#line 9961 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9965 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 334: /* @23: %empty  */
-#line 3954 "mrbgems/mruby-compiler/core/parse.y"
+#line 3958 "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 9972 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9976 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 335: /* primary: "'module'" cpath @23 bodystmt "'end'"  */
-#line 3962 "mrbgems/mruby-compiler/core/parse.y"
+#line 3966 "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 9983 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9987 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 336: /* primary: defn_head f_arglist bodystmt "'end'"  */
-#line 3972 "mrbgems/mruby-compiler/core/parse.y"
+#line 3976 "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 9994 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9998 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 337: /* primary: defs_head f_arglist bodystmt "'end'"  */
-#line 3982 "mrbgems/mruby-compiler/core/parse.y"
+#line 3986 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-3].nd);
                       defs_setup(p, (yyval.nd), (yyvsp[-2].nd), (yyvsp[-1].nd));
@@ -10002,453 +10006,453 @@ yyreduce:
                       p->in_def--;
                       p->in_single--;
                     }
-#line 10006 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10010 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 338: /* primary: "'break'"  */
-#line 3990 "mrbgems/mruby-compiler/core/parse.y"
+#line 3994 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_break(p, 0);
                     }
-#line 10014 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10018 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 339: /* primary: "'next'"  */
-#line 3994 "mrbgems/mruby-compiler/core/parse.y"
+#line 3998 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_next(p, 0);
                     }
-#line 10022 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10026 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 340: /* primary: "'redo'"  */
-#line 3998 "mrbgems/mruby-compiler/core/parse.y"
+#line 4002 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_redo(p);
                     }
-#line 10030 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10034 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 341: /* primary: "'retry'"  */
-#line 4002 "mrbgems/mruby-compiler/core/parse.y"
+#line 4006 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_retry(p);
                     }
-#line 10038 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10042 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 342: /* primary_value: primary  */
-#line 4008 "mrbgems/mruby-compiler/core/parse.y"
+#line 4012 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                       if (!(yyval.nd)) (yyval.nd) = new_nil(p);
                     }
-#line 10047 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10051 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 349: /* if_tail: "'elsif'" expr_value then compstmt if_tail  */
-#line 4027 "mrbgems/mruby-compiler/core/parse.y"
+#line 4031 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_if(p, cond((yyvsp[-3].nd)), (yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 10055 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10059 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 351: /* opt_else: "'else'" compstmt  */
-#line 4034 "mrbgems/mruby-compiler/core/parse.y"
+#line 4038 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 10063 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10067 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 352: /* for_var: lhs  */
-#line 4040 "mrbgems/mruby-compiler/core/parse.y"
+#line 4044 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1(list1((yyvsp[0].nd)));
                     }
-#line 10071 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10075 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 354: /* f_margs: f_arg  */
-#line 4047 "mrbgems/mruby-compiler/core/parse.y"
+#line 4051 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3((yyvsp[0].nd),0,0);
                     }
-#line 10079 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10083 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 355: /* f_margs: f_arg ',' "*" f_norm_arg  */
-#line 4051 "mrbgems/mruby-compiler/core/parse.y"
+#line 4055 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3((yyvsp[-3].nd), new_arg(p, (yyvsp[0].id)), 0);
                     }
-#line 10087 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10091 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 356: /* f_margs: f_arg ',' "*" f_norm_arg ',' f_arg  */
-#line 4055 "mrbgems/mruby-compiler/core/parse.y"
+#line 4059 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3((yyvsp[-5].nd), new_arg(p, (yyvsp[-2].id)), (yyvsp[0].nd));
                     }
-#line 10095 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10099 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 357: /* f_margs: f_arg ',' "*"  */
-#line 4059 "mrbgems/mruby-compiler/core/parse.y"
+#line 4063 "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 10104 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10108 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 358: /* f_margs: f_arg ',' "*" ',' f_arg  */
-#line 4064 "mrbgems/mruby-compiler/core/parse.y"
+#line 4068 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3((yyvsp[-4].nd), int_to_node(-1), (yyvsp[0].nd));
                     }
-#line 10112 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10116 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 359: /* f_margs: "*" f_norm_arg  */
-#line 4068 "mrbgems/mruby-compiler/core/parse.y"
+#line 4072 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3(0, new_arg(p, (yyvsp[0].id)), 0);
                     }
-#line 10120 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10124 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 360: /* f_margs: "*" f_norm_arg ',' f_arg  */
-#line 4072 "mrbgems/mruby-compiler/core/parse.y"
+#line 4076 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3(0, new_arg(p, (yyvsp[-2].id)), (yyvsp[0].nd));
                     }
-#line 10128 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10132 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 361: /* f_margs: "*"  */
-#line 4076 "mrbgems/mruby-compiler/core/parse.y"
+#line 4080 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_f(p, intern_op(mul));
                       (yyval.nd) = list3(0, int_to_node(-1), 0);
                     }
-#line 10137 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10141 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 362: /* $@24: %empty  */
-#line 4081 "mrbgems/mruby-compiler/core/parse.y"
+#line 4085 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_f(p, intern_op(mul));
                     }
-#line 10145 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10149 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 363: /* f_margs: "*" ',' $@24 f_arg  */
-#line 4085 "mrbgems/mruby-compiler/core/parse.y"
+#line 4089 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3(0, int_to_node(-1), (yyvsp[0].nd));
                     }
-#line 10153 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10157 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 364: /* block_args_tail: f_block_kwarg ',' f_kwrest opt_f_block_arg  */
-#line 4091 "mrbgems/mruby-compiler/core/parse.y"
+#line 4095 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, (yyvsp[-3].nd), (yyvsp[-1].nd), (yyvsp[0].id));
                     }
-#line 10161 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10165 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 365: /* block_args_tail: f_block_kwarg opt_f_block_arg  */
-#line 4095 "mrbgems/mruby-compiler/core/parse.y"
+#line 4099 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, (yyvsp[-1].nd), 0, (yyvsp[0].id));
                     }
-#line 10169 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10173 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 366: /* block_args_tail: f_kwrest opt_f_block_arg  */
-#line 4099 "mrbgems/mruby-compiler/core/parse.y"
+#line 4103 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, 0, (yyvsp[-1].nd), (yyvsp[0].id));
                     }
-#line 10177 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10181 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 367: /* block_args_tail: f_block_arg  */
-#line 4103 "mrbgems/mruby-compiler/core/parse.y"
+#line 4107 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, 0, 0, (yyvsp[0].id));
                     }
-#line 10185 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10189 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 368: /* opt_block_args_tail: ',' block_args_tail  */
-#line 4109 "mrbgems/mruby-compiler/core/parse.y"
+#line 4113 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 10193 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10197 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 369: /* opt_block_args_tail: %empty  */
-#line 4113 "mrbgems/mruby-compiler/core/parse.y"
+#line 4117 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, 0, 0, 0);
                     }
-#line 10201 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10205 "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 4119 "mrbgems/mruby-compiler/core/parse.y"
+#line 4123 "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 10209 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10213 "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 4123 "mrbgems/mruby-compiler/core/parse.y"
+#line 4127 "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 10217 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10221 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 372: /* block_param: f_arg ',' f_block_optarg opt_block_args_tail  */
-#line 4127 "mrbgems/mruby-compiler/core/parse.y"
+#line 4131 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, (yyvsp[-3].nd), (yyvsp[-1].nd), 0, 0, (yyvsp[0].nd));
                     }
-#line 10225 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10229 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 373: /* block_param: f_arg ',' f_block_optarg ',' f_arg opt_block_args_tail  */
-#line 4131 "mrbgems/mruby-compiler/core/parse.y"
+#line 4135 "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 10233 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10237 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 374: /* block_param: f_arg ',' f_rest_arg opt_block_args_tail  */
-#line 4135 "mrbgems/mruby-compiler/core/parse.y"
+#line 4139 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, (yyvsp[-3].nd), 0, (yyvsp[-1].id), 0, (yyvsp[0].nd));
                     }
-#line 10241 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10245 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 375: /* block_param: f_arg ',' opt_block_args_tail  */
-#line 4139 "mrbgems/mruby-compiler/core/parse.y"
+#line 4143 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, (yyvsp[-2].nd), 0, 0, 0, (yyvsp[0].nd));
                     }
-#line 10249 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10253 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 376: /* block_param: f_arg ',' f_rest_arg ',' f_arg opt_block_args_tail  */
-#line 4143 "mrbgems/mruby-compiler/core/parse.y"
+#line 4147 "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 10257 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10261 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 377: /* block_param: f_arg opt_block_args_tail  */
-#line 4147 "mrbgems/mruby-compiler/core/parse.y"
+#line 4151 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, (yyvsp[-1].nd), 0, 0, 0, (yyvsp[0].nd));
                     }
-#line 10265 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10269 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 378: /* block_param: f_block_optarg ',' f_rest_arg opt_block_args_tail  */
-#line 4151 "mrbgems/mruby-compiler/core/parse.y"
+#line 4155 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, (yyvsp[-3].nd), (yyvsp[-1].id), 0, (yyvsp[0].nd));
                     }
-#line 10273 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10277 "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 4155 "mrbgems/mruby-compiler/core/parse.y"
+#line 4159 "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 10281 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10285 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 380: /* block_param: f_block_optarg opt_block_args_tail  */
-#line 4159 "mrbgems/mruby-compiler/core/parse.y"
+#line 4163 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, (yyvsp[-1].nd), 0, 0, (yyvsp[0].nd));
                     }
-#line 10289 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10293 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 381: /* block_param: f_block_optarg ',' f_arg opt_block_args_tail  */
-#line 4163 "mrbgems/mruby-compiler/core/parse.y"
+#line 4167 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, (yyvsp[-3].nd), 0, (yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 10297 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10301 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 382: /* block_param: f_rest_arg opt_block_args_tail  */
-#line 4167 "mrbgems/mruby-compiler/core/parse.y"
+#line 4171 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, 0, (yyvsp[-1].id), 0, (yyvsp[0].nd));
                     }
-#line 10305 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10309 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 383: /* block_param: f_rest_arg ',' f_arg opt_block_args_tail  */
-#line 4171 "mrbgems/mruby-compiler/core/parse.y"
+#line 4175 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, 0, (yyvsp[-3].id), (yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 10313 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10317 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 384: /* block_param: block_args_tail  */
-#line 4175 "mrbgems/mruby-compiler/core/parse.y"
+#line 4179 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, 0, 0, 0, (yyvsp[0].nd));
                     }
-#line 10321 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10325 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 385: /* opt_block_param: none  */
-#line 4181 "mrbgems/mruby-compiler/core/parse.y"
+#line 4185 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_blk(p);
                       (yyval.nd) = 0;
                     }
-#line 10330 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10334 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 386: /* opt_block_param: block_param_def  */
-#line 4186 "mrbgems/mruby-compiler/core/parse.y"
+#line 4190 "mrbgems/mruby-compiler/core/parse.y"
                    {
                       p->cmd_start = TRUE;
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 10339 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10343 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 387: /* $@25: %empty  */
-#line 4192 "mrbgems/mruby-compiler/core/parse.y"
+#line 4196 "mrbgems/mruby-compiler/core/parse.y"
                       {local_add_blk(p);}
-#line 10345 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10349 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 388: /* block_param_def: '|' $@25 opt_bv_decl '|'  */
-#line 4193 "mrbgems/mruby-compiler/core/parse.y"
+#line 4197 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = 0;
                     }
-#line 10353 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10357 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 389: /* block_param_def: "||"  */
-#line 4197 "mrbgems/mruby-compiler/core/parse.y"
+#line 4201 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_blk(p);
                       (yyval.nd) = 0;
                     }
-#line 10362 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10366 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 390: /* block_param_def: '|' block_param opt_bv_decl '|'  */
-#line 4202 "mrbgems/mruby-compiler/core/parse.y"
+#line 4206 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-2].nd);
                     }
-#line 10370 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10374 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 391: /* opt_bv_decl: opt_nl  */
-#line 4209 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = 0;
-                    }
-#line 10378 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 392: /* opt_bv_decl: opt_nl ';' bv_decls opt_nl  */
 #line 4213 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = 0;
                     }
-#line 10386 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10382 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 392: /* opt_bv_decl: opt_nl ';' bv_decls opt_nl  */
+#line 4217 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = 0;
+                    }
+#line 10390 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 395: /* bvar: "local variable or method"  */
-#line 4223 "mrbgems/mruby-compiler/core/parse.y"
+#line 4227 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_f(p, (yyvsp[0].id));
                       new_bv(p, (yyvsp[0].id));
                     }
-#line 10395 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10399 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 397: /* f_larglist: '(' f_args opt_bv_decl ')'  */
-#line 4231 "mrbgems/mruby-compiler/core/parse.y"
+#line 4235 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-2].nd);
                     }
-#line 10403 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10407 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 398: /* f_larglist: f_args  */
-#line 4235 "mrbgems/mruby-compiler/core/parse.y"
+#line 4239 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 10411 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10415 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 399: /* lambda_body: tLAMBEG compstmt '}'  */
-#line 4241 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = (yyvsp[-1].nd);
-                    }
-#line 10419 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 400: /* lambda_body: "'do' for lambda" bodystmt "'end'"  */
 #line 4245 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 10427 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10423 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 400: /* lambda_body: "'do' for lambda" bodystmt "'end'"  */
+#line 4249 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = (yyvsp[-1].nd);
+                    }
+#line 10431 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 401: /* @26: %empty  */
-#line 4251 "mrbgems/mruby-compiler/core/parse.y"
+#line 4255 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_nest(p);
                       nvars_nest(p);
                       (yyval.num) = p->lineno;
                     }
-#line 10437 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10441 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 402: /* do_block: "'do' for block" @26 opt_block_param bodystmt "'end'"  */
-#line 4259 "mrbgems/mruby-compiler/core/parse.y"
+#line 4263 "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 10448 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10452 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 403: /* block_call: command do_block  */
-#line 4268 "mrbgems/mruby-compiler/core/parse.y"
+#line 4272 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if (node_to_type((yyvsp[-1].nd)->car) == NODE_YIELD) {
                         yyerror(&(yylsp[-1]), p, "block given to yield");
@@ -10458,159 +10462,159 @@ yyreduce:
                       }
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 10462 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10466 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 404: /* block_call: block_call call_op2 operation2 opt_paren_args  */
-#line 4278 "mrbgems/mruby-compiler/core/parse.y"
+#line 4282 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), (yyvsp[-1].id), (yyvsp[0].nd), (yyvsp[-2].num));
                     }
-#line 10470 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10474 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 405: /* block_call: block_call call_op2 operation2 opt_paren_args brace_block  */
-#line 4282 "mrbgems/mruby-compiler/core/parse.y"
+#line 4286 "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 10479 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10483 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 406: /* block_call: block_call call_op2 operation2 command_args do_block  */
-#line 4287 "mrbgems/mruby-compiler/core/parse.y"
+#line 4291 "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 10488 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10492 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 407: /* method_call: operation paren_args  */
-#line 4294 "mrbgems/mruby-compiler/core/parse.y"
+#line 4298 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_fcall(p, (yyvsp[-1].id), (yyvsp[0].nd));
                     }
-#line 10496 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10500 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 408: /* method_call: primary_value call_op operation2 opt_paren_args  */
-#line 4298 "mrbgems/mruby-compiler/core/parse.y"
+#line 4302 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), (yyvsp[-1].id), (yyvsp[0].nd), (yyvsp[-2].num));
                     }
-#line 10504 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10508 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 409: /* method_call: primary_value "::" operation2 paren_args  */
-#line 4302 "mrbgems/mruby-compiler/core/parse.y"
+#line 4306 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), (yyvsp[-1].id), (yyvsp[0].nd), tCOLON2);
                     }
-#line 10512 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10516 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 410: /* method_call: primary_value "::" operation3  */
-#line 4306 "mrbgems/mruby-compiler/core/parse.y"
+#line 4310 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-2].nd), (yyvsp[0].id), 0, tCOLON2);
                     }
-#line 10520 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10524 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 411: /* method_call: primary_value call_op paren_args  */
-#line 4310 "mrbgems/mruby-compiler/core/parse.y"
+#line 4314 "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 10528 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10532 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 412: /* method_call: primary_value "::" paren_args  */
-#line 4314 "mrbgems/mruby-compiler/core/parse.y"
+#line 4318 "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 10536 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10540 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 413: /* method_call: "'super'" paren_args  */
-#line 4318 "mrbgems/mruby-compiler/core/parse.y"
+#line 4322 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_super(p, (yyvsp[0].nd));
                     }
-#line 10544 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10548 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 414: /* method_call: "'super'"  */
-#line 4322 "mrbgems/mruby-compiler/core/parse.y"
+#line 4326 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_zsuper(p);
                     }
-#line 10552 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10556 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 415: /* method_call: primary_value '[' opt_call_args ']'  */
-#line 4326 "mrbgems/mruby-compiler/core/parse.y"
+#line 4330 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), intern_op(aref), (yyvsp[-1].nd), '.');
                     }
-#line 10560 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10564 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 416: /* @27: %empty  */
-#line 4332 "mrbgems/mruby-compiler/core/parse.y"
+#line 4336 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_nest(p);
                       nvars_nest(p);
                       (yyval.num) = p->lineno;
                     }
-#line 10570 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10574 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 417: /* brace_block: '{' @27 opt_block_param compstmt '}'  */
-#line 4339 "mrbgems/mruby-compiler/core/parse.y"
+#line 4343 "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 10581 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10585 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 418: /* @28: %empty  */
-#line 4346 "mrbgems/mruby-compiler/core/parse.y"
+#line 4350 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_nest(p);
                       nvars_nest(p);
                       (yyval.num) = p->lineno;
                     }
-#line 10591 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10595 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 419: /* brace_block: "'do'" @28 opt_block_param bodystmt "'end'"  */
-#line 4353 "mrbgems/mruby-compiler/core/parse.y"
+#line 4357 "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 10602 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10606 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 420: /* case_body: "'when'" args then compstmt cases  */
-#line 4364 "mrbgems/mruby-compiler/core/parse.y"
+#line 4368 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = cons(cons((yyvsp[-3].nd), (yyvsp[-1].nd)), (yyvsp[0].nd));
                     }
-#line 10610 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10614 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 421: /* cases: opt_else  */
-#line 4370 "mrbgems/mruby-compiler/core/parse.y"
+#line 4374 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if ((yyvsp[0].nd)) {
                         (yyval.nd) = cons(cons(0, (yyvsp[0].nd)), 0);
@@ -10619,155 +10623,155 @@ yyreduce:
                         (yyval.nd) = 0;
                       }
                     }
-#line 10623 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10627 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 423: /* opt_rescue: "'rescue'" exc_list exc_var then compstmt opt_rescue  */
-#line 4384 "mrbgems/mruby-compiler/core/parse.y"
+#line 4388 "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 10632 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10636 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 425: /* exc_list: arg  */
-#line 4392 "mrbgems/mruby-compiler/core/parse.y"
+#line 4396 "mrbgems/mruby-compiler/core/parse.y"
                     {
                         (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 10640 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10644 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 428: /* exc_var: "=>" lhs  */
-#line 4400 "mrbgems/mruby-compiler/core/parse.y"
+#line 4404 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 10648 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10652 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 430: /* opt_ensure: "'ensure'" compstmt  */
-#line 4407 "mrbgems/mruby-compiler/core/parse.y"
+#line 4411 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 10656 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10660 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 437: /* string: string string_fragment  */
-#line 4421 "mrbgems/mruby-compiler/core/parse.y"
+#line 4425 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = append((yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 10664 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10668 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 438: /* string_fragment: "character literal"  */
-#line 4427 "mrbgems/mruby-compiler/core/parse.y"
+#line 4431 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       /* tCHAR is (len . str), wrap as cons list */
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 10673 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10677 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 439: /* string_fragment: tSTRING  */
-#line 4432 "mrbgems/mruby-compiler/core/parse.y"
+#line 4436 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       /* tSTRING is (len . str), wrap as cons list */
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 10682 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10686 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 440: /* string_fragment: "string literal" tSTRING  */
-#line 4437 "mrbgems/mruby-compiler/core/parse.y"
+#line 4441 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       /* $2 is (len . str), wrap as cons list */
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 10691 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10695 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 441: /* string_fragment: "string literal" string_rep tSTRING  */
-#line 4442 "mrbgems/mruby-compiler/core/parse.y"
+#line 4446 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 10699 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10703 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 443: /* string_rep: string_rep string_interp  */
-#line 4449 "mrbgems/mruby-compiler/core/parse.y"
+#line 4453 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = append((yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 10707 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10711 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 444: /* string_interp: tSTRING_MID  */
-#line 4455 "mrbgems/mruby-compiler/core/parse.y"
+#line 4459 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       /* $1 is already in (len . str) format */
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 10716 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10720 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 445: /* @29: %empty  */
-#line 4460 "mrbgems/mruby-compiler/core/parse.y"
+#line 4464 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push_strterm(p);
                     }
-#line 10724 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10728 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 446: /* string_interp: tSTRING_PART @29 compstmt '}'  */
-#line 4465 "mrbgems/mruby-compiler/core/parse.y"
+#line 4469 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       pop_strterm(p,(yyvsp[-2].nd));
                       /* $1 is already in (len . str) format, create (-1 . node) for expression */
                       node *expr_elem = cons(int_to_node(-1), (yyvsp[-1].nd));
                       (yyval.nd) = list2((yyvsp[-3].nd), expr_elem);
                     }
-#line 10735 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10739 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 447: /* string_interp: tLITERAL_DELIM  */
-#line 4472 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = list1(new_literal_delim(p));
-                    }
-#line 10743 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 448: /* string_interp: tHD_LITERAL_DELIM heredoc_bodies  */
 #line 4476 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1(new_literal_delim(p));
                     }
-#line 10751 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10747 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 448: /* string_interp: tHD_LITERAL_DELIM heredoc_bodies  */
+#line 4480 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = list1(new_literal_delim(p));
+                    }
+#line 10755 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 449: /* xstring: tXSTRING_BEG tXSTRING  */
-#line 4482 "mrbgems/mruby-compiler/core/parse.y"
+#line 4486 "mrbgems/mruby-compiler/core/parse.y"
                     {
                         (yyval.nd) = cons((yyvsp[0].nd), (node*)NULL);
                     }
-#line 10759 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10763 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 450: /* xstring: tXSTRING_BEG string_rep tXSTRING  */
-#line 4486 "mrbgems/mruby-compiler/core/parse.y"
+#line 4490 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 10767 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10771 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 451: /* regexp: tREGEXP_BEG tREGEXP  */
-#line 4492 "mrbgems/mruby-compiler/core/parse.y"
+#line 4496 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       node *data = (yyvsp[0].nd);  /* ((len . pattern) . (flags . encoding)) */
                       const char *flags = (const char*)data->cdr->car;
@@ -10776,11 +10780,11 @@ yyreduce:
                       node *pattern_list = cons(data->car, (node*)NULL);
                       (yyval.nd) = new_dregx(p, pattern_list, flags, encoding);
                     }
-#line 10780 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10784 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 452: /* regexp: tREGEXP_BEG string_rep tREGEXP  */
-#line 4501 "mrbgems/mruby-compiler/core/parse.y"
+#line 4505 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       node *data = (yyvsp[0].nd);  /* ((len . pattern) . (flags . encoding)) */
                       const char *flags = (const char*)data->cdr->car;
@@ -10789,47 +10793,47 @@ yyreduce:
                       node *complete_list = push((yyvsp[-1].nd), data->car);
                       (yyval.nd) = new_dregx(p, complete_list, flags, encoding);
                     }
-#line 10793 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10797 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 456: /* heredoc_body: tHEREDOC_END  */
-#line 4519 "mrbgems/mruby-compiler/core/parse.y"
+#line 4523 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       parser_heredoc_info *info = parsing_heredoc_info(p);
                       info->doc = push(info->doc, new_str_empty(p));
                       heredoc_end(p);
                     }
-#line 10803 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10807 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 457: /* heredoc_body: heredoc_string_rep tHEREDOC_END  */
-#line 4525 "mrbgems/mruby-compiler/core/parse.y"
+#line 4529 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       heredoc_end(p);
                     }
-#line 10811 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10815 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 460: /* heredoc_string_interp: tHD_STRING_MID  */
-#line 4535 "mrbgems/mruby-compiler/core/parse.y"
+#line 4539 "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 10821 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10825 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 461: /* @30: %empty  */
-#line 4541 "mrbgems/mruby-compiler/core/parse.y"
+#line 4545 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push_strterm(p);
                     }
-#line 10829 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10833 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 462: /* heredoc_string_interp: tHD_STRING_PART @30 compstmt '}'  */
-#line 4546 "mrbgems/mruby-compiler/core/parse.y"
+#line 4550 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       pop_strterm(p, (yyvsp[-2].nd));
                       parser_heredoc_info *info = parsing_heredoc_info(p);
@@ -10837,37 +10841,37 @@ yyreduce:
                       node *expr_elem = cons(int_to_node(-1), (yyvsp[-1].nd));
                       info->doc = push(push(info->doc, (yyvsp[-3].nd)), expr_elem);
                     }
-#line 10841 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10845 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 463: /* words: tWORDS_BEG tSTRING  */
-#line 4556 "mrbgems/mruby-compiler/core/parse.y"
+#line 4560 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_words(p, list1((yyvsp[0].nd)));
                     }
-#line 10849 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10853 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 464: /* words: tWORDS_BEG string_rep tSTRING  */
-#line 4560 "mrbgems/mruby-compiler/core/parse.y"
+#line 4564 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       node *n = (yyvsp[-1].nd);
                       n = push(n, (yyvsp[0].nd));
                       (yyval.nd) = new_words(p, n);
                     }
-#line 10859 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10863 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 465: /* symbol: basic_symbol  */
-#line 4569 "mrbgems/mruby-compiler/core/parse.y"
+#line 4573 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_sym(p, (yyvsp[0].id));
                     }
-#line 10867 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10871 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 466: /* symbol: "symbol" "string literal" string_rep tSTRING  */
-#line 4573 "mrbgems/mruby-compiler/core/parse.y"
+#line 4577 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       node *n = (yyvsp[-1].nd);
                       p->lstate = EXPR_ENDARG;
@@ -10879,183 +10883,183 @@ yyreduce:
                       }
                       (yyval.nd) = new_dsym(p, new_str(p, n));
                     }
-#line 10883 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10887 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 467: /* symbol: "symbol" "numbered parameter"  */
-#line 4585 "mrbgems/mruby-compiler/core/parse.y"
+#line 4589 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       mrb_sym sym = intern_numparam((yyvsp[0].num));
                       (yyval.nd) = new_sym(p, sym);
                     }
-#line 10892 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10896 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 468: /* basic_symbol: "symbol" sym  */
-#line 4592 "mrbgems/mruby-compiler/core/parse.y"
+#line 4596 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->lstate = EXPR_END;
                       (yyval.id) = (yyvsp[0].id);
                     }
-#line 10901 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10905 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 473: /* sym: tSTRING  */
-#line 4603 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.id) = new_strsym(p, (yyvsp[0].nd));
-                    }
-#line 10909 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 474: /* sym: "string literal" tSTRING  */
 #line 4607 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.id) = new_strsym(p, (yyvsp[0].nd));
                     }
-#line 10917 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10913 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 474: /* sym: "string literal" tSTRING  */
+#line 4611 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.id) = new_strsym(p, (yyvsp[0].nd));
+                    }
+#line 10921 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 475: /* symbols: tSYMBOLS_BEG tSTRING  */
-#line 4613 "mrbgems/mruby-compiler/core/parse.y"
+#line 4617 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_symbols(p, list1((yyvsp[0].nd)));
                     }
-#line 10925 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10929 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 476: /* symbols: tSYMBOLS_BEG string_rep tSTRING  */
-#line 4617 "mrbgems/mruby-compiler/core/parse.y"
+#line 4621 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       node *n = (yyvsp[-1].nd);
                       n = push(n, (yyvsp[0].nd));
                       (yyval.nd) = new_symbols(p, n);
                     }
-#line 10935 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10939 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 479: /* numeric: tUMINUS_NUM "integer literal"  */
-#line 4627 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_negate(p, (yyvsp[0].nd));
-                    }
-#line 10943 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 480: /* numeric: tUMINUS_NUM "float literal"  */
 #line 4631 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_negate(p, (yyvsp[0].nd));
                     }
-#line 10951 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10947 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 480: /* numeric: tUMINUS_NUM "float literal"  */
+#line 4635 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_negate(p, (yyvsp[0].nd));
+                    }
+#line 10955 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 481: /* variable: "local variable or method"  */
-#line 4637 "mrbgems/mruby-compiler/core/parse.y"
+#line 4641 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_lvar(p, (yyvsp[0].id));
                     }
-#line 10959 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10963 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 482: /* variable: "instance variable"  */
-#line 4641 "mrbgems/mruby-compiler/core/parse.y"
+#line 4645 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_ivar(p, (yyvsp[0].id));
                     }
-#line 10967 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10971 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 483: /* variable: "global variable"  */
-#line 4645 "mrbgems/mruby-compiler/core/parse.y"
+#line 4649 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_gvar(p, (yyvsp[0].id));
                     }
-#line 10975 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10979 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 484: /* variable: "class variable"  */
-#line 4649 "mrbgems/mruby-compiler/core/parse.y"
+#line 4653 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_cvar(p, (yyvsp[0].id));
                     }
-#line 10983 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10987 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 485: /* variable: "constant"  */
-#line 4653 "mrbgems/mruby-compiler/core/parse.y"
+#line 4657 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_const(p, (yyvsp[0].id));
                     }
-#line 10991 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10995 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 486: /* var_lhs: variable  */
-#line 4659 "mrbgems/mruby-compiler/core/parse.y"
+#line 4663 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       assignable(p, (yyvsp[0].nd));
                     }
-#line 10999 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11003 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 487: /* var_lhs: "numbered parameter"  */
-#line 4663 "mrbgems/mruby-compiler/core/parse.y"
+#line 4667 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[0]), p, "can't assign to numbered parameter");
                     }
-#line 11007 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11011 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 488: /* var_ref: variable  */
-#line 4669 "mrbgems/mruby-compiler/core/parse.y"
+#line 4673 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = var_reference(p, (yyvsp[0].nd));
                     }
-#line 11015 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11019 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 489: /* var_ref: "numbered parameter"  */
-#line 4673 "mrbgems/mruby-compiler/core/parse.y"
+#line 4677 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_nvar(p, (yyvsp[0].num));
                     }
-#line 11023 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11027 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 490: /* var_ref: "'nil'"  */
-#line 4677 "mrbgems/mruby-compiler/core/parse.y"
+#line 4681 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_nil(p);
                     }
-#line 11031 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11035 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 491: /* var_ref: "'self'"  */
-#line 4681 "mrbgems/mruby-compiler/core/parse.y"
+#line 4685 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_self(p);
                     }
-#line 11039 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11043 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 492: /* var_ref: "'true'"  */
-#line 4685 "mrbgems/mruby-compiler/core/parse.y"
+#line 4689 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_true(p);
                     }
-#line 11047 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11051 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 493: /* var_ref: "'false'"  */
-#line 4689 "mrbgems/mruby-compiler/core/parse.y"
+#line 4693 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_false(p);
                     }
-#line 11055 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11059 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 494: /* var_ref: "'__FILE__'"  */
-#line 4693 "mrbgems/mruby-compiler/core/parse.y"
+#line 4697 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       const char *fn = mrb_sym_name_len(p->mrb, p->filename_sym, NULL);
                       if (!fn) {
@@ -11063,686 +11067,686 @@ yyreduce:
                       }
                       (yyval.nd) = new_str(p, cons(cons(int_to_node(strlen(fn)), (node*)fn), (node*)NULL));
                     }
-#line 11067 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11071 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 495: /* var_ref: "'__LINE__'"  */
-#line 4701 "mrbgems/mruby-compiler/core/parse.y"
+#line 4705 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       char buf[16];
 
                       dump_int(p->lineno, buf);
                       (yyval.nd) = new_int(p, buf, 10, 0);
                     }
-#line 11078 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11082 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 496: /* var_ref: "'__ENCODING__'"  */
-#line 4708 "mrbgems/mruby-compiler/core/parse.y"
+#line 4712 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_fcall(p, MRB_SYM_2(p->mrb, __ENCODING__), 0);
                     }
-#line 11086 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11090 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 499: /* superclass: %empty  */
-#line 4718 "mrbgems/mruby-compiler/core/parse.y"
+#line 4722 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = 0;
                     }
-#line 11094 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11098 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 500: /* $@31: %empty  */
-#line 4722 "mrbgems/mruby-compiler/core/parse.y"
+#line 4726 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->lstate = EXPR_BEG;
                       p->cmd_start = TRUE;
                     }
-#line 11103 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11107 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 501: /* superclass: '<' $@31 expr_value term  */
-#line 4727 "mrbgems/mruby-compiler/core/parse.y"
+#line 4731 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 11111 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11115 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 504: /* f_arglist_paren: '(' f_args rparen  */
-#line 4743 "mrbgems/mruby-compiler/core/parse.y"
+#line 4747 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                       p->lstate = EXPR_BEG;
                       p->cmd_start = TRUE;
                     }
-#line 11121 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11125 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 505: /* f_arglist_paren: '(' f_arg ',' tBDOT3 rparen  */
-#line 4749 "mrbgems/mruby-compiler/core/parse.y"
+#line 4753 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_dots(p, (yyvsp[-3].nd));
                     }
-#line 11129 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11133 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 506: /* f_arglist_paren: '(' tBDOT3 rparen  */
-#line 4753 "mrbgems/mruby-compiler/core/parse.y"
+#line 4757 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_dots(p, 0);
                     }
-#line 11137 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11141 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 508: /* f_arglist: f_args term  */
-#line 4760 "mrbgems/mruby-compiler/core/parse.y"
+#line 4764 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 11145 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11149 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 509: /* f_arglist: f_arg ',' tBDOT3 term  */
-#line 4764 "mrbgems/mruby-compiler/core/parse.y"
+#line 4768 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_dots(p, (yyvsp[-3].nd));
                     }
-#line 11153 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11157 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 510: /* f_arglist: "..." term  */
-#line 4768 "mrbgems/mruby-compiler/core/parse.y"
+#line 4772 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_dots(p, 0);
                     }
-#line 11161 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11165 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 511: /* f_label: "local variable or method" "label"  */
-#line 4774 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      local_nest(p);
-                    }
-#line 11169 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 512: /* f_label: "numbered parameter" "label"  */
 #line 4778 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_nest(p);
                     }
-#line 11177 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11173 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 512: /* f_label: "numbered parameter" "label"  */
+#line 4782 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      local_nest(p);
+                    }
+#line 11181 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 513: /* f_kw: f_label arg  */
-#line 4784 "mrbgems/mruby-compiler/core/parse.y"
+#line 4788 "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 11187 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11191 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 514: /* f_kw: f_label  */
-#line 4790 "mrbgems/mruby-compiler/core/parse.y"
+#line 4794 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_kw_arg(p, (yyvsp[0].id), 0);
                       local_unnest(p);
                     }
-#line 11196 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11200 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 515: /* f_block_kw: f_label primary_value  */
-#line 4797 "mrbgems/mruby-compiler/core/parse.y"
+#line 4801 "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 11206 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11210 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 516: /* f_block_kw: f_label  */
-#line 4803 "mrbgems/mruby-compiler/core/parse.y"
+#line 4807 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_kw_arg(p, (yyvsp[0].id), 0);
                       local_unnest(p);
                     }
-#line 11215 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11219 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 517: /* f_block_kwarg: f_block_kw  */
-#line 4810 "mrbgems/mruby-compiler/core/parse.y"
+#line 4814 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 11223 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11227 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 518: /* f_block_kwarg: f_block_kwarg ',' f_block_kw  */
-#line 4814 "mrbgems/mruby-compiler/core/parse.y"
+#line 4818 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 11231 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11235 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 519: /* f_kwarg: f_kw  */
-#line 4820 "mrbgems/mruby-compiler/core/parse.y"
+#line 4824 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 11239 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11243 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 520: /* f_kwarg: f_kwarg ',' f_kw  */
-#line 4824 "mrbgems/mruby-compiler/core/parse.y"
+#line 4828 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 11247 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11251 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 523: /* f_kwrest: kwrest_mark "local variable or method"  */
-#line 4834 "mrbgems/mruby-compiler/core/parse.y"
+#line 4838 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_kw_rest_args(p, (yyvsp[0].id));
                     }
-#line 11255 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11259 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 524: /* f_kwrest: kwrest_mark  */
-#line 4838 "mrbgems/mruby-compiler/core/parse.y"
+#line 4842 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_kw_rest_args(p, 0);
                     }
-#line 11263 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11267 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 525: /* args_tail: f_kwarg ',' f_kwrest opt_f_block_arg  */
-#line 4844 "mrbgems/mruby-compiler/core/parse.y"
+#line 4848 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, (yyvsp[-3].nd), (yyvsp[-1].nd), (yyvsp[0].id));
                     }
-#line 11271 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11275 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 526: /* args_tail: f_kwarg opt_f_block_arg  */
-#line 4848 "mrbgems/mruby-compiler/core/parse.y"
+#line 4852 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, (yyvsp[-1].nd), 0, (yyvsp[0].id));
                     }
-#line 11279 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11283 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 527: /* args_tail: f_kwrest opt_f_block_arg  */
-#line 4852 "mrbgems/mruby-compiler/core/parse.y"
+#line 4856 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, 0, (yyvsp[-1].nd), (yyvsp[0].id));
                     }
-#line 11287 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11291 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 528: /* args_tail: f_block_arg  */
-#line 4856 "mrbgems/mruby-compiler/core/parse.y"
+#line 4860 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, 0, 0, (yyvsp[0].id));
                     }
-#line 11295 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11299 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 529: /* opt_args_tail: ',' args_tail  */
-#line 4862 "mrbgems/mruby-compiler/core/parse.y"
+#line 4866 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 11303 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11307 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 530: /* opt_args_tail: %empty  */
-#line 4866 "mrbgems/mruby-compiler/core/parse.y"
+#line 4870 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, 0, 0, 0);
                     }
-#line 11311 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11315 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 531: /* f_args: f_arg ',' f_optarg ',' f_rest_arg opt_args_tail  */
-#line 4872 "mrbgems/mruby-compiler/core/parse.y"
+#line 4876 "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 11319 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11323 "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 4876 "mrbgems/mruby-compiler/core/parse.y"
+#line 4880 "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 11327 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11331 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 533: /* f_args: f_arg ',' f_optarg opt_args_tail  */
-#line 4880 "mrbgems/mruby-compiler/core/parse.y"
+#line 4884 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, (yyvsp[-3].nd), (yyvsp[-1].nd), 0, 0, (yyvsp[0].nd));
                     }
-#line 11335 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11339 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 534: /* f_args: f_arg ',' f_optarg ',' f_arg opt_args_tail  */
-#line 4884 "mrbgems/mruby-compiler/core/parse.y"
+#line 4888 "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 11343 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11347 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 535: /* f_args: f_arg ',' f_rest_arg opt_args_tail  */
-#line 4888 "mrbgems/mruby-compiler/core/parse.y"
+#line 4892 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, (yyvsp[-3].nd), 0, (yyvsp[-1].id), 0, (yyvsp[0].nd));
                     }
-#line 11351 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11355 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 536: /* f_args: f_arg ',' f_rest_arg ',' f_arg opt_args_tail  */
-#line 4892 "mrbgems/mruby-compiler/core/parse.y"
+#line 4896 "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 11359 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11363 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 537: /* f_args: f_arg opt_args_tail  */
-#line 4896 "mrbgems/mruby-compiler/core/parse.y"
+#line 4900 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, (yyvsp[-1].nd), 0, 0, 0, (yyvsp[0].nd));
                     }
-#line 11367 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11371 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 538: /* f_args: f_optarg ',' f_rest_arg opt_args_tail  */
-#line 4900 "mrbgems/mruby-compiler/core/parse.y"
+#line 4904 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, (yyvsp[-3].nd), (yyvsp[-1].id), 0, (yyvsp[0].nd));
                     }
-#line 11375 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11379 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 539: /* f_args: f_optarg ',' f_rest_arg ',' f_arg opt_args_tail  */
-#line 4904 "mrbgems/mruby-compiler/core/parse.y"
+#line 4908 "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 11383 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11387 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 540: /* f_args: f_optarg opt_args_tail  */
-#line 4908 "mrbgems/mruby-compiler/core/parse.y"
+#line 4912 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, (yyvsp[-1].nd), 0, 0, (yyvsp[0].nd));
                     }
-#line 11391 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11395 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 541: /* f_args: f_optarg ',' f_arg opt_args_tail  */
-#line 4912 "mrbgems/mruby-compiler/core/parse.y"
+#line 4916 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, (yyvsp[-3].nd), 0, (yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 11399 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11403 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 542: /* f_args: f_rest_arg opt_args_tail  */
-#line 4916 "mrbgems/mruby-compiler/core/parse.y"
+#line 4920 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, 0, (yyvsp[-1].id), 0, (yyvsp[0].nd));
                     }
-#line 11407 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11411 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 543: /* f_args: f_rest_arg ',' f_arg opt_args_tail  */
-#line 4920 "mrbgems/mruby-compiler/core/parse.y"
+#line 4924 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, 0, (yyvsp[-3].id), (yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 11415 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11419 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 544: /* f_args: args_tail  */
-#line 4924 "mrbgems/mruby-compiler/core/parse.y"
+#line 4928 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, 0, 0, 0, (yyvsp[0].nd));
                     }
-#line 11423 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11427 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 545: /* f_args: %empty  */
-#line 4928 "mrbgems/mruby-compiler/core/parse.y"
+#line 4932 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_f(p, 0);
                       (yyval.nd) = new_args(p, 0, 0, 0, 0, 0);
                     }
-#line 11432 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11436 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 546: /* f_bad_arg: "constant"  */
-#line 4935 "mrbgems/mruby-compiler/core/parse.y"
+#line 4939 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[0]), p, "formal argument cannot be a constant");
                       (yyval.nd) = 0;
                     }
-#line 11441 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11445 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 547: /* f_bad_arg: "instance variable"  */
-#line 4940 "mrbgems/mruby-compiler/core/parse.y"
+#line 4944 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[0]), p, "formal argument cannot be an instance variable");
                       (yyval.nd) = 0;
                     }
-#line 11450 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11454 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 548: /* f_bad_arg: "global variable"  */
-#line 4945 "mrbgems/mruby-compiler/core/parse.y"
+#line 4949 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[0]), p, "formal argument cannot be a global variable");
                       (yyval.nd) = 0;
                     }
-#line 11459 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11463 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 549: /* f_bad_arg: "class variable"  */
-#line 4950 "mrbgems/mruby-compiler/core/parse.y"
+#line 4954 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[0]), p, "formal argument cannot be a class variable");
                       (yyval.nd) = 0;
                     }
-#line 11468 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11472 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 550: /* f_bad_arg: "numbered parameter"  */
-#line 4955 "mrbgems/mruby-compiler/core/parse.y"
+#line 4959 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[0]), p, "formal argument cannot be a numbered parameter");
                       (yyval.nd) = 0;
                     }
-#line 11477 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11481 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 551: /* f_norm_arg: f_bad_arg  */
-#line 4962 "mrbgems/mruby-compiler/core/parse.y"
+#line 4966 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.id) = 0;
                     }
-#line 11485 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11489 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 552: /* f_norm_arg: "local variable or method"  */
-#line 4966 "mrbgems/mruby-compiler/core/parse.y"
+#line 4970 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_f(p, (yyvsp[0].id));
                       (yyval.id) = (yyvsp[0].id);
                     }
-#line 11494 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11498 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 553: /* f_arg_item: f_norm_arg  */
-#line 4973 "mrbgems/mruby-compiler/core/parse.y"
+#line 4977 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_arg(p, (yyvsp[0].id));
                     }
-#line 11502 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11506 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 554: /* @32: %empty  */
-#line 4977 "mrbgems/mruby-compiler/core/parse.y"
+#line 4981 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = local_switch(p);
                     }
-#line 11510 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11514 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 555: /* f_arg_item: tLPAREN @32 f_margs rparen  */
-#line 4981 "mrbgems/mruby-compiler/core/parse.y"
+#line 4985 "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 11520 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11524 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 556: /* f_arg: f_arg_item  */
-#line 4989 "mrbgems/mruby-compiler/core/parse.y"
+#line 4993 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 11528 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11532 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 557: /* f_arg: f_arg ',' f_arg_item  */
-#line 4993 "mrbgems/mruby-compiler/core/parse.y"
+#line 4997 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 11536 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11540 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 558: /* f_opt_asgn: "local variable or method" '='  */
-#line 4999 "mrbgems/mruby-compiler/core/parse.y"
+#line 5003 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_f(p, (yyvsp[-1].id));
                       local_nest(p);
                       (yyval.id) = (yyvsp[-1].id);
                     }
-#line 11546 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11550 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 559: /* f_opt: f_opt_asgn arg  */
-#line 5007 "mrbgems/mruby-compiler/core/parse.y"
+#line 5011 "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 11556 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11560 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 560: /* f_block_opt: f_opt_asgn primary_value  */
-#line 5015 "mrbgems/mruby-compiler/core/parse.y"
+#line 5019 "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 11566 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11570 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 561: /* f_block_optarg: f_block_opt  */
-#line 5023 "mrbgems/mruby-compiler/core/parse.y"
+#line 5027 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 11574 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11578 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 562: /* f_block_optarg: f_block_optarg ',' f_block_opt  */
-#line 5027 "mrbgems/mruby-compiler/core/parse.y"
+#line 5031 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 11582 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11586 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 563: /* f_optarg: f_opt  */
-#line 5033 "mrbgems/mruby-compiler/core/parse.y"
+#line 5037 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 11590 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11594 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 564: /* f_optarg: f_optarg ',' f_opt  */
-#line 5037 "mrbgems/mruby-compiler/core/parse.y"
+#line 5041 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 11598 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11602 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 567: /* f_rest_arg: restarg_mark "local variable or method"  */
-#line 5047 "mrbgems/mruby-compiler/core/parse.y"
+#line 5051 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_f(p, (yyvsp[0].id));
                       (yyval.id) = (yyvsp[0].id);
                     }
-#line 11607 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11611 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 568: /* f_rest_arg: restarg_mark  */
-#line 5052 "mrbgems/mruby-compiler/core/parse.y"
+#line 5056 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.id) = intern_op(mul);
                       local_add_f(p, (yyval.id));
                     }
-#line 11616 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11620 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 571: /* f_block_arg: blkarg_mark "local variable or method"  */
-#line 5063 "mrbgems/mruby-compiler/core/parse.y"
+#line 5067 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.id) = (yyvsp[0].id);
                     }
-#line 11624 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11628 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 572: /* f_block_arg: blkarg_mark  */
-#line 5067 "mrbgems/mruby-compiler/core/parse.y"
+#line 5071 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.id) = intern_op(and);
                     }
-#line 11632 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11636 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 573: /* opt_f_block_arg: ',' f_block_arg  */
-#line 5073 "mrbgems/mruby-compiler/core/parse.y"
+#line 5077 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.id) = (yyvsp[0].id);
                     }
-#line 11640 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11644 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 574: /* opt_f_block_arg: none  */
-#line 5077 "mrbgems/mruby-compiler/core/parse.y"
+#line 5081 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.id) = 0;
                     }
-#line 11648 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11652 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 575: /* singleton: var_ref  */
-#line 5083 "mrbgems/mruby-compiler/core/parse.y"
+#line 5087 "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 11658 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11662 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 576: /* $@33: %empty  */
-#line 5088 "mrbgems/mruby-compiler/core/parse.y"
+#line 5092 "mrbgems/mruby-compiler/core/parse.y"
                       {p->lstate = EXPR_BEG;}
-#line 11664 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11668 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 577: /* singleton: '(' $@33 expr rparen  */
-#line 5089 "mrbgems/mruby-compiler/core/parse.y"
+#line 5093 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       prohibit_literals(p, (yyvsp[-1].nd));
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 11673 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11677 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 579: /* assoc_list: assocs trailer  */
-#line 5097 "mrbgems/mruby-compiler/core/parse.y"
+#line 5101 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 11681 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11685 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 580: /* assocs: assoc  */
-#line 5103 "mrbgems/mruby-compiler/core/parse.y"
+#line 5107 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 11689 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11693 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 581: /* assocs: assocs comma assoc  */
-#line 5107 "mrbgems/mruby-compiler/core/parse.y"
+#line 5111 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 11697 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11701 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 582: /* assoc: arg "=>" arg  */
-#line 5113 "mrbgems/mruby-compiler/core/parse.y"
+#line 5117 "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 11707 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11711 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 583: /* assoc: "local variable or method" "label" arg  */
-#line 5119 "mrbgems/mruby-compiler/core/parse.y"
+#line 5123 "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 11716 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11720 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 584: /* assoc: "local variable or method" "label"  */
-#line 5124 "mrbgems/mruby-compiler/core/parse.y"
+#line 5128 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = cons(new_sym(p, (yyvsp[-1].id)), label_reference(p, (yyvsp[-1].id)));
                     }
-#line 11724 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11728 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 585: /* assoc: "numbered parameter" "label"  */
-#line 5128 "mrbgems/mruby-compiler/core/parse.y"
+#line 5132 "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 11733 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11737 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 586: /* assoc: "numbered parameter" "label" arg  */
-#line 5133 "mrbgems/mruby-compiler/core/parse.y"
+#line 5137 "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 11742 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11746 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 587: /* assoc: string_fragment "label" arg  */
-#line 5138 "mrbgems/mruby-compiler/core/parse.y"
+#line 5142 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       void_expr_error(p, (yyvsp[0].nd));
                       if ((yyvsp[-2].nd)->cdr) {
@@ -11758,75 +11762,75 @@ yyreduce:
                         (yyval.nd) = cons(new_sym(p, new_strsym(p, (yyvsp[-2].nd)->car)), (yyvsp[0].nd));
                       }
                     }
-#line 11762 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11766 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 588: /* assoc: "**" arg  */
-#line 5154 "mrbgems/mruby-compiler/core/parse.y"
+#line 5158 "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 11771 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11775 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 589: /* assoc: "**"  */
-#line 5159 "mrbgems/mruby-compiler/core/parse.y"
+#line 5163 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = cons(new_kw_rest_args(p, 0), new_lvar(p, intern_op(pow)));
                     }
-#line 11779 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11783 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 602: /* call_op: '.'  */
-#line 5185 "mrbgems/mruby-compiler/core/parse.y"
+#line 5189 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.num) = '.';
                     }
-#line 11787 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11791 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 603: /* call_op: "&."  */
-#line 5189 "mrbgems/mruby-compiler/core/parse.y"
+#line 5193 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.num) = 0;
                     }
-#line 11795 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11799 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 605: /* call_op2: "::"  */
-#line 5196 "mrbgems/mruby-compiler/core/parse.y"
+#line 5200 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.num) = tCOLON2;
                     }
-#line 11803 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11807 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 614: /* term: ';'  */
-#line 5217 "mrbgems/mruby-compiler/core/parse.y"
+#line 5221 "mrbgems/mruby-compiler/core/parse.y"
                       {yyerrok;}
-#line 11809 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11813 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 616: /* nl: '\n'  */
-#line 5222 "mrbgems/mruby-compiler/core/parse.y"
+#line 5226 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->lineno += (yyvsp[0].num);
                       p->column = 0;
                     }
-#line 11818 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11822 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 620: /* none: %empty  */
-#line 5234 "mrbgems/mruby-compiler/core/parse.y"
+#line 5238 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = 0;
                     }
-#line 11826 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11830 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
 
-#line 11830 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11834 "mrbgems/mruby-compiler/core/y.tab.c"
 
       default: break;
     }
@@ -12059,7 +12063,7 @@ yyreturnlab:
   return yyresult;
 }
 
-#line 5238 "mrbgems/mruby-compiler/core/parse.y"
+#line 5242 "mrbgems/mruby-compiler/core/parse.y"
 
 #define pylval  (*((YYSTYPE*)(p->ylval)))