diff --git a/include/mruby/compile.h b/include/mruby/compile.h
index 6b1b0ec23..70cf9a93b 100644
--- a/include/mruby/compile.h
+++ b/include/mruby/compile.h
@@ -127,7 +127,7 @@ struct mrb_parser_state {
   int column;
 
   enum mrb_lex_state_enum lstate;
-  mrb_ast_node *lex_strterm; /* (type nest_level beg . end) */
+  struct parser_lex_strterm *lex_strterm;
 
   unsigned int cond_stack;
   unsigned int cmdarg_stack;
@@ -143,10 +143,8 @@ struct mrb_parser_state {
   int tidx;
   int tsiz;
 
-  mrb_ast_node *all_heredocs; /* list of mrb_parser_heredoc_info* */
   mrb_ast_node *heredocs_from_nextline;
   mrb_ast_node *parsing_heredoc;
-  mrb_ast_node *lex_strterm_before_heredoc;
 
   void *ylval;
 
diff --git a/mrbgems/mruby-compiler/core/parse.y b/mrbgems/mruby-compiler/core/parse.y
index a4e2dda40..09e339710 100644
--- a/mrbgems/mruby-compiler/core/parse.y
+++ b/mrbgems/mruby-compiler/core/parse.y
@@ -1345,19 +1345,50 @@ label_reference(parser_state *p, mrb_sym sym)
 
 typedef enum mrb_string_type  string_type;
 
-static node*
+typedef struct parser_lex_strterm {
+  int type;
+  int level;
+  int term;
+  int paren;
+  struct parser_lex_strterm *prev;
+} parser_lex_strterm;
+
+static parser_lex_strterm*
 new_strterm(parser_state *p, string_type type, int term, int paren)
 {
-  return cons(nint(type), cons(nint(0), cons(nint(paren), nint(term))));
+  parser_lex_strterm *lex = (parser_lex_strterm*)parser_palloc(p, sizeof(parser_lex_strterm));
+  lex->type = type;
+  lex->level = 0;
+  lex->term = term;
+  lex->paren = paren;
+  lex->prev = p->lex_strterm;
+  return lex;
 }
 
 static void
 end_strterm(parser_state *p)
 {
-  cons_free(p->lex_strterm->cdr->cdr);
-  cons_free(p->lex_strterm->cdr);
-  cons_free(p->lex_strterm);
+  parser_lex_strterm *term = p->lex_strterm->prev;
+  if (sizeof(node) < sizeof(parser_lex_strterm)) {
+    cons_free((node*)p->lex_strterm);
+  }
+  p->lex_strterm = term;
+}
+
+static node*
+push_strterm(parser_state *p)
+{
+  node *n = cons((node*)p->lex_strterm, p->parsing_heredoc);
   p->lex_strterm = NULL;
+  return n;
+}
+
+static void
+pop_strterm(parser_state *p, node *n)
+{
+  p->lex_strterm = (parser_lex_strterm*)n->car;
+  p->parsing_heredoc = n->cdr;
+  cons_free(n);
 }
 
 static parser_heredoc_info *
@@ -1373,28 +1404,11 @@ parsing_heredoc_info(parser_state *p)
 static void
 heredoc_treat_nextline(parser_state *p)
 {
-  if (p->heredocs_from_nextline == NULL)
-    return;
-  if (p->parsing_heredoc == NULL) {
-    p->all_heredocs = append(p->all_heredocs, p->heredocs_from_nextline);
-  }
-  else {
-    if (p->all_heredocs == p->parsing_heredoc) {
-      p->all_heredocs = append(p->heredocs_from_nextline, p->all_heredocs);
-    }
-    else {
-      node *n = p->all_heredocs;
-      mrb_assert(n != NULL);
-      append(p->heredocs_from_nextline, p->parsing_heredoc);
-      while (n->cdr != p->parsing_heredoc) {
-        n = n->cdr;
-        mrb_assert(n != NULL);
-      }
-      n->cdr = p->heredocs_from_nextline;
-    }
+  if (p->heredocs_from_nextline == NULL) return;
+  if (p->parsing_heredoc && p->lex_strterm) {
+    append(p->heredocs_from_nextline, p->parsing_heredoc);
   }
   p->parsing_heredoc = p->heredocs_from_nextline;
-  p->lex_strterm_before_heredoc = p->lex_strterm;
   p->lex_strterm = new_strterm(p, parsing_heredoc_info(p)->type, 0, 0);
   p->heredocs_from_nextline = NULL;
 }
@@ -1406,15 +1420,13 @@ heredoc_end(parser_state *p)
   if (p->parsing_heredoc == NULL) {
     p->lstate = EXPR_BEG;
     end_strterm(p);
-    p->lex_strterm = p->lex_strterm_before_heredoc;
-    p->lex_strterm_before_heredoc = NULL;
   }
   else {
     /* next heredoc */
-    p->lex_strterm->car = nint(parsing_heredoc_info(p)->type);
+    p->lex_strterm->type = parsing_heredoc_info(p)->type;
   }
 }
-#define is_strterm_type(p,str_func) (intn((p)->lex_strterm->car) & (str_func))
+#define is_strterm_type(p,str_func) ((p)->lex_strterm->type & (str_func))
 
 /* xxx ----------------------------- */
 
@@ -3347,13 +3359,12 @@ string_interp   : tSTRING_MID
                     }
                 | tSTRING_PART
                     {
-                      $<nd>$ = p->lex_strterm;
-                      p->lex_strterm = NULL;
+                      $<nd>$ = push_strterm(p);
                     }
                   compstmt
                   '}'
                     {
-                      p->lex_strterm = $<nd>2;
+                      pop_strterm(p,$<nd>2);
                       $$ = list2($1, $3);
                     }
                 | tLITERAL_DELIM
@@ -3424,14 +3435,13 @@ heredoc_string_interp : tHD_STRING_MID
                     }
                 | tHD_STRING_PART
                     {
-                      $<nd>$ = p->lex_strterm;
-                      p->lex_strterm = NULL;
+                      $<nd>$ = push_strterm(p);
                     }
                   compstmt
                   '}'
                     {
+                      pop_strterm(p, $<nd>2);
                       parser_heredoc_info *info = parsing_heredoc_info(p);
-                      p->lex_strterm = $<nd>2;
                       info->doc = push(push(info->doc, $1), $3);
                     }
                 ;
@@ -4810,10 +4820,10 @@ static int
 parse_string(parser_state *p)
 {
   int c;
-  string_type type = (string_type)(intptr_t)p->lex_strterm->car;
-  int nest_level = intn(p->lex_strterm->cdr->car);
-  int beg = intn(p->lex_strterm->cdr->cdr->car);
-  int end = intn(p->lex_strterm->cdr->cdr->cdr);
+  string_type type = (string_type)p->lex_strterm->type;
+  int nest_level = p->lex_strterm->level;
+  int beg = p->lex_strterm->paren;
+  int end = p->lex_strterm->term;
   parser_heredoc_info *hinfo = (type & STR_FUNC_HEREDOC) ? parsing_heredoc_info(p) : NULL;
 
   mrb_bool unindent = hinfo && hinfo->remove_indent;
@@ -4889,11 +4899,11 @@ parse_string(parser_state *p)
     }
     else if (c == beg) {
       nest_level++;
-      p->lex_strterm->cdr->car = nint(nest_level);
+      p->lex_strterm->level = nest_level;
     }
     else if (c == end) {
       nest_level--;
-      p->lex_strterm->cdr->car = nint(nest_level);
+      p->lex_strterm->level = nest_level;
     }
     else if (c == '\\') {
       c = nextc(p);
@@ -6668,8 +6678,6 @@ mrb_parser_new(mrb_state *mrb)
   p->tokbuf = p->buf;
 
   p->lex_strterm = NULL;
-  p->all_heredocs = p->parsing_heredoc = NULL;
-  p->lex_strterm_before_heredoc = NULL;
 
   p->current_filename_index = -1;
   p->filename_table = NULL;
diff --git a/mrbgems/mruby-compiler/core/y.tab.c b/mrbgems/mruby-compiler/core/y.tab.c
index c493d3192..15b2d4bfd 100644
--- a/mrbgems/mruby-compiler/core/y.tab.c
+++ b/mrbgems/mruby-compiler/core/y.tab.c
@@ -183,7 +183,7 @@ cons_gen(parser_state *p, node *car, node *cdr)
     p->cells = p->cells->cdr;
   }
   else {
-    c = (node *)parser_palloc(p, sizeof(mrb_ast_node));
+    c = (node*)parser_palloc(p, sizeof(mrb_ast_node));
   }
 
   c->car = car;
@@ -259,7 +259,7 @@ append_gen(parser_state *p, node *a, node *b)
 static char*
 parser_strndup(parser_state *p, const char *s, size_t len)
 {
-  char *b = (char *)parser_palloc(p, len+1);
+  char *b = (char*)parser_palloc(p, len+1);
 
   memcpy(b, s, len);
   b[len] = '\0';
@@ -1244,7 +1244,7 @@ new_nth_ref(parser_state *p, int n)
 static node*
 new_heredoc(parser_state *p)
 {
-  parser_heredoc_info *inf = (parser_heredoc_info *)parser_palloc(p, sizeof(parser_heredoc_info));
+  parser_heredoc_info *inf = (parser_heredoc_info*)parser_palloc(p, sizeof(parser_heredoc_info));
   return cons((node*)NODE_HEREDOC, (node*)inf);
 }
 
@@ -1408,19 +1408,50 @@ label_reference(parser_state *p, mrb_sym sym)
 
 typedef enum mrb_string_type  string_type;
 
-static node*
+typedef struct parser_lex_strterm {
+  int type;
+  int level;
+  int term;
+  int paren;
+  struct parser_lex_strterm *prev;
+} parser_lex_strterm;
+
+static parser_lex_strterm*
 new_strterm(parser_state *p, string_type type, int term, int paren)
 {
-  return cons(nint(type), cons(nint(0), cons(nint(paren), nint(term))));
+  parser_lex_strterm *lex = (parser_lex_strterm*)parser_palloc(p, sizeof(parser_lex_strterm));
+  lex->type = type;
+  lex->level = 0;
+  lex->term = term;
+  lex->paren = paren;
+  lex->prev = p->lex_strterm;
+  return lex;
 }
 
 static void
 end_strterm(parser_state *p)
 {
-  cons_free(p->lex_strterm->cdr->cdr);
-  cons_free(p->lex_strterm->cdr);
-  cons_free(p->lex_strterm);
+  parser_lex_strterm *term = p->lex_strterm->prev;
+  if (sizeof(node) < sizeof(parser_lex_strterm)) {
+    cons_free((node*)p->lex_strterm);
+  }
+  p->lex_strterm = term;
+}
+
+static node*
+push_strterm(parser_state *p)
+{
+  node *n = cons((node*)p->lex_strterm, p->parsing_heredoc);
   p->lex_strterm = NULL;
+  return n;
+}
+
+static void
+pop_strterm(parser_state *p, node *n)
+{
+  p->lex_strterm = (parser_lex_strterm*)n->car;
+  p->parsing_heredoc = n->cdr;
+  cons_free(n);
 }
 
 static parser_heredoc_info *
@@ -1436,28 +1467,11 @@ parsing_heredoc_info(parser_state *p)
 static void
 heredoc_treat_nextline(parser_state *p)
 {
-  if (p->heredocs_from_nextline == NULL)
-    return;
-  if (p->parsing_heredoc == NULL) {
-    p->all_heredocs = append(p->all_heredocs, p->heredocs_from_nextline);
-  }
-  else {
-    if (p->all_heredocs == p->parsing_heredoc) {
-      p->all_heredocs = append(p->heredocs_from_nextline, p->all_heredocs);
-    }
-    else {
-      node *n = p->all_heredocs;
-      mrb_assert(n != NULL);
-      append(p->heredocs_from_nextline, p->parsing_heredoc);
-      while (n->cdr != p->parsing_heredoc) {
-        n = n->cdr;
-        mrb_assert(n != NULL);
-      }
-      n->cdr = p->heredocs_from_nextline;
-    }
+  if (p->heredocs_from_nextline == NULL) return;
+  if (p->parsing_heredoc && p->lex_strterm) {
+    append(p->heredocs_from_nextline, p->parsing_heredoc);
   }
   p->parsing_heredoc = p->heredocs_from_nextline;
-  p->lex_strterm_before_heredoc = p->lex_strterm;
   p->lex_strterm = new_strterm(p, parsing_heredoc_info(p)->type, 0, 0);
   p->heredocs_from_nextline = NULL;
 }
@@ -1469,20 +1483,18 @@ heredoc_end(parser_state *p)
   if (p->parsing_heredoc == NULL) {
     p->lstate = EXPR_BEG;
     end_strterm(p);
-    p->lex_strterm = p->lex_strterm_before_heredoc;
-    p->lex_strterm_before_heredoc = NULL;
   }
   else {
     /* next heredoc */
-    p->lex_strterm->car = nint(parsing_heredoc_info(p)->type);
+    p->lex_strterm->type = parsing_heredoc_info(p)->type;
   }
 }
-#define is_strterm_type(p,str_func) (intn((p)->lex_strterm->car) & (str_func))
+#define is_strterm_type(p,str_func) ((p)->lex_strterm->type & (str_func))
 
 /* xxx ----------------------------- */
 
 
-#line 1486 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 1498 "mrbgems/mruby-compiler/core/y.tab.c"
 
 # ifndef YY_CAST
 #  ifdef __cplusplus
@@ -1654,7 +1666,7 @@ extern int yydebug;
 #if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
 union YYSTYPE
 {
-#line 1428 "mrbgems/mruby-compiler/core/parse.y"
+#line 1440 "mrbgems/mruby-compiler/core/parse.y"
 
     node *nd;
     mrb_sym id;
@@ -1662,7 +1674,7 @@ union YYSTYPE
     stack_type stack;
     const struct vtable *vars;
 
-#line 1666 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 1678 "mrbgems/mruby-compiler/core/y.tab.c"
 
 };
 typedef union YYSTYPE YYSTYPE;
@@ -2048,68 +2060,68 @@ static const yytype_uint8 yytranslate[] =
   /* YYRLINE[YYN] -- Source line where rule number YYN was defined.  */
 static const yytype_int16 yyrline[] =
 {
-       0,  1599,  1599,  1599,  1610,  1616,  1620,  1625,  1629,  1635,
-    1637,  1636,  1650,  1677,  1683,  1687,  1692,  1696,  1702,  1702,
-    1706,  1710,  1714,  1718,  1722,  1726,  1730,  1735,  1736,  1740,
-    1744,  1748,  1752,  1758,  1761,  1765,  1769,  1773,  1777,  1781,
-    1786,  1790,  1799,  1808,  1817,  1826,  1833,  1834,  1838,  1842,
-    1843,  1847,  1851,  1855,  1859,  1863,  1873,  1872,  1887,  1896,
-    1897,  1900,  1901,  1908,  1907,  1922,  1926,  1931,  1935,  1940,
-    1944,  1949,  1953,  1957,  1961,  1965,  1971,  1975,  1981,  1982,
-    1988,  1992,  1996,  2000,  2004,  2008,  2012,  2016,  2020,  2024,
-    2030,  2031,  2037,  2041,  2047,  2051,  2057,  2061,  2065,  2069,
-    2073,  2077,  2083,  2089,  2096,  2100,  2104,  2108,  2112,  2116,
-    2122,  2128,  2133,  2139,  2143,  2146,  2150,  2154,  2161,  2162,
-    2163,  2164,  2169,  2176,  2177,  2180,  2184,  2184,  2190,  2191,
-    2192,  2193,  2194,  2195,  2196,  2197,  2198,  2199,  2200,  2201,
-    2202,  2203,  2204,  2205,  2206,  2207,  2208,  2209,  2210,  2211,
-    2212,  2213,  2214,  2215,  2216,  2217,  2218,  2219,  2222,  2222,
-    2222,  2223,  2223,  2224,  2224,  2224,  2225,  2225,  2225,  2225,
-    2226,  2226,  2226,  2227,  2227,  2227,  2228,  2228,  2228,  2228,
-    2229,  2229,  2229,  2229,  2230,  2230,  2230,  2230,  2231,  2231,
-    2231,  2231,  2232,  2232,  2232,  2232,  2233,  2233,  2236,  2240,
-    2244,  2248,  2252,  2256,  2260,  2265,  2270,  2275,  2279,  2283,
-    2287,  2291,  2295,  2299,  2303,  2307,  2311,  2315,  2319,  2323,
-    2327,  2331,  2335,  2339,  2343,  2347,  2351,  2355,  2359,  2363,
-    2367,  2371,  2375,  2379,  2383,  2387,  2391,  2395,  2399,  2403,
-    2407,  2411,  2415,  2419,  2423,  2432,  2441,  2450,  2459,  2465,
-    2466,  2471,  2475,  2482,  2486,  2493,  2497,  2506,  2523,  2524,
-    2527,  2528,  2529,  2534,  2539,  2546,  2552,  2557,  2562,  2567,
-    2574,  2574,  2585,  2589,  2595,  2599,  2605,  2608,  2614,  2618,
-    2623,  2628,  2634,  2639,  2643,  2649,  2650,  2651,  2652,  2653,
-    2654,  2655,  2656,  2660,  2665,  2664,  2676,  2680,  2675,  2685,
-    2685,  2689,  2693,  2697,  2701,  2706,  2711,  2715,  2719,  2723,
-    2727,  2731,  2732,  2738,  2745,  2737,  2758,  2766,  2774,  2774,
-    2774,  2781,  2781,  2781,  2788,  2794,  2799,  2801,  2798,  2810,
-    2808,  2826,  2831,  2824,  2848,  2846,  2862,  2872,  2883,  2887,
-    2891,  2895,  2901,  2908,  2909,  2910,  2913,  2914,  2917,  2918,
-    2926,  2927,  2933,  2937,  2940,  2944,  2948,  2952,  2957,  2961,
-    2965,  2969,  2975,  2974,  2984,  2988,  2992,  2996,  3002,  3007,
-    3012,  3016,  3020,  3024,  3028,  3032,  3036,  3040,  3044,  3048,
-    3052,  3056,  3060,  3064,  3068,  3074,  3079,  3086,  3086,  3090,
-    3095,  3102,  3106,  3112,  3113,  3116,  3121,  3124,  3128,  3134,
-    3138,  3145,  3144,  3159,  3169,  3173,  3178,  3185,  3189,  3193,
-    3197,  3201,  3205,  3209,  3213,  3217,  3224,  3223,  3238,  3237,
-    3253,  3261,  3270,  3273,  3280,  3283,  3287,  3288,  3291,  3295,
-    3298,  3302,  3305,  3306,  3307,  3308,  3311,  3312,  3318,  3319,
-    3320,  3324,  3337,  3338,  3344,  3349,  3348,  3359,  3363,  3369,
-    3373,  3386,  3390,  3396,  3399,  3400,  3403,  3409,  3415,  3416,
-    3419,  3426,  3425,  3439,  3443,  3457,  3462,  3476,  3482,  3483,
-    3484,  3485,  3486,  3490,  3496,  3500,  3510,  3511,  3512,  3516,
-    3522,  3526,  3530,  3534,  3538,  3544,  3548,  3554,  3558,  3562,
-    3566,  3570,  3574,  3582,  3589,  3595,  3596,  3600,  3604,  3603,
-    3620,  3621,  3624,  3630,  3634,  3640,  3641,  3645,  3649,  3655,
-    3661,  3667,  3674,  3680,  3687,  3691,  3697,  3701,  3707,  3708,
-    3711,  3715,  3721,  3725,  3729,  3733,  3739,  3744,  3749,  3753,
-    3757,  3761,  3765,  3769,  3773,  3777,  3781,  3785,  3789,  3793,
-    3797,  3801,  3806,  3812,  3817,  3822,  3827,  3832,  3839,  3843,
-    3850,  3855,  3854,  3866,  3870,  3876,  3884,  3892,  3900,  3904,
-    3910,  3914,  3920,  3921,  3924,  3929,  3936,  3937,  3940,  3944,
-    3950,  3954,  3960,  3965,  3965,  3990,  3991,  3997,  4002,  4008,
-    4014,  4019,  4023,  4033,  4038,  4044,  4045,  4046,  4049,  4050,
-    4051,  4052,  4055,  4056,  4057,  4060,  4061,  4064,  4068,  4074,
-    4075,  4081,  4082,  4085,  4086,  4089,  4092,  4093,  4094,  4097,
-    4098,  4101,  4106,  4109,  4110,  4114
+       0,  1611,  1611,  1611,  1622,  1628,  1632,  1637,  1641,  1647,
+    1649,  1648,  1662,  1689,  1695,  1699,  1704,  1708,  1714,  1714,
+    1718,  1722,  1726,  1730,  1734,  1738,  1742,  1747,  1748,  1752,
+    1756,  1760,  1764,  1770,  1773,  1777,  1781,  1785,  1789,  1793,
+    1798,  1802,  1811,  1820,  1829,  1838,  1845,  1846,  1850,  1854,
+    1855,  1859,  1863,  1867,  1871,  1875,  1885,  1884,  1899,  1908,
+    1909,  1912,  1913,  1920,  1919,  1934,  1938,  1943,  1947,  1952,
+    1956,  1961,  1965,  1969,  1973,  1977,  1983,  1987,  1993,  1994,
+    2000,  2004,  2008,  2012,  2016,  2020,  2024,  2028,  2032,  2036,
+    2042,  2043,  2049,  2053,  2059,  2063,  2069,  2073,  2077,  2081,
+    2085,  2089,  2095,  2101,  2108,  2112,  2116,  2120,  2124,  2128,
+    2134,  2140,  2145,  2151,  2155,  2158,  2162,  2166,  2173,  2174,
+    2175,  2176,  2181,  2188,  2189,  2192,  2196,  2196,  2202,  2203,
+    2204,  2205,  2206,  2207,  2208,  2209,  2210,  2211,  2212,  2213,
+    2214,  2215,  2216,  2217,  2218,  2219,  2220,  2221,  2222,  2223,
+    2224,  2225,  2226,  2227,  2228,  2229,  2230,  2231,  2234,  2234,
+    2234,  2235,  2235,  2236,  2236,  2236,  2237,  2237,  2237,  2237,
+    2238,  2238,  2238,  2239,  2239,  2239,  2240,  2240,  2240,  2240,
+    2241,  2241,  2241,  2241,  2242,  2242,  2242,  2242,  2243,  2243,
+    2243,  2243,  2244,  2244,  2244,  2244,  2245,  2245,  2248,  2252,
+    2256,  2260,  2264,  2268,  2272,  2277,  2282,  2287,  2291,  2295,
+    2299,  2303,  2307,  2311,  2315,  2319,  2323,  2327,  2331,  2335,
+    2339,  2343,  2347,  2351,  2355,  2359,  2363,  2367,  2371,  2375,
+    2379,  2383,  2387,  2391,  2395,  2399,  2403,  2407,  2411,  2415,
+    2419,  2423,  2427,  2431,  2435,  2444,  2453,  2462,  2471,  2477,
+    2478,  2483,  2487,  2494,  2498,  2505,  2509,  2518,  2535,  2536,
+    2539,  2540,  2541,  2546,  2551,  2558,  2564,  2569,  2574,  2579,
+    2586,  2586,  2597,  2601,  2607,  2611,  2617,  2620,  2626,  2630,
+    2635,  2640,  2646,  2651,  2655,  2661,  2662,  2663,  2664,  2665,
+    2666,  2667,  2668,  2672,  2677,  2676,  2688,  2692,  2687,  2697,
+    2697,  2701,  2705,  2709,  2713,  2718,  2723,  2727,  2731,  2735,
+    2739,  2743,  2744,  2750,  2757,  2749,  2770,  2778,  2786,  2786,
+    2786,  2793,  2793,  2793,  2800,  2806,  2811,  2813,  2810,  2822,
+    2820,  2838,  2843,  2836,  2860,  2858,  2874,  2884,  2895,  2899,
+    2903,  2907,  2913,  2920,  2921,  2922,  2925,  2926,  2929,  2930,
+    2938,  2939,  2945,  2949,  2952,  2956,  2960,  2964,  2969,  2973,
+    2977,  2981,  2987,  2986,  2996,  3000,  3004,  3008,  3014,  3019,
+    3024,  3028,  3032,  3036,  3040,  3044,  3048,  3052,  3056,  3060,
+    3064,  3068,  3072,  3076,  3080,  3086,  3091,  3098,  3098,  3102,
+    3107,  3114,  3118,  3124,  3125,  3128,  3133,  3136,  3140,  3146,
+    3150,  3157,  3156,  3171,  3181,  3185,  3190,  3197,  3201,  3205,
+    3209,  3213,  3217,  3221,  3225,  3229,  3236,  3235,  3250,  3249,
+    3265,  3273,  3282,  3285,  3292,  3295,  3299,  3300,  3303,  3307,
+    3310,  3314,  3317,  3318,  3319,  3320,  3323,  3324,  3330,  3331,
+    3332,  3336,  3349,  3350,  3356,  3361,  3360,  3370,  3374,  3380,
+    3384,  3397,  3401,  3407,  3410,  3411,  3414,  3420,  3426,  3427,
+    3430,  3437,  3436,  3449,  3453,  3467,  3472,  3486,  3492,  3493,
+    3494,  3495,  3496,  3500,  3506,  3510,  3520,  3521,  3522,  3526,
+    3532,  3536,  3540,  3544,  3548,  3554,  3558,  3564,  3568,  3572,
+    3576,  3580,  3584,  3592,  3599,  3605,  3606,  3610,  3614,  3613,
+    3630,  3631,  3634,  3640,  3644,  3650,  3651,  3655,  3659,  3665,
+    3671,  3677,  3684,  3690,  3697,  3701,  3707,  3711,  3717,  3718,
+    3721,  3725,  3731,  3735,  3739,  3743,  3749,  3754,  3759,  3763,
+    3767,  3771,  3775,  3779,  3783,  3787,  3791,  3795,  3799,  3803,
+    3807,  3811,  3816,  3822,  3827,  3832,  3837,  3842,  3849,  3853,
+    3860,  3865,  3864,  3876,  3880,  3886,  3894,  3902,  3910,  3914,
+    3920,  3924,  3930,  3931,  3934,  3939,  3946,  3947,  3950,  3954,
+    3960,  3964,  3970,  3975,  3975,  4000,  4001,  4007,  4012,  4018,
+    4024,  4029,  4033,  4043,  4048,  4054,  4055,  4056,  4059,  4060,
+    4061,  4062,  4065,  4066,  4067,  4070,  4071,  4074,  4078,  4084,
+    4085,  4091,  4092,  4095,  4096,  4099,  4102,  4103,  4104,  4107,
+    4108,  4111,  4116,  4119,  4120,  4124
 };
 #endif
 
@@ -6126,86 +6138,86 @@ yyreduce:
   switch (yyn)
     {
   case 2:
-#line 1599 "mrbgems/mruby-compiler/core/parse.y"
+#line 1611 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->lstate = EXPR_BEG;
                       if (!p->locals) p->locals = cons(0,0);
                     }
-#line 6135 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6147 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 3:
-#line 1604 "mrbgems/mruby-compiler/core/parse.y"
+#line 1616 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->tree = new_scope(p, (yyvsp[0].nd));
                       NODE_LINENO(p->tree, (yyvsp[0].nd));
                     }
-#line 6144 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6156 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 4:
-#line 1611 "mrbgems/mruby-compiler/core/parse.y"
+#line 1623 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 6152 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6164 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 5:
-#line 1617 "mrbgems/mruby-compiler/core/parse.y"
+#line 1629 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_begin(p, 0);
                     }
-#line 6160 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6172 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 6:
-#line 1621 "mrbgems/mruby-compiler/core/parse.y"
+#line 1633 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_begin(p, (yyvsp[0].nd));
                       NODE_LINENO((yyval.nd), (yyvsp[0].nd));
                     }
-#line 6169 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6181 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 7:
-#line 1626 "mrbgems/mruby-compiler/core/parse.y"
+#line 1638 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-2].nd), newline_node((yyvsp[0].nd)));
                     }
-#line 6177 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6189 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 8:
-#line 1630 "mrbgems/mruby-compiler/core/parse.y"
+#line 1642 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_begin(p, 0);
                     }
-#line 6185 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6197 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 10:
-#line 1637 "mrbgems/mruby-compiler/core/parse.y"
+#line 1649 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = local_switch(p);
                       nvars_block(p);
                     }
-#line 6194 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6206 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 11:
-#line 1642 "mrbgems/mruby-compiler/core/parse.y"
+#line 1654 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(p, "BEGIN not supported");
                       local_resume(p, (yyvsp[-3].nd));
                       nvars_unnest(p);
                       (yyval.nd) = 0;
                     }
-#line 6205 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6217 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 12:
-#line 1654 "mrbgems/mruby-compiler/core/parse.y"
+#line 1666 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if ((yyvsp[-2].nd)) {
                         (yyval.nd) = new_rescue(p, (yyvsp[-3].nd), (yyvsp[-2].nd), (yyvsp[-1].nd));
@@ -6227,222 +6239,222 @@ yyreduce:
                         }
                       }
                     }
-#line 6231 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6243 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 13:
-#line 1678 "mrbgems/mruby-compiler/core/parse.y"
+#line 1690 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 6239 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6251 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 14:
-#line 1684 "mrbgems/mruby-compiler/core/parse.y"
+#line 1696 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_begin(p, 0);
                     }
-#line 6247 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6259 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 15:
-#line 1688 "mrbgems/mruby-compiler/core/parse.y"
+#line 1700 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_begin(p, (yyvsp[0].nd));
                       NODE_LINENO((yyval.nd), (yyvsp[0].nd));
                     }
-#line 6256 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6268 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 16:
-#line 1693 "mrbgems/mruby-compiler/core/parse.y"
+#line 1705 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-2].nd), newline_node((yyvsp[0].nd)));
                     }
-#line 6264 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6276 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 17:
-#line 1697 "mrbgems/mruby-compiler/core/parse.y"
+#line 1709 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_begin(p, (yyvsp[0].nd));
                     }
-#line 6272 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6284 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 18:
-#line 1702 "mrbgems/mruby-compiler/core/parse.y"
+#line 1714 "mrbgems/mruby-compiler/core/parse.y"
                                      {p->lstate = EXPR_FNAME;}
-#line 6278 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6290 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 19:
-#line 1703 "mrbgems/mruby-compiler/core/parse.y"
+#line 1715 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_alias(p, (yyvsp[-2].id), (yyvsp[0].id));
                     }
-#line 6286 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6298 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 20:
-#line 1707 "mrbgems/mruby-compiler/core/parse.y"
+#line 1719 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 6294 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6306 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 21:
-#line 1711 "mrbgems/mruby-compiler/core/parse.y"
+#line 1723 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_if(p, cond((yyvsp[0].nd)), (yyvsp[-2].nd), 0);
                     }
-#line 6302 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6314 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 22:
-#line 1715 "mrbgems/mruby-compiler/core/parse.y"
+#line 1727 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_unless(p, cond((yyvsp[0].nd)), (yyvsp[-2].nd), 0);
                     }
-#line 6310 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6322 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 23:
-#line 1719 "mrbgems/mruby-compiler/core/parse.y"
+#line 1731 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_while(p, cond((yyvsp[0].nd)), (yyvsp[-2].nd));
                     }
-#line 6318 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6330 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 24:
-#line 1723 "mrbgems/mruby-compiler/core/parse.y"
+#line 1735 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_until(p, cond((yyvsp[0].nd)), (yyvsp[-2].nd));
                     }
-#line 6326 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6338 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 25:
-#line 1727 "mrbgems/mruby-compiler/core/parse.y"
+#line 1739 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_mod_rescue(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 6334 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6346 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 26:
-#line 1731 "mrbgems/mruby-compiler/core/parse.y"
+#line 1743 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(p, "END not supported");
                       (yyval.nd) = new_postexe(p, (yyvsp[-1].nd));
                     }
-#line 6343 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6355 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 28:
-#line 1737 "mrbgems/mruby-compiler/core/parse.y"
+#line 1749 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_masgn(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 6351 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6363 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 29:
-#line 1741 "mrbgems/mruby-compiler/core/parse.y"
+#line 1753 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_asgn(p, (yyvsp[-2].nd), new_array(p, (yyvsp[0].nd)));
                     }
-#line 6359 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6371 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 30:
-#line 1745 "mrbgems/mruby-compiler/core/parse.y"
+#line 1757 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_masgn(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 6367 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6379 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 31:
-#line 1749 "mrbgems/mruby-compiler/core/parse.y"
+#line 1761 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_masgn(p, (yyvsp[-2].nd), new_array(p, (yyvsp[0].nd)));
                     }
-#line 6375 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6387 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 32:
-#line 1753 "mrbgems/mruby-compiler/core/parse.y"
+#line 1765 "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 6385 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6397 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 34:
-#line 1762 "mrbgems/mruby-compiler/core/parse.y"
+#line 1774 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_asgn(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 6393 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6405 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 35:
-#line 1766 "mrbgems/mruby-compiler/core/parse.y"
+#line 1778 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_op_asgn(p, (yyvsp[-2].nd), (yyvsp[-1].id), (yyvsp[0].nd));
                     }
-#line 6401 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6413 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 36:
-#line 1770 "mrbgems/mruby-compiler/core/parse.y"
+#line 1782 "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 6409 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6421 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 37:
-#line 1774 "mrbgems/mruby-compiler/core/parse.y"
+#line 1786 "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 6417 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6429 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 38:
-#line 1778 "mrbgems/mruby-compiler/core/parse.y"
+#line 1790 "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 6425 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6437 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 39:
-#line 1782 "mrbgems/mruby-compiler/core/parse.y"
+#line 1794 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(p, "constant re-assignment");
                       (yyval.nd) = 0;
                     }
-#line 6434 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6446 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 40:
-#line 1787 "mrbgems/mruby-compiler/core/parse.y"
+#line 1799 "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 6442 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6454 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 41:
-#line 1791 "mrbgems/mruby-compiler/core/parse.y"
+#line 1803 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-3].nd);
                       endless_method_name(p, (yyvsp[-3].nd));
@@ -6451,11 +6463,11 @@ yyreduce:
                       nvars_unnest(p);
                       p->in_def--;
                     }
-#line 6455 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6467 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 42:
-#line 1800 "mrbgems/mruby-compiler/core/parse.y"
+#line 1812 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-5].nd);
                       endless_method_name(p, (yyvsp[-5].nd));
@@ -6464,11 +6476,11 @@ yyreduce:
                       nvars_unnest(p);
                       p->in_def--;
                     }
-#line 6468 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6480 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 43:
-#line 1809 "mrbgems/mruby-compiler/core/parse.y"
+#line 1821 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-3].nd);
                       void_expr_error(p, (yyvsp[0].nd));
@@ -6477,11 +6489,11 @@ yyreduce:
                       p->in_def--;
                       p->in_single--;
                     }
-#line 6481 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6493 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 44:
-#line 1818 "mrbgems/mruby-compiler/core/parse.y"
+#line 1830 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-5].nd);
                       void_expr_error(p, (yyvsp[-2].nd));
@@ -6490,79 +6502,79 @@ yyreduce:
                       p->in_def--;
                       p->in_single--;
                     }
-#line 6494 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6506 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 45:
-#line 1827 "mrbgems/mruby-compiler/core/parse.y"
+#line 1839 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       backref_error(p, (yyvsp[-2].nd));
                       (yyval.nd) = new_begin(p, 0);
                     }
-#line 6503 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6515 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 47:
-#line 1835 "mrbgems/mruby-compiler/core/parse.y"
+#line 1847 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_mod_rescue(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 6511 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6523 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 50:
-#line 1844 "mrbgems/mruby-compiler/core/parse.y"
+#line 1856 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_and(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 6519 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6531 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 51:
-#line 1848 "mrbgems/mruby-compiler/core/parse.y"
+#line 1860 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_or(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 6527 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6539 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 52:
-#line 1852 "mrbgems/mruby-compiler/core/parse.y"
+#line 1864 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_uni_op(p, cond((yyvsp[0].nd)), "!");
                     }
-#line 6535 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6547 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 53:
-#line 1856 "mrbgems/mruby-compiler/core/parse.y"
+#line 1868 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_uni_op(p, cond((yyvsp[0].nd)), "!");
                     }
-#line 6543 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6555 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 55:
-#line 1864 "mrbgems/mruby-compiler/core/parse.y"
+#line 1876 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_def(p, (yyvsp[0].id), nint(p->cmdarg_stack), local_switch(p));
                       p->cmdarg_stack = 0;
                       p->in_def++;
                       nvars_block(p);
                     }
-#line 6554 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6566 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 56:
-#line 1873 "mrbgems/mruby-compiler/core/parse.y"
+#line 1885 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->lstate = EXPR_FNAME;
                     }
-#line 6562 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6574 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 57:
-#line 1877 "mrbgems/mruby-compiler/core/parse.y"
+#line 1889 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_sdef(p, (yyvsp[-3].nd), (yyvsp[0].id), nint(p->cmdarg_stack), local_switch(p));
                       p->cmdarg_stack = 0;
@@ -6571,1054 +6583,1054 @@ yyreduce:
                       nvars_block(p);
                       p->lstate = EXPR_ENDFN; /* force for args */
                     }
-#line 6575 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6587 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 58:
-#line 1888 "mrbgems/mruby-compiler/core/parse.y"
+#line 1900 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if (!(yyvsp[0].nd)) (yyval.nd) = new_nil(p);
                       else {
                         (yyval.nd) = (yyvsp[0].nd);
                       }
                     }
-#line 6586 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6598 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 62:
-#line 1902 "mrbgems/mruby-compiler/core/parse.y"
+#line 1914 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), (yyvsp[-1].id), (yyvsp[0].nd), (yyvsp[-2].num));
                     }
-#line 6594 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6606 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 63:
-#line 1908 "mrbgems/mruby-compiler/core/parse.y"
+#line 1920 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_nest(p);
                       nvars_nest(p);
                     }
-#line 6603 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6615 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 64:
-#line 1915 "mrbgems/mruby-compiler/core/parse.y"
+#line 1927 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_block(p, (yyvsp[-2].nd), (yyvsp[-1].nd));
                       local_unnest(p);
                       nvars_unnest(p);
                     }
-#line 6613 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6625 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 65:
-#line 1923 "mrbgems/mruby-compiler/core/parse.y"
+#line 1935 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_fcall(p, (yyvsp[-1].id), (yyvsp[0].nd));
                     }
-#line 6621 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6633 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 66:
-#line 1927 "mrbgems/mruby-compiler/core/parse.y"
+#line 1939 "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 6630 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6642 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 67:
-#line 1932 "mrbgems/mruby-compiler/core/parse.y"
+#line 1944 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), (yyvsp[-1].id), (yyvsp[0].nd), (yyvsp[-2].num));
                     }
-#line 6638 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6650 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 68:
-#line 1936 "mrbgems/mruby-compiler/core/parse.y"
+#line 1948 "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 6647 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6659 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 69:
-#line 1941 "mrbgems/mruby-compiler/core/parse.y"
+#line 1953 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), (yyvsp[-1].id), (yyvsp[0].nd), tCOLON2);
                     }
-#line 6655 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6667 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 70:
-#line 1945 "mrbgems/mruby-compiler/core/parse.y"
+#line 1957 "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 6664 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6676 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 71:
-#line 1950 "mrbgems/mruby-compiler/core/parse.y"
+#line 1962 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_super(p, (yyvsp[0].nd));
                     }
-#line 6672 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6684 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 72:
-#line 1954 "mrbgems/mruby-compiler/core/parse.y"
+#line 1966 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_yield(p, (yyvsp[0].nd));
                     }
-#line 6680 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6692 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 73:
-#line 1958 "mrbgems/mruby-compiler/core/parse.y"
+#line 1970 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_return(p, ret_args(p, (yyvsp[0].nd)));
                     }
-#line 6688 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6700 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 74:
-#line 1962 "mrbgems/mruby-compiler/core/parse.y"
+#line 1974 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_break(p, ret_args(p, (yyvsp[0].nd)));
                     }
-#line 6696 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6708 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 75:
-#line 1966 "mrbgems/mruby-compiler/core/parse.y"
+#line 1978 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_next(p, ret_args(p, (yyvsp[0].nd)));
                     }
-#line 6704 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6716 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 76:
-#line 1972 "mrbgems/mruby-compiler/core/parse.y"
+#line 1984 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 6712 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6724 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 77:
-#line 1976 "mrbgems/mruby-compiler/core/parse.y"
+#line 1988 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 6720 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6732 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 79:
-#line 1983 "mrbgems/mruby-compiler/core/parse.y"
+#line 1995 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 6728 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6740 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 80:
-#line 1989 "mrbgems/mruby-compiler/core/parse.y"
+#line 2001 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 6736 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6748 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 81:
-#line 1993 "mrbgems/mruby-compiler/core/parse.y"
+#line 2005 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1(push((yyvsp[-1].nd),(yyvsp[0].nd)));
                     }
-#line 6744 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6756 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 82:
-#line 1997 "mrbgems/mruby-compiler/core/parse.y"
+#line 2009 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list2((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 6752 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6764 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 83:
-#line 2001 "mrbgems/mruby-compiler/core/parse.y"
+#line 2013 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3((yyvsp[-4].nd), (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 6760 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6772 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 84:
-#line 2005 "mrbgems/mruby-compiler/core/parse.y"
+#line 2017 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list2((yyvsp[-1].nd), new_nil(p));
                     }
-#line 6768 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6780 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 85:
-#line 2009 "mrbgems/mruby-compiler/core/parse.y"
+#line 2021 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3((yyvsp[-3].nd), new_nil(p), (yyvsp[0].nd));
                     }
-#line 6776 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6788 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 86:
-#line 2013 "mrbgems/mruby-compiler/core/parse.y"
+#line 2025 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list2(0, (yyvsp[0].nd));
                     }
-#line 6784 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6796 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 87:
-#line 2017 "mrbgems/mruby-compiler/core/parse.y"
+#line 2029 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3(0, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 6792 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6804 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 88:
-#line 2021 "mrbgems/mruby-compiler/core/parse.y"
+#line 2033 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list2(0, new_nil(p));
                     }
-#line 6800 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6812 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 89:
-#line 2025 "mrbgems/mruby-compiler/core/parse.y"
+#line 2037 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3(0, new_nil(p), (yyvsp[0].nd));
                     }
-#line 6808 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6820 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 91:
-#line 2032 "mrbgems/mruby-compiler/core/parse.y"
+#line 2044 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_masgn(p, (yyvsp[-1].nd), NULL);
                     }
-#line 6816 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6828 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 92:
-#line 2038 "mrbgems/mruby-compiler/core/parse.y"
+#line 2050 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1((yyvsp[-1].nd));
                     }
-#line 6824 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6836 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 93:
-#line 2042 "mrbgems/mruby-compiler/core/parse.y"
+#line 2054 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[-1].nd));
                     }
-#line 6832 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6844 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 94:
-#line 2048 "mrbgems/mruby-compiler/core/parse.y"
+#line 2060 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 6840 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6852 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 95:
-#line 2052 "mrbgems/mruby-compiler/core/parse.y"
+#line 2064 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 6848 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6860 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 96:
-#line 2058 "mrbgems/mruby-compiler/core/parse.y"
+#line 2070 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       assignable(p, (yyvsp[0].nd));
                     }
-#line 6856 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6868 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 97:
-#line 2062 "mrbgems/mruby-compiler/core/parse.y"
+#line 2074 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), intern_op(aref), (yyvsp[-1].nd), '.');
                     }
-#line 6864 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6876 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 98:
-#line 2066 "mrbgems/mruby-compiler/core/parse.y"
+#line 2078 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-2].nd), (yyvsp[0].id), 0, (yyvsp[-1].num));
                     }
-#line 6872 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6884 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 99:
-#line 2070 "mrbgems/mruby-compiler/core/parse.y"
+#line 2082 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-2].nd), (yyvsp[0].id), 0, tCOLON2);
                     }
-#line 6880 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6892 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 100:
-#line 2074 "mrbgems/mruby-compiler/core/parse.y"
+#line 2086 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-2].nd), (yyvsp[0].id), 0, (yyvsp[-1].num));
                     }
-#line 6888 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6900 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 101:
-#line 2078 "mrbgems/mruby-compiler/core/parse.y"
+#line 2090 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if (p->in_def || p->in_single)
                         yyerror(p, "dynamic constant assignment");
                       (yyval.nd) = new_colon2(p, (yyvsp[-2].nd), (yyvsp[0].id));
                     }
-#line 6898 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6910 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 102:
-#line 2084 "mrbgems/mruby-compiler/core/parse.y"
+#line 2096 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if (p->in_def || p->in_single)
                         yyerror(p, "dynamic constant assignment");
                       (yyval.nd) = new_colon3(p, (yyvsp[0].id));
                     }
-#line 6908 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6920 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 103:
-#line 2090 "mrbgems/mruby-compiler/core/parse.y"
+#line 2102 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       backref_error(p, (yyvsp[0].nd));
                       (yyval.nd) = 0;
                     }
-#line 6917 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6929 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 104:
-#line 2097 "mrbgems/mruby-compiler/core/parse.y"
+#line 2109 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       assignable(p, (yyvsp[0].nd));
                     }
-#line 6925 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6937 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 105:
-#line 2101 "mrbgems/mruby-compiler/core/parse.y"
+#line 2113 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), intern_op(aref), (yyvsp[-1].nd), '.');
                     }
-#line 6933 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6945 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 106:
-#line 2105 "mrbgems/mruby-compiler/core/parse.y"
+#line 2117 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-2].nd), (yyvsp[0].id), 0, (yyvsp[-1].num));
                     }
-#line 6941 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6953 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 107:
-#line 2109 "mrbgems/mruby-compiler/core/parse.y"
+#line 2121 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-2].nd), (yyvsp[0].id), 0, tCOLON2);
                     }
-#line 6949 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6961 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 108:
-#line 2113 "mrbgems/mruby-compiler/core/parse.y"
+#line 2125 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-2].nd), (yyvsp[0].id), 0, (yyvsp[-1].num));
                     }
-#line 6957 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6969 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 109:
-#line 2117 "mrbgems/mruby-compiler/core/parse.y"
+#line 2129 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if (p->in_def || p->in_single)
                         yyerror(p, "dynamic constant assignment");
                       (yyval.nd) = new_colon2(p, (yyvsp[-2].nd), (yyvsp[0].id));
                     }
-#line 6967 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6979 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 110:
-#line 2123 "mrbgems/mruby-compiler/core/parse.y"
+#line 2135 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if (p->in_def || p->in_single)
                         yyerror(p, "dynamic constant assignment");
                       (yyval.nd) = new_colon3(p, (yyvsp[0].id));
                     }
-#line 6977 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6989 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 111:
-#line 2129 "mrbgems/mruby-compiler/core/parse.y"
+#line 2141 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       backref_error(p, (yyvsp[0].nd));
                       (yyval.nd) = 0;
                     }
-#line 6986 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6998 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 112:
-#line 2134 "mrbgems/mruby-compiler/core/parse.y"
+#line 2146 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(p, "can't assign to numbered parameter");
                     }
-#line 6994 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7006 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 113:
-#line 2140 "mrbgems/mruby-compiler/core/parse.y"
+#line 2152 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(p, "class/module name must be CONSTANT");
                     }
-#line 7002 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7014 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 115:
-#line 2147 "mrbgems/mruby-compiler/core/parse.y"
+#line 2159 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = cons(nint(1), nsym((yyvsp[0].id)));
                     }
-#line 7010 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7022 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 116:
-#line 2151 "mrbgems/mruby-compiler/core/parse.y"
+#line 2163 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = cons(nint(0), nsym((yyvsp[0].id)));
                     }
-#line 7018 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7030 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 117:
-#line 2155 "mrbgems/mruby-compiler/core/parse.y"
+#line 2167 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       void_expr_error(p, (yyvsp[-2].nd));
                       (yyval.nd) = cons((yyvsp[-2].nd), nsym((yyvsp[0].id)));
                     }
-#line 7027 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7039 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 121:
-#line 2165 "mrbgems/mruby-compiler/core/parse.y"
+#line 2177 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->lstate = EXPR_ENDFN;
                       (yyval.id) = (yyvsp[0].id);
                     }
-#line 7036 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7048 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 122:
-#line 2170 "mrbgems/mruby-compiler/core/parse.y"
+#line 2182 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->lstate = EXPR_ENDFN;
                       (yyval.id) = (yyvsp[0].id);
                     }
-#line 7045 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7057 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 125:
-#line 2181 "mrbgems/mruby-compiler/core/parse.y"
+#line 2193 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_undef(p, (yyvsp[0].id));
                     }
-#line 7053 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7065 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 126:
-#line 2184 "mrbgems/mruby-compiler/core/parse.y"
+#line 2196 "mrbgems/mruby-compiler/core/parse.y"
                                  {p->lstate = EXPR_FNAME;}
-#line 7059 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7071 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 127:
-#line 2185 "mrbgems/mruby-compiler/core/parse.y"
+#line 2197 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-3].nd), nsym((yyvsp[0].id)));
                     }
-#line 7067 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 128:
-#line 2190 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(or);     }
-#line 7073 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 129:
-#line 2191 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(xor);    }
 #line 7079 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 130:
-#line 2192 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(and);    }
+  case 128:
+#line 2202 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(or);     }
 #line 7085 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 131:
-#line 2193 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(cmp);    }
+  case 129:
+#line 2203 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(xor);    }
 #line 7091 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 132:
-#line 2194 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(eq);     }
+  case 130:
+#line 2204 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(and);    }
 #line 7097 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 133:
-#line 2195 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(eqq);    }
+  case 131:
+#line 2205 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(cmp);    }
 #line 7103 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 134:
-#line 2196 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(match);  }
+  case 132:
+#line 2206 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(eq);     }
 #line 7109 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 135:
-#line 2197 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(nmatch); }
+  case 133:
+#line 2207 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(eqq);    }
 #line 7115 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 136:
-#line 2198 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(gt);     }
+  case 134:
+#line 2208 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(match);  }
 #line 7121 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 137:
-#line 2199 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(ge);     }
+  case 135:
+#line 2209 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(nmatch); }
 #line 7127 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 138:
-#line 2200 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(lt);     }
+  case 136:
+#line 2210 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(gt);     }
 #line 7133 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 139:
-#line 2201 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(le);     }
+  case 137:
+#line 2211 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(ge);     }
 #line 7139 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 140:
-#line 2202 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(neq);    }
+  case 138:
+#line 2212 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(lt);     }
 #line 7145 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 141:
-#line 2203 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(lshift); }
+  case 139:
+#line 2213 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(le);     }
 #line 7151 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 142:
-#line 2204 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(rshift); }
+  case 140:
+#line 2214 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(neq);    }
 #line 7157 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 143:
-#line 2205 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(add);    }
+  case 141:
+#line 2215 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(lshift); }
 #line 7163 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 144:
-#line 2206 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(sub);    }
+  case 142:
+#line 2216 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(rshift); }
 #line 7169 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 145:
-#line 2207 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(mul);    }
+  case 143:
+#line 2217 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(add);    }
 #line 7175 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 146:
-#line 2208 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(mul);    }
+  case 144:
+#line 2218 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(sub);    }
 #line 7181 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 147:
-#line 2209 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(div);    }
+  case 145:
+#line 2219 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(mul);    }
 #line 7187 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 148:
-#line 2210 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(mod);    }
+  case 146:
+#line 2220 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(mul);    }
 #line 7193 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 149:
-#line 2211 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(pow);    }
+  case 147:
+#line 2221 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(div);    }
 #line 7199 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 150:
-#line 2212 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(pow);    }
+  case 148:
+#line 2222 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(mod);    }
 #line 7205 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 151:
-#line 2213 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(not);    }
+  case 149:
+#line 2223 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(pow);    }
 #line 7211 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 152:
-#line 2214 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(neg);    }
+  case 150:
+#line 2224 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(pow);    }
 #line 7217 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 153:
-#line 2215 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(plus);   }
+  case 151:
+#line 2225 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(not);    }
 #line 7223 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 154:
-#line 2216 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(minus);  }
+  case 152:
+#line 2226 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(neg);    }
 #line 7229 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 155:
-#line 2217 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(aref);   }
+  case 153:
+#line 2227 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(plus);   }
 #line 7235 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 156:
-#line 2218 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(aset);   }
+  case 154:
+#line 2228 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(minus);  }
 #line 7241 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 157:
-#line 2219 "mrbgems/mruby-compiler/core/parse.y"
-                                { (yyval.id) = intern_op(tick);   }
+  case 155:
+#line 2229 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(aref);   }
 #line 7247 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
+  case 156:
+#line 2230 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(aset);   }
+#line 7253 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 157:
+#line 2231 "mrbgems/mruby-compiler/core/parse.y"
+                                { (yyval.id) = intern_op(tick);   }
+#line 7259 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
   case 198:
-#line 2237 "mrbgems/mruby-compiler/core/parse.y"
+#line 2249 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_asgn(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 7255 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7267 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 199:
-#line 2241 "mrbgems/mruby-compiler/core/parse.y"
+#line 2253 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_op_asgn(p, (yyvsp[-2].nd), (yyvsp[-1].id), (yyvsp[0].nd));
                     }
-#line 7263 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7275 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 200:
-#line 2245 "mrbgems/mruby-compiler/core/parse.y"
+#line 2257 "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 7271 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7283 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 201:
-#line 2249 "mrbgems/mruby-compiler/core/parse.y"
+#line 2261 "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 7279 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7291 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 202:
-#line 2253 "mrbgems/mruby-compiler/core/parse.y"
+#line 2265 "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 7287 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7299 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 203:
-#line 2257 "mrbgems/mruby-compiler/core/parse.y"
+#line 2269 "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 7295 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7307 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 204:
-#line 2261 "mrbgems/mruby-compiler/core/parse.y"
+#line 2273 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(p, "constant re-assignment");
                       (yyval.nd) = new_begin(p, 0);
                     }
-#line 7304 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7316 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 205:
-#line 2266 "mrbgems/mruby-compiler/core/parse.y"
+#line 2278 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(p, "constant re-assignment");
                       (yyval.nd) = new_begin(p, 0);
                     }
-#line 7313 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7325 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 206:
-#line 2271 "mrbgems/mruby-compiler/core/parse.y"
+#line 2283 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       backref_error(p, (yyvsp[-2].nd));
                       (yyval.nd) = new_begin(p, 0);
                     }
-#line 7322 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7334 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 207:
-#line 2276 "mrbgems/mruby-compiler/core/parse.y"
+#line 2288 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_dot2(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 7330 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7342 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 208:
-#line 2280 "mrbgems/mruby-compiler/core/parse.y"
+#line 2292 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_dot2(p, (yyvsp[-1].nd), new_nil(p));
                     }
-#line 7338 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7350 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 209:
-#line 2284 "mrbgems/mruby-compiler/core/parse.y"
+#line 2296 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_dot2(p, new_nil(p), (yyvsp[0].nd));
                     }
-#line 7346 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7358 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 210:
-#line 2288 "mrbgems/mruby-compiler/core/parse.y"
+#line 2300 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_dot3(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 7354 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7366 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 211:
-#line 2292 "mrbgems/mruby-compiler/core/parse.y"
+#line 2304 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_dot3(p, (yyvsp[-1].nd), new_nil(p));
                     }
-#line 7362 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7374 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 212:
-#line 2296 "mrbgems/mruby-compiler/core/parse.y"
+#line 2308 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_dot3(p, new_nil(p), (yyvsp[0].nd));
                     }
-#line 7370 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7382 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 213:
-#line 2300 "mrbgems/mruby-compiler/core/parse.y"
+#line 2312 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "+", (yyvsp[0].nd));
                     }
-#line 7378 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7390 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 214:
-#line 2304 "mrbgems/mruby-compiler/core/parse.y"
+#line 2316 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "-", (yyvsp[0].nd));
                     }
-#line 7386 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7398 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 215:
-#line 2308 "mrbgems/mruby-compiler/core/parse.y"
+#line 2320 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "*", (yyvsp[0].nd));
                     }
-#line 7394 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7406 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 216:
-#line 2312 "mrbgems/mruby-compiler/core/parse.y"
+#line 2324 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "/", (yyvsp[0].nd));
                     }
-#line 7402 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7414 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 217:
-#line 2316 "mrbgems/mruby-compiler/core/parse.y"
+#line 2328 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "%", (yyvsp[0].nd));
                     }
-#line 7410 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7422 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 218:
-#line 2320 "mrbgems/mruby-compiler/core/parse.y"
+#line 2332 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "**", (yyvsp[0].nd));
                     }
-#line 7418 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7430 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 219:
-#line 2324 "mrbgems/mruby-compiler/core/parse.y"
+#line 2336 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_negate(p, call_bin_op(p, (yyvsp[-2].nd), "**", (yyvsp[0].nd)));
                     }
-#line 7426 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7438 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 220:
-#line 2328 "mrbgems/mruby-compiler/core/parse.y"
+#line 2340 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_negate(p, call_bin_op(p, (yyvsp[-2].nd), "**", (yyvsp[0].nd)));
                     }
-#line 7434 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7446 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 221:
-#line 2332 "mrbgems/mruby-compiler/core/parse.y"
+#line 2344 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_uni_op(p, (yyvsp[0].nd), "+@");
                     }
-#line 7442 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7454 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 222:
-#line 2336 "mrbgems/mruby-compiler/core/parse.y"
+#line 2348 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_negate(p, (yyvsp[0].nd));
                     }
-#line 7450 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7462 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 223:
-#line 2340 "mrbgems/mruby-compiler/core/parse.y"
+#line 2352 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "|", (yyvsp[0].nd));
                     }
-#line 7458 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7470 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 224:
-#line 2344 "mrbgems/mruby-compiler/core/parse.y"
+#line 2356 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "^", (yyvsp[0].nd));
                     }
-#line 7466 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7478 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 225:
-#line 2348 "mrbgems/mruby-compiler/core/parse.y"
+#line 2360 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "&", (yyvsp[0].nd));
                     }
-#line 7474 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7486 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 226:
-#line 2352 "mrbgems/mruby-compiler/core/parse.y"
+#line 2364 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "<=>", (yyvsp[0].nd));
                     }
-#line 7482 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7494 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 227:
-#line 2356 "mrbgems/mruby-compiler/core/parse.y"
+#line 2368 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), ">", (yyvsp[0].nd));
                     }
-#line 7490 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7502 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 228:
-#line 2360 "mrbgems/mruby-compiler/core/parse.y"
+#line 2372 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), ">=", (yyvsp[0].nd));
                     }
-#line 7498 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7510 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 229:
-#line 2364 "mrbgems/mruby-compiler/core/parse.y"
+#line 2376 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "<", (yyvsp[0].nd));
                     }
-#line 7506 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7518 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 230:
-#line 2368 "mrbgems/mruby-compiler/core/parse.y"
+#line 2380 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "<=", (yyvsp[0].nd));
                     }
-#line 7514 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7526 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 231:
-#line 2372 "mrbgems/mruby-compiler/core/parse.y"
+#line 2384 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "==", (yyvsp[0].nd));
                     }
-#line 7522 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7534 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 232:
-#line 2376 "mrbgems/mruby-compiler/core/parse.y"
+#line 2388 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "===", (yyvsp[0].nd));
                     }
-#line 7530 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7542 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 233:
-#line 2380 "mrbgems/mruby-compiler/core/parse.y"
+#line 2392 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "!=", (yyvsp[0].nd));
                     }
-#line 7538 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7550 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 234:
-#line 2384 "mrbgems/mruby-compiler/core/parse.y"
+#line 2396 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "=~", (yyvsp[0].nd));
                     }
-#line 7546 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7558 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 235:
-#line 2388 "mrbgems/mruby-compiler/core/parse.y"
+#line 2400 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "!~", (yyvsp[0].nd));
                     }
-#line 7554 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7566 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 236:
-#line 2392 "mrbgems/mruby-compiler/core/parse.y"
+#line 2404 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_uni_op(p, cond((yyvsp[0].nd)), "!");
                     }
-#line 7562 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7574 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 237:
-#line 2396 "mrbgems/mruby-compiler/core/parse.y"
+#line 2408 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_uni_op(p, cond((yyvsp[0].nd)), "~");
                     }
-#line 7570 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7582 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 238:
-#line 2400 "mrbgems/mruby-compiler/core/parse.y"
+#line 2412 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "<<", (yyvsp[0].nd));
                     }
-#line 7578 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7590 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 239:
-#line 2404 "mrbgems/mruby-compiler/core/parse.y"
+#line 2416 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), ">>", (yyvsp[0].nd));
                     }
-#line 7586 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7598 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 240:
-#line 2408 "mrbgems/mruby-compiler/core/parse.y"
+#line 2420 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_and(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 7594 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7606 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 241:
-#line 2412 "mrbgems/mruby-compiler/core/parse.y"
+#line 2424 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_or(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 7602 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7614 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 242:
-#line 2416 "mrbgems/mruby-compiler/core/parse.y"
+#line 2428 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_if(p, cond((yyvsp[-5].nd)), (yyvsp[-3].nd), (yyvsp[0].nd));
                     }
-#line 7610 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7622 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 243:
-#line 2420 "mrbgems/mruby-compiler/core/parse.y"
+#line 2432 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_if(p, cond((yyvsp[-5].nd)), (yyvsp[-3].nd), (yyvsp[0].nd));
                     }
-#line 7618 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7630 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 244:
-#line 2424 "mrbgems/mruby-compiler/core/parse.y"
+#line 2436 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-3].nd);
                       endless_method_name(p, (yyvsp[-3].nd));
@@ -7627,11 +7639,11 @@ yyreduce:
                       nvars_unnest(p);
                       p->in_def--;
                     }
-#line 7631 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7643 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 245:
-#line 2433 "mrbgems/mruby-compiler/core/parse.y"
+#line 2445 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-5].nd);
                       endless_method_name(p, (yyvsp[-5].nd));
@@ -7640,11 +7652,11 @@ yyreduce:
                       nvars_unnest(p);
                       p->in_def--;
                     }
-#line 7644 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7656 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 246:
-#line 2442 "mrbgems/mruby-compiler/core/parse.y"
+#line 2454 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-3].nd);
                       void_expr_error(p, (yyvsp[0].nd));
@@ -7653,11 +7665,11 @@ yyreduce:
                       p->in_def--;
                       p->in_single--;
                     }
-#line 7657 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7669 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 247:
-#line 2451 "mrbgems/mruby-compiler/core/parse.y"
+#line 2463 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-5].nd);
                       void_expr_error(p, (yyvsp[-2].nd));
@@ -7666,70 +7678,70 @@ yyreduce:
                       p->in_def--;
                       p->in_single--;
                     }
-#line 7670 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7682 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 248:
-#line 2460 "mrbgems/mruby-compiler/core/parse.y"
+#line 2472 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 7678 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7690 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 250:
-#line 2467 "mrbgems/mruby-compiler/core/parse.y"
+#line 2479 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                       NODE_LINENO((yyval.nd), (yyvsp[-1].nd));
                     }
-#line 7687 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7699 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 251:
-#line 2472 "mrbgems/mruby-compiler/core/parse.y"
+#line 2484 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-3].nd), new_hash(p, (yyvsp[-1].nd)));
                     }
-#line 7695 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7707 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 252:
-#line 2476 "mrbgems/mruby-compiler/core/parse.y"
+#line 2488 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = cons(new_kw_hash(p, (yyvsp[-1].nd)), 0);
                       NODE_LINENO((yyval.nd), (yyvsp[-1].nd));
                     }
-#line 7704 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7716 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 253:
-#line 2483 "mrbgems/mruby-compiler/core/parse.y"
+#line 2495 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 7712 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7724 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 254:
-#line 2487 "mrbgems/mruby-compiler/core/parse.y"
+#line 2499 "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 7721 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7733 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 255:
-#line 2494 "mrbgems/mruby-compiler/core/parse.y"
+#line 2506 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 7729 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7741 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 256:
-#line 2498 "mrbgems/mruby-compiler/core/parse.y"
+#line 2510 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       mrb_sym r = intern_op(mul);
                       mrb_sym k = intern_op(pow);
@@ -7738,11 +7750,11 @@ 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 7742 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7754 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 257:
-#line 2507 "mrbgems/mruby-compiler/core/parse.y"
+#line 2519 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       mrb_sym r = intern_op(mul);
                       mrb_sym k = intern_op(pow);
@@ -7757,386 +7769,386 @@ yyreduce:
                         (yyval.nd) = 0;
                       }
                     }
-#line 7761 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7773 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 262:
-#line 2530 "mrbgems/mruby-compiler/core/parse.y"
+#line 2542 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_callargs(p,(yyvsp[-1].nd),0,0);
                       NODE_LINENO((yyval.nd), (yyvsp[-1].nd));
                     }
-#line 7770 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7782 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 263:
-#line 2535 "mrbgems/mruby-compiler/core/parse.y"
+#line 2547 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_callargs(p,(yyvsp[-3].nd),new_kw_hash(p,(yyvsp[-1].nd)),0);
                       NODE_LINENO((yyval.nd), (yyvsp[-3].nd));
                     }
-#line 7779 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7791 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 264:
-#line 2540 "mrbgems/mruby-compiler/core/parse.y"
+#line 2552 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_callargs(p,0,new_kw_hash(p,(yyvsp[-1].nd)),0);
                       NODE_LINENO((yyval.nd), (yyvsp[-1].nd));
                     }
-#line 7788 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7800 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 265:
-#line 2547 "mrbgems/mruby-compiler/core/parse.y"
+#line 2559 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       void_expr_error(p, (yyvsp[0].nd));
                       (yyval.nd) = new_callargs(p, list1((yyvsp[0].nd)), 0, 0);
                       NODE_LINENO((yyval.nd), (yyvsp[0].nd));
                     }
-#line 7798 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7810 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 266:
-#line 2553 "mrbgems/mruby-compiler/core/parse.y"
+#line 2565 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_callargs(p, (yyvsp[-1].nd), 0, (yyvsp[0].nd));
                       NODE_LINENO((yyval.nd), (yyvsp[-1].nd));
                     }
-#line 7807 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7819 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 267:
-#line 2558 "mrbgems/mruby-compiler/core/parse.y"
+#line 2570 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_callargs(p, 0, new_kw_hash(p, (yyvsp[-1].nd)), (yyvsp[0].nd));
                       NODE_LINENO((yyval.nd), (yyvsp[-1].nd));
                     }
-#line 7816 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7828 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 268:
-#line 2563 "mrbgems/mruby-compiler/core/parse.y"
+#line 2575 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_callargs(p, (yyvsp[-3].nd), new_kw_hash(p, (yyvsp[-1].nd)), (yyvsp[0].nd));
                       NODE_LINENO((yyval.nd), (yyvsp[-3].nd));
                     }
-#line 7825 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7837 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 269:
-#line 2568 "mrbgems/mruby-compiler/core/parse.y"
+#line 2580 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_callargs(p, 0, 0, (yyvsp[0].nd));
                       NODE_LINENO((yyval.nd), (yyvsp[0].nd));
                     }
-#line 7834 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7846 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 270:
-#line 2574 "mrbgems/mruby-compiler/core/parse.y"
+#line 2586 "mrbgems/mruby-compiler/core/parse.y"
                    {
                       (yyval.stack) = p->cmdarg_stack;
                       CMDARG_PUSH(1);
                     }
-#line 7843 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7855 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 271:
-#line 2579 "mrbgems/mruby-compiler/core/parse.y"
+#line 2591 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->cmdarg_stack = (yyvsp[-1].stack);
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 7852 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7864 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 272:
-#line 2586 "mrbgems/mruby-compiler/core/parse.y"
+#line 2598 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_block_arg(p, (yyvsp[0].nd));
                     }
-#line 7860 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7872 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 273:
-#line 2590 "mrbgems/mruby-compiler/core/parse.y"
+#line 2602 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_block_arg(p, 0);
                     }
-#line 7868 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7880 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 274:
-#line 2596 "mrbgems/mruby-compiler/core/parse.y"
+#line 2608 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 7876 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7888 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 275:
-#line 2600 "mrbgems/mruby-compiler/core/parse.y"
+#line 2612 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = 0;
                     }
-#line 7884 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7896 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 277:
-#line 2609 "mrbgems/mruby-compiler/core/parse.y"
+#line 2621 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       void_expr_error(p, (yyvsp[0].nd));
                       (yyval.nd) = list1((yyvsp[0].nd));
                       NODE_LINENO((yyval.nd), (yyvsp[0].nd));
                     }
-#line 7894 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7906 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 278:
-#line 2615 "mrbgems/mruby-compiler/core/parse.y"
+#line 2627 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1(new_splat(p, new_lvar(p, intern_op(mul))));
                     }
-#line 7902 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7914 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 279:
-#line 2619 "mrbgems/mruby-compiler/core/parse.y"
+#line 2631 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1(new_splat(p, (yyvsp[0].nd)));
                       NODE_LINENO((yyval.nd), (yyvsp[0].nd));
                     }
-#line 7911 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7923 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 280:
-#line 2624 "mrbgems/mruby-compiler/core/parse.y"
+#line 2636 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       void_expr_error(p, (yyvsp[0].nd));
                       (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 7920 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7932 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 281:
-#line 2629 "mrbgems/mruby-compiler/core/parse.y"
+#line 2641 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-3].nd), new_splat(p, (yyvsp[0].nd)));
                     }
-#line 7928 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7940 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 282:
-#line 2635 "mrbgems/mruby-compiler/core/parse.y"
+#line 2647 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       void_expr_error(p, (yyvsp[0].nd));
                       (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 7937 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7949 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 283:
-#line 2640 "mrbgems/mruby-compiler/core/parse.y"
+#line 2652 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-3].nd), new_splat(p, (yyvsp[0].nd)));
                     }
-#line 7945 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7957 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 284:
-#line 2644 "mrbgems/mruby-compiler/core/parse.y"
+#line 2656 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1(new_splat(p, (yyvsp[0].nd)));
                     }
-#line 7953 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7965 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 292:
-#line 2657 "mrbgems/mruby-compiler/core/parse.y"
+#line 2669 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_nvar(p, (yyvsp[0].num));
                     }
-#line 7961 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7973 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 293:
-#line 2661 "mrbgems/mruby-compiler/core/parse.y"
+#line 2673 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_fcall(p, (yyvsp[0].id), 0);
                     }
-#line 7969 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7981 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 294:
-#line 2665 "mrbgems/mruby-compiler/core/parse.y"
+#line 2677 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.stack) = p->cmdarg_stack;
                       p->cmdarg_stack = 0;
                     }
-#line 7978 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7990 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 295:
-#line 2671 "mrbgems/mruby-compiler/core/parse.y"
+#line 2683 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->cmdarg_stack = (yyvsp[-2].stack);
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 7987 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7999 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 296:
-#line 2676 "mrbgems/mruby-compiler/core/parse.y"
+#line 2688 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.stack) = p->cmdarg_stack;
                       p->cmdarg_stack = 0;
                     }
-#line 7996 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8008 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 297:
-#line 2680 "mrbgems/mruby-compiler/core/parse.y"
+#line 2692 "mrbgems/mruby-compiler/core/parse.y"
                        {p->lstate = EXPR_ENDARG;}
-#line 8002 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8014 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 298:
-#line 2681 "mrbgems/mruby-compiler/core/parse.y"
+#line 2693 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->cmdarg_stack = (yyvsp[-3].stack);
                       (yyval.nd) = (yyvsp[-2].nd);
                     }
-#line 8011 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8023 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 299:
-#line 2685 "mrbgems/mruby-compiler/core/parse.y"
+#line 2697 "mrbgems/mruby-compiler/core/parse.y"
                               {p->lstate = EXPR_ENDARG;}
-#line 8017 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8029 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 300:
-#line 2686 "mrbgems/mruby-compiler/core/parse.y"
+#line 2698 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_nil(p);
                     }
-#line 8025 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8037 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 301:
-#line 2690 "mrbgems/mruby-compiler/core/parse.y"
+#line 2702 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 8033 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8045 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 302:
-#line 2694 "mrbgems/mruby-compiler/core/parse.y"
+#line 2706 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_colon2(p, (yyvsp[-2].nd), (yyvsp[0].id));
                     }
-#line 8041 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8053 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 303:
-#line 2698 "mrbgems/mruby-compiler/core/parse.y"
+#line 2710 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_colon3(p, (yyvsp[0].id));
                     }
-#line 8049 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8061 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 304:
-#line 2702 "mrbgems/mruby-compiler/core/parse.y"
+#line 2714 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_array(p, (yyvsp[-1].nd));
                       NODE_LINENO((yyval.nd), (yyvsp[-1].nd));
                     }
-#line 8058 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8070 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 305:
-#line 2707 "mrbgems/mruby-compiler/core/parse.y"
+#line 2719 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_hash(p, (yyvsp[-1].nd));
                       NODE_LINENO((yyval.nd), (yyvsp[-1].nd));
                     }
-#line 8067 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8079 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 306:
-#line 2712 "mrbgems/mruby-compiler/core/parse.y"
+#line 2724 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_return(p, 0);
                     }
-#line 8075 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8087 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 307:
-#line 2716 "mrbgems/mruby-compiler/core/parse.y"
+#line 2728 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_yield(p, (yyvsp[0].nd));
                     }
-#line 8083 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8095 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 308:
-#line 2720 "mrbgems/mruby-compiler/core/parse.y"
+#line 2732 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_uni_op(p, cond((yyvsp[-1].nd)), "!");
                     }
-#line 8091 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8103 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 309:
-#line 2724 "mrbgems/mruby-compiler/core/parse.y"
+#line 2736 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_uni_op(p, new_nil(p), "!");
                     }
-#line 8099 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8111 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 310:
-#line 2728 "mrbgems/mruby-compiler/core/parse.y"
+#line 2740 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_fcall(p, (yyvsp[-1].id), new_callargs(p, 0, 0, (yyvsp[0].nd)));
                     }
-#line 8107 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8119 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 312:
-#line 2733 "mrbgems/mruby-compiler/core/parse.y"
+#line 2745 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       call_with_block(p, (yyvsp[-1].nd), (yyvsp[0].nd));
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 8116 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8128 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 313:
-#line 2738 "mrbgems/mruby-compiler/core/parse.y"
+#line 2750 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_nest(p);
                       nvars_nest(p);
                       (yyval.num) = p->lpar_beg;
                       p->lpar_beg = ++p->paren_nest;
                     }
-#line 8127 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8139 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 314:
-#line 2745 "mrbgems/mruby-compiler/core/parse.y"
+#line 2757 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.stack) = p->cmdarg_stack;
                       p->cmdarg_stack = 0;
                     }
-#line 8136 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8148 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 315:
-#line 2750 "mrbgems/mruby-compiler/core/parse.y"
+#line 2762 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->lpar_beg = (yyvsp[-3].num);
                       (yyval.nd) = new_lambda(p, (yyvsp[-2].nd), (yyvsp[0].nd));
@@ -8145,149 +8157,149 @@ yyreduce:
                       p->cmdarg_stack = (yyvsp[-1].stack);
                       CMDARG_LEXPOP();
                     }
-#line 8149 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8161 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 316:
-#line 2762 "mrbgems/mruby-compiler/core/parse.y"
+#line 2774 "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 8158 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8170 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 317:
-#line 2770 "mrbgems/mruby-compiler/core/parse.y"
+#line 2782 "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 8167 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 318:
-#line 2774 "mrbgems/mruby-compiler/core/parse.y"
-                                {COND_PUSH(1);}
-#line 8173 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 319:
-#line 2774 "mrbgems/mruby-compiler/core/parse.y"
-                                                              {COND_POP();}
 #line 8179 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
+  case 318:
+#line 2786 "mrbgems/mruby-compiler/core/parse.y"
+                                {COND_PUSH(1);}
+#line 8185 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 319:
+#line 2786 "mrbgems/mruby-compiler/core/parse.y"
+                                                              {COND_POP();}
+#line 8191 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
   case 320:
-#line 2777 "mrbgems/mruby-compiler/core/parse.y"
+#line 2789 "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 8188 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 321:
-#line 2781 "mrbgems/mruby-compiler/core/parse.y"
-                                {COND_PUSH(1);}
-#line 8194 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 322:
-#line 2781 "mrbgems/mruby-compiler/core/parse.y"
-                                                              {COND_POP();}
 #line 8200 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
+  case 321:
+#line 2793 "mrbgems/mruby-compiler/core/parse.y"
+                                {COND_PUSH(1);}
+#line 8206 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 322:
+#line 2793 "mrbgems/mruby-compiler/core/parse.y"
+                                                              {COND_POP();}
+#line 8212 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
   case 323:
-#line 2784 "mrbgems/mruby-compiler/core/parse.y"
+#line 2796 "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 8209 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8221 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 324:
-#line 2791 "mrbgems/mruby-compiler/core/parse.y"
+#line 2803 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_case(p, (yyvsp[-3].nd), (yyvsp[-1].nd));
                     }
-#line 8217 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8229 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 325:
-#line 2795 "mrbgems/mruby-compiler/core/parse.y"
+#line 2807 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_case(p, 0, (yyvsp[-1].nd));
                     }
-#line 8225 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 326:
-#line 2799 "mrbgems/mruby-compiler/core/parse.y"
-                  {COND_PUSH(1);}
-#line 8231 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 327:
-#line 2801 "mrbgems/mruby-compiler/core/parse.y"
-                  {COND_POP();}
 #line 8237 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
+  case 326:
+#line 2811 "mrbgems/mruby-compiler/core/parse.y"
+                  {COND_PUSH(1);}
+#line 8243 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 327:
+#line 2813 "mrbgems/mruby-compiler/core/parse.y"
+                  {COND_POP();}
+#line 8249 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
   case 328:
-#line 2804 "mrbgems/mruby-compiler/core/parse.y"
+#line 2816 "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 8246 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8258 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 329:
-#line 2810 "mrbgems/mruby-compiler/core/parse.y"
+#line 2822 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if (p->in_def || p->in_single)
                         yyerror(p, "class definition in method body");
                       (yyval.nd) = local_switch(p);
                       nvars_block(p);
                     }
-#line 8257 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8269 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 330:
-#line 2818 "mrbgems/mruby-compiler/core/parse.y"
+#line 2830 "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 8268 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8280 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 331:
-#line 2826 "mrbgems/mruby-compiler/core/parse.y"
+#line 2838 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.num) = p->in_def;
                       p->in_def = 0;
                     }
-#line 8277 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8289 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 332:
-#line 2831 "mrbgems/mruby-compiler/core/parse.y"
+#line 2843 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = cons(local_switch(p), nint(p->in_single));
                       nvars_block(p);
                       p->in_single = 0;
                     }
-#line 8287 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8299 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 333:
-#line 2838 "mrbgems/mruby-compiler/core/parse.y"
+#line 2850 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_sclass(p, (yyvsp[-5].nd), (yyvsp[-1].nd));
                       SET_LINENO((yyval.nd), (yyvsp[-7].num));
@@ -8296,44 +8308,44 @@ yyreduce:
                       p->in_def = (yyvsp[-4].num);
                       p->in_single = intn((yyvsp[-2].nd)->cdr);
                     }
-#line 8300 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8312 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 334:
-#line 2848 "mrbgems/mruby-compiler/core/parse.y"
+#line 2860 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if (p->in_def || p->in_single)
                         yyerror(p, "module definition in method body");
                       (yyval.nd) = local_switch(p);
                       nvars_block(p);
                     }
-#line 8311 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8323 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 335:
-#line 2856 "mrbgems/mruby-compiler/core/parse.y"
+#line 2868 "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 8322 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8334 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 336:
-#line 2866 "mrbgems/mruby-compiler/core/parse.y"
+#line 2878 "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 8333 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8345 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 337:
-#line 2876 "mrbgems/mruby-compiler/core/parse.y"
+#line 2888 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-3].nd);
                       defs_setup(p, (yyval.nd), (yyvsp[-2].nd), (yyvsp[-1].nd));
@@ -8341,451 +8353,451 @@ yyreduce:
                       p->in_def--;
                       p->in_single--;
                     }
-#line 8345 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8357 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 338:
-#line 2884 "mrbgems/mruby-compiler/core/parse.y"
+#line 2896 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_break(p, 0);
                     }
-#line 8353 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8365 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 339:
-#line 2888 "mrbgems/mruby-compiler/core/parse.y"
+#line 2900 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_next(p, 0);
                     }
-#line 8361 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8373 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 340:
-#line 2892 "mrbgems/mruby-compiler/core/parse.y"
+#line 2904 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_redo(p);
                     }
-#line 8369 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8381 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 341:
-#line 2896 "mrbgems/mruby-compiler/core/parse.y"
+#line 2908 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_retry(p);
                     }
-#line 8377 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8389 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 342:
-#line 2902 "mrbgems/mruby-compiler/core/parse.y"
+#line 2914 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                       if (!(yyval.nd)) (yyval.nd) = new_nil(p);
                     }
-#line 8386 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8398 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 349:
-#line 2921 "mrbgems/mruby-compiler/core/parse.y"
+#line 2933 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_if(p, cond((yyvsp[-3].nd)), (yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 8394 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8406 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 351:
-#line 2928 "mrbgems/mruby-compiler/core/parse.y"
+#line 2940 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 8402 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8414 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 352:
-#line 2934 "mrbgems/mruby-compiler/core/parse.y"
+#line 2946 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1(list1((yyvsp[0].nd)));
                     }
-#line 8410 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8422 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 354:
-#line 2941 "mrbgems/mruby-compiler/core/parse.y"
+#line 2953 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3((yyvsp[0].nd),0,0);
                     }
-#line 8418 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8430 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 355:
-#line 2945 "mrbgems/mruby-compiler/core/parse.y"
+#line 2957 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3((yyvsp[-3].nd), new_arg(p, (yyvsp[0].id)), 0);
                     }
-#line 8426 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8438 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 356:
-#line 2949 "mrbgems/mruby-compiler/core/parse.y"
+#line 2961 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3((yyvsp[-5].nd), new_arg(p, (yyvsp[-2].id)), (yyvsp[0].nd));
                     }
-#line 8434 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8446 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 357:
-#line 2953 "mrbgems/mruby-compiler/core/parse.y"
+#line 2965 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_f(p, intern_op(mul));
                       (yyval.nd) = list3((yyvsp[-2].nd), nint(-1), 0);
                     }
-#line 8443 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8455 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 358:
-#line 2958 "mrbgems/mruby-compiler/core/parse.y"
+#line 2970 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3((yyvsp[-4].nd), nint(-1), (yyvsp[0].nd));
                     }
-#line 8451 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8463 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 359:
-#line 2962 "mrbgems/mruby-compiler/core/parse.y"
+#line 2974 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3(0, new_arg(p, (yyvsp[0].id)), 0);
                     }
-#line 8459 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8471 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 360:
-#line 2966 "mrbgems/mruby-compiler/core/parse.y"
+#line 2978 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3(0, new_arg(p, (yyvsp[-2].id)), (yyvsp[0].nd));
                     }
-#line 8467 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8479 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 361:
-#line 2970 "mrbgems/mruby-compiler/core/parse.y"
+#line 2982 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_f(p, intern_op(mul));
                       (yyval.nd) = list3(0, nint(-1), 0);
                     }
-#line 8476 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8488 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 362:
-#line 2975 "mrbgems/mruby-compiler/core/parse.y"
+#line 2987 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_f(p, intern_op(mul));
                     }
-#line 8484 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8496 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 363:
-#line 2979 "mrbgems/mruby-compiler/core/parse.y"
+#line 2991 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3(0, nint(-1), (yyvsp[0].nd));
                     }
-#line 8492 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8504 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 364:
-#line 2985 "mrbgems/mruby-compiler/core/parse.y"
+#line 2997 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, (yyvsp[-3].nd), (yyvsp[-1].nd), (yyvsp[0].id));
                     }
-#line 8500 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8512 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 365:
-#line 2989 "mrbgems/mruby-compiler/core/parse.y"
+#line 3001 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, (yyvsp[-1].nd), 0, (yyvsp[0].id));
                     }
-#line 8508 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8520 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 366:
-#line 2993 "mrbgems/mruby-compiler/core/parse.y"
+#line 3005 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, 0, (yyvsp[-1].nd), (yyvsp[0].id));
                     }
-#line 8516 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8528 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 367:
-#line 2997 "mrbgems/mruby-compiler/core/parse.y"
+#line 3009 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, 0, 0, (yyvsp[0].id));
                     }
-#line 8524 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8536 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 368:
-#line 3003 "mrbgems/mruby-compiler/core/parse.y"
+#line 3015 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 8532 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8544 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 369:
-#line 3007 "mrbgems/mruby-compiler/core/parse.y"
+#line 3019 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, 0, 0, 0);
                     }
-#line 8540 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8552 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 370:
-#line 3013 "mrbgems/mruby-compiler/core/parse.y"
+#line 3025 "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 8548 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8560 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 371:
-#line 3017 "mrbgems/mruby-compiler/core/parse.y"
+#line 3029 "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 8556 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8568 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 372:
-#line 3021 "mrbgems/mruby-compiler/core/parse.y"
+#line 3033 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, (yyvsp[-3].nd), (yyvsp[-1].nd), 0, 0, (yyvsp[0].nd));
                     }
-#line 8564 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8576 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 373:
-#line 3025 "mrbgems/mruby-compiler/core/parse.y"
+#line 3037 "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 8572 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8584 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 374:
-#line 3029 "mrbgems/mruby-compiler/core/parse.y"
+#line 3041 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, (yyvsp[-3].nd), 0, (yyvsp[-1].id), 0, (yyvsp[0].nd));
                     }
-#line 8580 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8592 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 375:
-#line 3033 "mrbgems/mruby-compiler/core/parse.y"
+#line 3045 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, (yyvsp[-2].nd), 0, 0, 0, (yyvsp[0].nd));
                     }
-#line 8588 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8600 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 376:
-#line 3037 "mrbgems/mruby-compiler/core/parse.y"
+#line 3049 "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 8596 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8608 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 377:
-#line 3041 "mrbgems/mruby-compiler/core/parse.y"
+#line 3053 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, (yyvsp[-1].nd), 0, 0, 0, (yyvsp[0].nd));
                     }
-#line 8604 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8616 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 378:
-#line 3045 "mrbgems/mruby-compiler/core/parse.y"
+#line 3057 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, (yyvsp[-3].nd), (yyvsp[-1].id), 0, (yyvsp[0].nd));
                     }
-#line 8612 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8624 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 379:
-#line 3049 "mrbgems/mruby-compiler/core/parse.y"
+#line 3061 "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 8620 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8632 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 380:
-#line 3053 "mrbgems/mruby-compiler/core/parse.y"
+#line 3065 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, (yyvsp[-1].nd), 0, 0, (yyvsp[0].nd));
                     }
-#line 8628 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8640 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 381:
-#line 3057 "mrbgems/mruby-compiler/core/parse.y"
+#line 3069 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, (yyvsp[-3].nd), 0, (yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 8636 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8648 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 382:
-#line 3061 "mrbgems/mruby-compiler/core/parse.y"
+#line 3073 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, 0, (yyvsp[-1].id), 0, (yyvsp[0].nd));
                     }
-#line 8644 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8656 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 383:
-#line 3065 "mrbgems/mruby-compiler/core/parse.y"
+#line 3077 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, 0, (yyvsp[-3].id), (yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 8652 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8664 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 384:
-#line 3069 "mrbgems/mruby-compiler/core/parse.y"
+#line 3081 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, 0, 0, 0, (yyvsp[0].nd));
                     }
-#line 8660 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8672 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 385:
-#line 3075 "mrbgems/mruby-compiler/core/parse.y"
+#line 3087 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_blk(p, 0);
                       (yyval.nd) = 0;
                     }
-#line 8669 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8681 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 386:
-#line 3080 "mrbgems/mruby-compiler/core/parse.y"
+#line 3092 "mrbgems/mruby-compiler/core/parse.y"
                    {
                       p->cmd_start = TRUE;
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 8678 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8690 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 387:
-#line 3086 "mrbgems/mruby-compiler/core/parse.y"
+#line 3098 "mrbgems/mruby-compiler/core/parse.y"
                       {local_add_blk(p, 0);}
-#line 8684 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8696 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 388:
-#line 3087 "mrbgems/mruby-compiler/core/parse.y"
+#line 3099 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = 0;
                     }
-#line 8692 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8704 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 389:
-#line 3091 "mrbgems/mruby-compiler/core/parse.y"
+#line 3103 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_blk(p, 0);
                       (yyval.nd) = 0;
                     }
-#line 8701 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8713 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 390:
-#line 3096 "mrbgems/mruby-compiler/core/parse.y"
+#line 3108 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-2].nd);
                     }
-#line 8709 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8721 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 391:
-#line 3103 "mrbgems/mruby-compiler/core/parse.y"
+#line 3115 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = 0;
                     }
-#line 8717 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8729 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 392:
-#line 3107 "mrbgems/mruby-compiler/core/parse.y"
+#line 3119 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = 0;
                     }
-#line 8725 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8737 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 395:
-#line 3117 "mrbgems/mruby-compiler/core/parse.y"
+#line 3129 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_f(p, (yyvsp[0].id));
                       new_bv(p, (yyvsp[0].id));
                     }
-#line 8734 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8746 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 397:
-#line 3125 "mrbgems/mruby-compiler/core/parse.y"
+#line 3137 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-2].nd);
                     }
-#line 8742 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8754 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 398:
-#line 3129 "mrbgems/mruby-compiler/core/parse.y"
+#line 3141 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 8750 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8762 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 399:
-#line 3135 "mrbgems/mruby-compiler/core/parse.y"
+#line 3147 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 8758 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8770 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 400:
-#line 3139 "mrbgems/mruby-compiler/core/parse.y"
+#line 3151 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 8766 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8778 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 401:
-#line 3145 "mrbgems/mruby-compiler/core/parse.y"
+#line 3157 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_nest(p);
                       nvars_nest(p);
                     }
-#line 8775 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8787 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 402:
-#line 3152 "mrbgems/mruby-compiler/core/parse.y"
+#line 3164 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_block(p,(yyvsp[-2].nd),(yyvsp[-1].nd));
                       local_unnest(p);
                       nvars_unnest(p);
                     }
-#line 8785 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8797 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 403:
-#line 3160 "mrbgems/mruby-compiler/core/parse.y"
+#line 3172 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if (typen((yyvsp[-1].nd)->car) == NODE_YIELD) {
                         yyerror(p, "block given to yield");
@@ -8795,159 +8807,159 @@ yyreduce:
                       }
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 8799 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8811 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 404:
-#line 3170 "mrbgems/mruby-compiler/core/parse.y"
+#line 3182 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), (yyvsp[-1].id), (yyvsp[0].nd), (yyvsp[-2].num));
                     }
-#line 8807 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8819 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 405:
-#line 3174 "mrbgems/mruby-compiler/core/parse.y"
+#line 3186 "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 8816 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8828 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 406:
-#line 3179 "mrbgems/mruby-compiler/core/parse.y"
+#line 3191 "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 8825 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8837 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 407:
-#line 3186 "mrbgems/mruby-compiler/core/parse.y"
+#line 3198 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_fcall(p, (yyvsp[-1].id), (yyvsp[0].nd));
                     }
-#line 8833 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8845 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 408:
-#line 3190 "mrbgems/mruby-compiler/core/parse.y"
+#line 3202 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), (yyvsp[-1].id), (yyvsp[0].nd), (yyvsp[-2].num));
                     }
-#line 8841 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8853 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 409:
-#line 3194 "mrbgems/mruby-compiler/core/parse.y"
+#line 3206 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), (yyvsp[-1].id), (yyvsp[0].nd), tCOLON2);
                     }
-#line 8849 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8861 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 410:
-#line 3198 "mrbgems/mruby-compiler/core/parse.y"
+#line 3210 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-2].nd), (yyvsp[0].id), 0, tCOLON2);
                     }
-#line 8857 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8869 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 411:
-#line 3202 "mrbgems/mruby-compiler/core/parse.y"
+#line 3214 "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 8865 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8877 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 412:
-#line 3206 "mrbgems/mruby-compiler/core/parse.y"
+#line 3218 "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 8873 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8885 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 413:
-#line 3210 "mrbgems/mruby-compiler/core/parse.y"
+#line 3222 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_super(p, (yyvsp[0].nd));
                     }
-#line 8881 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8893 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 414:
-#line 3214 "mrbgems/mruby-compiler/core/parse.y"
+#line 3226 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_zsuper(p);
                     }
-#line 8889 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8901 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 415:
-#line 3218 "mrbgems/mruby-compiler/core/parse.y"
+#line 3230 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), intern_op(aref), (yyvsp[-1].nd), '.');
                     }
-#line 8897 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8909 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 416:
-#line 3224 "mrbgems/mruby-compiler/core/parse.y"
+#line 3236 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_nest(p);
                       nvars_nest(p);
                       (yyval.num) = p->lineno;
                     }
-#line 8907 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8919 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 417:
-#line 3231 "mrbgems/mruby-compiler/core/parse.y"
+#line 3243 "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 8918 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8930 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 418:
-#line 3238 "mrbgems/mruby-compiler/core/parse.y"
+#line 3250 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_nest(p);
                       nvars_nest(p);
                       (yyval.num) = p->lineno;
                     }
-#line 8928 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8940 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 419:
-#line 3245 "mrbgems/mruby-compiler/core/parse.y"
+#line 3257 "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 8939 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8951 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 420:
-#line 3256 "mrbgems/mruby-compiler/core/parse.y"
+#line 3268 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = cons(cons((yyvsp[-3].nd), (yyvsp[-1].nd)), (yyvsp[0].nd));
                     }
-#line 8947 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8959 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 421:
-#line 3262 "mrbgems/mruby-compiler/core/parse.y"
+#line 3274 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if ((yyvsp[0].nd)) {
                         (yyval.nd) = cons(cons(0, (yyvsp[0].nd)), 0);
@@ -8956,60 +8968,60 @@ yyreduce:
                         (yyval.nd) = 0;
                       }
                     }
-#line 8960 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8972 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 423:
-#line 3276 "mrbgems/mruby-compiler/core/parse.y"
+#line 3288 "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 8969 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8981 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 425:
-#line 3284 "mrbgems/mruby-compiler/core/parse.y"
+#line 3296 "mrbgems/mruby-compiler/core/parse.y"
                     {
                         (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 8977 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8989 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 428:
-#line 3292 "mrbgems/mruby-compiler/core/parse.y"
+#line 3304 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 8985 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8997 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 430:
-#line 3299 "mrbgems/mruby-compiler/core/parse.y"
+#line 3311 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 8993 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9005 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 437:
-#line 3313 "mrbgems/mruby-compiler/core/parse.y"
+#line 3325 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = concat_string(p, (yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 9001 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9013 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 440:
-#line 3321 "mrbgems/mruby-compiler/core/parse.y"
+#line 3333 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 9009 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9021 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 441:
-#line 3325 "mrbgems/mruby-compiler/core/parse.y"
+#line 3337 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       node *n = (yyvsp[-1].nd);
                       if (intn((yyvsp[0].nd)->cdr->cdr) > 0) {
@@ -9020,69 +9032,68 @@ yyreduce:
                       }
                       (yyval.nd) = new_dstr(p, n);
                     }
-#line 9024 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9036 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 443:
-#line 3339 "mrbgems/mruby-compiler/core/parse.y"
+#line 3351 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = append((yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 9032 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9044 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 444:
-#line 3345 "mrbgems/mruby-compiler/core/parse.y"
+#line 3357 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 9040 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9052 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 445:
-#line 3349 "mrbgems/mruby-compiler/core/parse.y"
+#line 3361 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = p->lex_strterm;
-                      p->lex_strterm = NULL;
+                      (yyval.nd) = push_strterm(p);
                     }
-#line 9049 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9060 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 446:
-#line 3355 "mrbgems/mruby-compiler/core/parse.y"
+#line 3366 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      p->lex_strterm = (yyvsp[-2].nd);
+                      pop_strterm(p,(yyvsp[-2].nd));
                       (yyval.nd) = list2((yyvsp[-3].nd), (yyvsp[-1].nd));
                     }
-#line 9058 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9069 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 447:
-#line 3360 "mrbgems/mruby-compiler/core/parse.y"
+#line 3371 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1(new_literal_delim(p));
                     }
-#line 9066 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9077 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 448:
-#line 3364 "mrbgems/mruby-compiler/core/parse.y"
+#line 3375 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1(new_literal_delim(p));
                     }
-#line 9074 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9085 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 449:
-#line 3370 "mrbgems/mruby-compiler/core/parse.y"
+#line 3381 "mrbgems/mruby-compiler/core/parse.y"
                     {
                         (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 9082 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9093 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 450:
-#line 3374 "mrbgems/mruby-compiler/core/parse.y"
+#line 3385 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       node *n = (yyvsp[-1].nd);
                       if (intn((yyvsp[0].nd)->cdr->cdr) > 0) {
@@ -9093,82 +9104,81 @@ yyreduce:
                       }
                       (yyval.nd) = new_dxstr(p, n);
                     }
-#line 9097 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9108 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 451:
-#line 3387 "mrbgems/mruby-compiler/core/parse.y"
+#line 3398 "mrbgems/mruby-compiler/core/parse.y"
                     {
                         (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 9105 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9116 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 452:
-#line 3391 "mrbgems/mruby-compiler/core/parse.y"
+#line 3402 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_dregx(p, (yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 9113 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9124 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 456:
-#line 3404 "mrbgems/mruby-compiler/core/parse.y"
+#line 3415 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       parser_heredoc_info *info = parsing_heredoc_info(p);
                       info->doc = push(info->doc, new_str(p, "", 0));
                       heredoc_end(p);
                     }
-#line 9123 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9134 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 457:
-#line 3410 "mrbgems/mruby-compiler/core/parse.y"
+#line 3421 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       heredoc_end(p);
                     }
-#line 9131 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9142 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 460:
-#line 3420 "mrbgems/mruby-compiler/core/parse.y"
+#line 3431 "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 9141 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9152 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 461:
-#line 3426 "mrbgems/mruby-compiler/core/parse.y"
+#line 3437 "mrbgems/mruby-compiler/core/parse.y"
                     {
-                      (yyval.nd) = p->lex_strterm;
-                      p->lex_strterm = NULL;
-                    }
-#line 9150 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 462:
-#line 3432 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      parser_heredoc_info *info = parsing_heredoc_info(p);
-                      p->lex_strterm = (yyvsp[-2].nd);
-                      info->doc = push(push(info->doc, (yyvsp[-3].nd)), (yyvsp[-1].nd));
+                      (yyval.nd) = push_strterm(p);
                     }
 #line 9160 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
+  case 462:
+#line 3442 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      pop_strterm(p, (yyvsp[-2].nd));
+                      parser_heredoc_info *info = parsing_heredoc_info(p);
+                      info->doc = push(push(info->doc, (yyvsp[-3].nd)), (yyvsp[-1].nd));
+                    }
+#line 9170 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
   case 463:
-#line 3440 "mrbgems/mruby-compiler/core/parse.y"
+#line 3450 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_words(p, list1((yyvsp[0].nd)));
                     }
-#line 9168 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9178 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 464:
-#line 3444 "mrbgems/mruby-compiler/core/parse.y"
+#line 3454 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       node *n = (yyvsp[-1].nd);
                       if (intn((yyvsp[0].nd)->cdr->cdr) > 0) {
@@ -9179,20 +9189,20 @@ yyreduce:
                       }
                       (yyval.nd) = new_words(p, n);
                     }
-#line 9183 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9193 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 465:
-#line 3458 "mrbgems/mruby-compiler/core/parse.y"
+#line 3468 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->lstate = EXPR_ENDARG;
                       (yyval.nd) = new_sym(p, (yyvsp[0].id));
                     }
-#line 9192 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9202 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 466:
-#line 3463 "mrbgems/mruby-compiler/core/parse.y"
+#line 3473 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       node *n = (yyvsp[-1].nd);
                       p->lstate = EXPR_ENDARG;
@@ -9204,43 +9214,43 @@ yyreduce:
                       }
                       (yyval.nd) = new_dsym(p, new_dstr(p, n));
                     }
-#line 9208 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9218 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 467:
-#line 3477 "mrbgems/mruby-compiler/core/parse.y"
+#line 3487 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.id) = (yyvsp[0].id);
                     }
-#line 9216 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9226 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 472:
-#line 3487 "mrbgems/mruby-compiler/core/parse.y"
+#line 3497 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.id) = new_strsym(p, (yyvsp[0].nd));
                     }
-#line 9224 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9234 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 473:
-#line 3491 "mrbgems/mruby-compiler/core/parse.y"
+#line 3501 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.id) = new_strsym(p, (yyvsp[0].nd));
                     }
-#line 9232 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9242 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 474:
-#line 3497 "mrbgems/mruby-compiler/core/parse.y"
+#line 3507 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_symbols(p, list1((yyvsp[0].nd)));
                     }
-#line 9240 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9250 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 475:
-#line 3501 "mrbgems/mruby-compiler/core/parse.y"
+#line 3511 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       node *n = (yyvsp[-1].nd);
                       if (intn((yyvsp[0].nd)->cdr->cdr) > 0) {
@@ -9248,123 +9258,123 @@ yyreduce:
                       }
                       (yyval.nd) = new_symbols(p, n);
                     }
-#line 9252 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9262 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 478:
-#line 3513 "mrbgems/mruby-compiler/core/parse.y"
+#line 3523 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_negate(p, (yyvsp[0].nd));
                     }
-#line 9260 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9270 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 479:
-#line 3517 "mrbgems/mruby-compiler/core/parse.y"
+#line 3527 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_negate(p, (yyvsp[0].nd));
                     }
-#line 9268 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9278 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 480:
-#line 3523 "mrbgems/mruby-compiler/core/parse.y"
+#line 3533 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_lvar(p, (yyvsp[0].id));
                     }
-#line 9276 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9286 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 481:
-#line 3527 "mrbgems/mruby-compiler/core/parse.y"
+#line 3537 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_ivar(p, (yyvsp[0].id));
                     }
-#line 9284 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9294 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 482:
-#line 3531 "mrbgems/mruby-compiler/core/parse.y"
+#line 3541 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_gvar(p, (yyvsp[0].id));
                     }
-#line 9292 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9302 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 483:
-#line 3535 "mrbgems/mruby-compiler/core/parse.y"
+#line 3545 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_cvar(p, (yyvsp[0].id));
                     }
-#line 9300 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9310 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 484:
-#line 3539 "mrbgems/mruby-compiler/core/parse.y"
+#line 3549 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_const(p, (yyvsp[0].id));
                     }
-#line 9308 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9318 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 485:
-#line 3545 "mrbgems/mruby-compiler/core/parse.y"
+#line 3555 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       assignable(p, (yyvsp[0].nd));
                     }
-#line 9316 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9326 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 486:
-#line 3549 "mrbgems/mruby-compiler/core/parse.y"
+#line 3559 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(p, "can't assign to numbered parameter");
                     }
-#line 9324 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9334 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 487:
-#line 3555 "mrbgems/mruby-compiler/core/parse.y"
+#line 3565 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = var_reference(p, (yyvsp[0].nd));
                     }
-#line 9332 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9342 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 488:
-#line 3559 "mrbgems/mruby-compiler/core/parse.y"
+#line 3569 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_nil(p);
                     }
-#line 9340 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9350 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 489:
-#line 3563 "mrbgems/mruby-compiler/core/parse.y"
+#line 3573 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_self(p);
                     }
-#line 9348 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9358 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 490:
-#line 3567 "mrbgems/mruby-compiler/core/parse.y"
+#line 3577 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_true(p);
                     }
-#line 9356 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9366 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 491:
-#line 3571 "mrbgems/mruby-compiler/core/parse.y"
+#line 3581 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_false(p);
                     }
-#line 9364 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9374 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 492:
-#line 3575 "mrbgems/mruby-compiler/core/parse.y"
+#line 3585 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       const char *fn = mrb_sym_name_len(p->mrb, p->filename_sym, NULL);
                       if (!fn) {
@@ -9372,492 +9382,482 @@ yyreduce:
                       }
                       (yyval.nd) = new_str(p, fn, strlen(fn));
                     }
-#line 9376 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9386 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 493:
-#line 3583 "mrbgems/mruby-compiler/core/parse.y"
+#line 3593 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       char buf[16];
 
                       dump_int(p->lineno, buf);
                       (yyval.nd) = new_int(p, buf, 10, 0);
                     }
-#line 9387 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9397 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 494:
-#line 3590 "mrbgems/mruby-compiler/core/parse.y"
+#line 3600 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_fcall(p, MRB_SYM_2(p->mrb, __ENCODING__), 0);
                     }
-#line 9395 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9405 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 497:
-#line 3600 "mrbgems/mruby-compiler/core/parse.y"
+#line 3610 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = 0;
                     }
-#line 9403 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9413 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 498:
-#line 3604 "mrbgems/mruby-compiler/core/parse.y"
+#line 3614 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->lstate = EXPR_BEG;
                       p->cmd_start = TRUE;
                     }
-#line 9412 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9422 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 499:
-#line 3609 "mrbgems/mruby-compiler/core/parse.y"
+#line 3619 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 9420 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 502:
-#line 3625 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = (yyvsp[-1].nd);
-                      p->lstate = EXPR_BEG;
-                      p->cmd_start = TRUE;
-                    }
 #line 9430 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
+  case 502:
+#line 3635 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = (yyvsp[-1].nd);
+                      p->lstate = EXPR_BEG;
+                      p->cmd_start = TRUE;
+                    }
+#line 9440 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
   case 503:
-#line 3631 "mrbgems/mruby-compiler/core/parse.y"
+#line 3641 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_dots(p, (yyvsp[-3].nd));
                     }
-#line 9438 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9448 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 504:
-#line 3635 "mrbgems/mruby-compiler/core/parse.y"
+#line 3645 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_dots(p, 0);
                     }
-#line 9446 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9456 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 506:
-#line 3642 "mrbgems/mruby-compiler/core/parse.y"
+#line 3652 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 9454 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9464 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 507:
-#line 3646 "mrbgems/mruby-compiler/core/parse.y"
+#line 3656 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_dots(p, (yyvsp[-3].nd));
                     }
-#line 9462 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9472 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 508:
-#line 3650 "mrbgems/mruby-compiler/core/parse.y"
+#line 3660 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_dots(p, 0);
                     }
-#line 9470 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9480 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 509:
-#line 3656 "mrbgems/mruby-compiler/core/parse.y"
+#line 3666 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_nest(p);
                     }
-#line 9478 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 510:
-#line 3662 "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 9488 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 511:
-#line 3668 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_kw_arg(p, (yyvsp[0].id), 0);
-                      local_unnest(p);
-                    }
-#line 9497 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 512:
-#line 3675 "mrbgems/mruby-compiler/core/parse.y"
+  case 510:
+#line 3672 "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 9498 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 511:
+#line 3678 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_kw_arg(p, (yyvsp[0].id), 0);
+                      local_unnest(p);
+                    }
 #line 9507 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
+  case 512:
+#line 3685 "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 9517 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
   case 513:
-#line 3681 "mrbgems/mruby-compiler/core/parse.y"
+#line 3691 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_kw_arg(p, (yyvsp[0].id), 0);
                       local_unnest(p);
                     }
-#line 9516 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9526 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 514:
-#line 3688 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = list1((yyvsp[0].nd));
-                    }
-#line 9524 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 515:
-#line 3692 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
-                    }
-#line 9532 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 516:
 #line 3698 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 9540 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9534 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 517:
+  case 515:
 #line 3702 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 9548 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9542 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 516:
+#line 3708 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = list1((yyvsp[0].nd));
+                    }
+#line 9550 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 517:
+#line 3712 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
+                    }
+#line 9558 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 520:
-#line 3712 "mrbgems/mruby-compiler/core/parse.y"
+#line 3722 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_kw_rest_args(p, (yyvsp[0].id));
                     }
-#line 9556 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9566 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 521:
-#line 3716 "mrbgems/mruby-compiler/core/parse.y"
+#line 3726 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_kw_rest_args(p, 0);
                     }
-#line 9564 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9574 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 522:
-#line 3722 "mrbgems/mruby-compiler/core/parse.y"
+#line 3732 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, (yyvsp[-3].nd), (yyvsp[-1].nd), (yyvsp[0].id));
                     }
-#line 9572 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9582 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 523:
-#line 3726 "mrbgems/mruby-compiler/core/parse.y"
+#line 3736 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, (yyvsp[-1].nd), 0, (yyvsp[0].id));
                     }
-#line 9580 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9590 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 524:
-#line 3730 "mrbgems/mruby-compiler/core/parse.y"
+#line 3740 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, 0, (yyvsp[-1].nd), (yyvsp[0].id));
                     }
-#line 9588 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9598 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 525:
-#line 3734 "mrbgems/mruby-compiler/core/parse.y"
+#line 3744 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, 0, 0, (yyvsp[0].id));
                     }
-#line 9596 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9606 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 526:
-#line 3740 "mrbgems/mruby-compiler/core/parse.y"
+#line 3750 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 9604 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9614 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 527:
-#line 3744 "mrbgems/mruby-compiler/core/parse.y"
+#line 3754 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, 0, 0, 0);
                     }
-#line 9612 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9622 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 528:
-#line 3750 "mrbgems/mruby-compiler/core/parse.y"
+#line 3760 "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 9620 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9630 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 529:
-#line 3754 "mrbgems/mruby-compiler/core/parse.y"
+#line 3764 "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 9628 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9638 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 530:
-#line 3758 "mrbgems/mruby-compiler/core/parse.y"
+#line 3768 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, (yyvsp[-3].nd), (yyvsp[-1].nd), 0, 0, (yyvsp[0].nd));
                     }
-#line 9636 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9646 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 531:
-#line 3762 "mrbgems/mruby-compiler/core/parse.y"
+#line 3772 "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 9644 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9654 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 532:
-#line 3766 "mrbgems/mruby-compiler/core/parse.y"
+#line 3776 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, (yyvsp[-3].nd), 0, (yyvsp[-1].id), 0, (yyvsp[0].nd));
                     }
-#line 9652 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9662 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 533:
-#line 3770 "mrbgems/mruby-compiler/core/parse.y"
+#line 3780 "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 9660 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9670 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 534:
-#line 3774 "mrbgems/mruby-compiler/core/parse.y"
+#line 3784 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, (yyvsp[-1].nd), 0, 0, 0, (yyvsp[0].nd));
                     }
-#line 9668 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9678 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 535:
-#line 3778 "mrbgems/mruby-compiler/core/parse.y"
+#line 3788 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, (yyvsp[-3].nd), (yyvsp[-1].id), 0, (yyvsp[0].nd));
                     }
-#line 9676 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9686 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 536:
-#line 3782 "mrbgems/mruby-compiler/core/parse.y"
+#line 3792 "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 9684 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9694 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 537:
-#line 3786 "mrbgems/mruby-compiler/core/parse.y"
+#line 3796 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, (yyvsp[-1].nd), 0, 0, (yyvsp[0].nd));
                     }
-#line 9692 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9702 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 538:
-#line 3790 "mrbgems/mruby-compiler/core/parse.y"
+#line 3800 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, (yyvsp[-3].nd), 0, (yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 9700 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9710 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 539:
-#line 3794 "mrbgems/mruby-compiler/core/parse.y"
+#line 3804 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, 0, (yyvsp[-1].id), 0, (yyvsp[0].nd));
                     }
-#line 9708 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9718 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 540:
-#line 3798 "mrbgems/mruby-compiler/core/parse.y"
+#line 3808 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, 0, (yyvsp[-3].id), (yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 9716 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9726 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 541:
-#line 3802 "mrbgems/mruby-compiler/core/parse.y"
+#line 3812 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, 0, 0, 0, (yyvsp[0].nd));
                     }
-#line 9724 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9734 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 542:
-#line 3806 "mrbgems/mruby-compiler/core/parse.y"
+#line 3816 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_f(p, 0);
                       (yyval.nd) = new_args(p, 0, 0, 0, 0, 0);
                     }
-#line 9733 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9743 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 543:
-#line 3813 "mrbgems/mruby-compiler/core/parse.y"
+#line 3823 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(p, "formal argument cannot be a constant");
                       (yyval.nd) = 0;
                     }
-#line 9742 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9752 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 544:
-#line 3818 "mrbgems/mruby-compiler/core/parse.y"
+#line 3828 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(p, "formal argument cannot be an instance variable");
                       (yyval.nd) = 0;
                     }
-#line 9751 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9761 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 545:
-#line 3823 "mrbgems/mruby-compiler/core/parse.y"
+#line 3833 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(p, "formal argument cannot be a global variable");
                       (yyval.nd) = 0;
                     }
-#line 9760 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9770 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 546:
-#line 3828 "mrbgems/mruby-compiler/core/parse.y"
+#line 3838 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(p, "formal argument cannot be a class variable");
                       (yyval.nd) = 0;
                     }
-#line 9769 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9779 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 547:
-#line 3833 "mrbgems/mruby-compiler/core/parse.y"
+#line 3843 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(p, "formal argument cannot be a numbered parameter");
                       (yyval.nd) = 0;
                     }
-#line 9778 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9788 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 548:
-#line 3840 "mrbgems/mruby-compiler/core/parse.y"
+#line 3850 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.id) = 0;
                     }
-#line 9786 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9796 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 549:
-#line 3844 "mrbgems/mruby-compiler/core/parse.y"
+#line 3854 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_f(p, (yyvsp[0].id));
                       (yyval.id) = (yyvsp[0].id);
                     }
-#line 9795 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9805 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 550:
-#line 3851 "mrbgems/mruby-compiler/core/parse.y"
+#line 3861 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_arg(p, (yyvsp[0].id));
                     }
-#line 9803 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9813 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 551:
-#line 3855 "mrbgems/mruby-compiler/core/parse.y"
+#line 3865 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = local_switch(p);
                     }
-#line 9811 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9821 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 552:
-#line 3859 "mrbgems/mruby-compiler/core/parse.y"
+#line 3869 "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 9821 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9831 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 553:
-#line 3867 "mrbgems/mruby-compiler/core/parse.y"
+#line 3877 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 9829 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9839 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 554:
-#line 3871 "mrbgems/mruby-compiler/core/parse.y"
+#line 3881 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 9837 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9847 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 555:
-#line 3877 "mrbgems/mruby-compiler/core/parse.y"
+#line 3887 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_f(p, (yyvsp[-1].id));
                       local_nest(p);
                       (yyval.id) = (yyvsp[-1].id);
                     }
-#line 9847 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 556:
-#line 3885 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      void_expr_error(p, (yyvsp[0].nd));
-                      (yyval.nd) = cons(nsym((yyvsp[-1].id)), cons((yyvsp[0].nd), locals_node(p)));
-                      local_unnest(p);
-                    }
 #line 9857 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 557:
-#line 3893 "mrbgems/mruby-compiler/core/parse.y"
+  case 556:
+#line 3895 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       void_expr_error(p, (yyvsp[0].nd));
                       (yyval.nd) = cons(nsym((yyvsp[-1].id)), cons((yyvsp[0].nd), locals_node(p)));
@@ -9866,105 +9866,115 @@ yyreduce:
 #line 9867 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
+  case 557:
+#line 3903 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      void_expr_error(p, (yyvsp[0].nd));
+                      (yyval.nd) = cons(nsym((yyvsp[-1].id)), cons((yyvsp[0].nd), locals_node(p)));
+                      local_unnest(p);
+                    }
+#line 9877 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
   case 558:
-#line 3901 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = list1((yyvsp[0].nd));
-                    }
-#line 9875 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 559:
-#line 3905 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
-                    }
-#line 9883 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 560:
 #line 3911 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 9891 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9885 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 561:
+  case 559:
 #line 3915 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 9899 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9893 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 560:
+#line 3921 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = list1((yyvsp[0].nd));
+                    }
+#line 9901 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 561:
+#line 3925 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
+                    }
+#line 9909 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 564:
-#line 3925 "mrbgems/mruby-compiler/core/parse.y"
+#line 3935 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_f(p, (yyvsp[0].id));
                       (yyval.id) = (yyvsp[0].id);
                     }
-#line 9908 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9918 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 565:
-#line 3930 "mrbgems/mruby-compiler/core/parse.y"
+#line 3940 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.id) = intern_op(mul);
                       local_add_f(p, (yyval.id));
                     }
-#line 9917 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9927 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 568:
-#line 3941 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.id) = (yyvsp[0].id);
-                    }
-#line 9925 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 569:
-#line 3945 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.id) = intern_op(and);
-                    }
-#line 9933 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 570:
 #line 3951 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.id) = (yyvsp[0].id);
                     }
-#line 9941 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9935 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 569:
+#line 3955 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.id) = intern_op(and);
+                    }
+#line 9943 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 570:
+#line 3961 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.id) = (yyvsp[0].id);
+                    }
+#line 9951 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 571:
-#line 3955 "mrbgems/mruby-compiler/core/parse.y"
+#line 3965 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.id) = 0;
                     }
-#line 9949 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9959 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 572:
-#line 3961 "mrbgems/mruby-compiler/core/parse.y"
+#line 3971 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                       if (!(yyval.nd)) (yyval.nd) = new_nil(p);
                     }
-#line 9958 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9968 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 573:
-#line 3965 "mrbgems/mruby-compiler/core/parse.y"
+#line 3975 "mrbgems/mruby-compiler/core/parse.y"
                       {p->lstate = EXPR_BEG;}
-#line 9964 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9974 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 574:
-#line 3966 "mrbgems/mruby-compiler/core/parse.y"
+#line 3976 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if ((yyvsp[-1].nd) == 0) {
                         yyerror(p, "can't define singleton method for ().");
@@ -9987,63 +9997,63 @@ yyreduce:
                       }
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 9991 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10001 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 576:
-#line 3992 "mrbgems/mruby-compiler/core/parse.y"
+#line 4002 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 9999 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10009 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 577:
-#line 3998 "mrbgems/mruby-compiler/core/parse.y"
+#line 4008 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1((yyvsp[0].nd));
                       NODE_LINENO((yyval.nd), (yyvsp[0].nd));
                     }
-#line 10008 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10018 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 578:
-#line 4003 "mrbgems/mruby-compiler/core/parse.y"
+#line 4013 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 10016 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10026 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 579:
-#line 4009 "mrbgems/mruby-compiler/core/parse.y"
+#line 4019 "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 10026 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10036 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 580:
-#line 4015 "mrbgems/mruby-compiler/core/parse.y"
+#line 4025 "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 10035 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10045 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 581:
-#line 4020 "mrbgems/mruby-compiler/core/parse.y"
+#line 4030 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = cons(new_sym(p, (yyvsp[-1].id)), label_reference(p, (yyvsp[-1].id)));
                     }
-#line 10043 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10053 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 582:
-#line 4024 "mrbgems/mruby-compiler/core/parse.y"
+#line 4034 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       void_expr_error(p, (yyvsp[0].nd));
                       if (typen((yyvsp[-2].nd)->car) == NODE_DSTR) {
@@ -10053,75 +10063,75 @@ yyreduce:
                         (yyval.nd) = cons(new_sym(p, new_strsym(p, (yyvsp[-2].nd))), (yyvsp[0].nd));
                       }
                     }
-#line 10057 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10067 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 583:
-#line 4034 "mrbgems/mruby-compiler/core/parse.y"
+#line 4044 "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 10066 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10076 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 584:
-#line 4039 "mrbgems/mruby-compiler/core/parse.y"
+#line 4049 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = cons(new_kw_rest_args(p, 0), new_lvar(p, intern_op(pow)));
                     }
-#line 10074 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10084 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 597:
-#line 4065 "mrbgems/mruby-compiler/core/parse.y"
+#line 4075 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.num) = '.';
                     }
-#line 10082 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10092 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 598:
-#line 4069 "mrbgems/mruby-compiler/core/parse.y"
+#line 4079 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.num) = 0;
                     }
-#line 10090 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10100 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 600:
-#line 4076 "mrbgems/mruby-compiler/core/parse.y"
+#line 4086 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.num) = tCOLON2;
                     }
-#line 10098 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10108 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 609:
-#line 4097 "mrbgems/mruby-compiler/core/parse.y"
+#line 4107 "mrbgems/mruby-compiler/core/parse.y"
                       {yyerrok;}
-#line 10104 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10114 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 611:
-#line 4102 "mrbgems/mruby-compiler/core/parse.y"
+#line 4112 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->lineno += (yyvsp[0].num);
                       p->column = 0;
                     }
-#line 10113 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10123 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 615:
-#line 4114 "mrbgems/mruby-compiler/core/parse.y"
+#line 4124 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = 0;
                     }
-#line 10121 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10131 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
 
-#line 10125 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10135 "mrbgems/mruby-compiler/core/y.tab.c"
 
       default: break;
     }
@@ -10353,7 +10363,7 @@ yyreturn:
 #endif
   return yyresult;
 }
-#line 4118 "mrbgems/mruby-compiler/core/parse.y"
+#line 4128 "mrbgems/mruby-compiler/core/parse.y"
 
 #define pylval  (*((YYSTYPE*)(p->ylval)))
 
@@ -10376,7 +10386,7 @@ yyerror(parser_state *p, const char *s)
   }
   else if (p->nerr < sizeof(p->error_buffer) / sizeof(p->error_buffer[0])) {
     n = strlen(s);
-    c = (char *)parser_palloc(p, n + 1);
+    c = (char*)parser_palloc(p, n + 1);
     memcpy(c, s, n + 1);
     p->error_buffer[p->nerr].message = c;
     p->error_buffer[p->nerr].lineno = p->lineno;
@@ -10415,7 +10425,7 @@ yywarning(parser_state *p, const char *s)
   }
   else if (p->nwarn < sizeof(p->warn_buffer) / sizeof(p->warn_buffer[0])) {
     n = strlen(s);
-    c = (char *)parser_palloc(p, n + 1);
+    c = (char*)parser_palloc(p, n + 1);
     memcpy(c, s, n + 1);
     p->warn_buffer[p->nwarn].message = c;
     p->warn_buffer[p->nwarn].lineno = p->lineno;
@@ -11049,10 +11059,10 @@ static int
 parse_string(parser_state *p)
 {
   int c;
-  string_type type = (string_type)(intptr_t)p->lex_strterm->car;
-  int nest_level = intn(p->lex_strterm->cdr->car);
-  int beg = intn(p->lex_strterm->cdr->cdr->car);
-  int end = intn(p->lex_strterm->cdr->cdr->cdr);
+  string_type type = (string_type)p->lex_strterm->type;
+  int nest_level = p->lex_strterm->level;
+  int beg = p->lex_strterm->paren;
+  int end = p->lex_strterm->term;
   parser_heredoc_info *hinfo = (type & STR_FUNC_HEREDOC) ? parsing_heredoc_info(p) : NULL;
 
   mrb_bool unindent = hinfo && hinfo->remove_indent;
@@ -11128,11 +11138,11 @@ parse_string(parser_state *p)
     }
     else if (c == beg) {
       nest_level++;
-      p->lex_strterm->cdr->car = nint(nest_level);
+      p->lex_strterm->level = nest_level;
     }
     else if (c == end) {
       nest_level--;
-      p->lex_strterm->cdr->car = nint(nest_level);
+      p->lex_strterm->level = nest_level;
     }
     else if (c == '\\') {
       c = nextc(p);
@@ -12824,7 +12834,7 @@ parser_update_cxt(parser_state *p, mrbc_context *cxt)
     i++;
     n = n->cdr;
   }
-  cxt->syms = (mrb_sym *)mrb_realloc(p->mrb, cxt->syms, i*sizeof(mrb_sym));
+  cxt->syms = (mrb_sym*)mrb_realloc(p->mrb, cxt->syms, i*sizeof(mrb_sym));
   cxt->slen = i;
   for (i=0, n=n0; n; i++,n=n->cdr) {
     cxt->syms[i] = sym(n->car);
@@ -12882,7 +12892,7 @@ mrb_parser_new(mrb_state *mrb)
 
   pool = mrb_pool_open(mrb);
   if (!pool) return NULL;
-  p = (parser_state *)mrb_pool_alloc(pool, sizeof(parser_state));
+  p = (parser_state*)mrb_pool_alloc(pool, sizeof(parser_state));
   if (!p) return NULL;
 
   *p = parser_state_zero;
@@ -12907,8 +12917,6 @@ mrb_parser_new(mrb_state *mrb)
   p->tokbuf = p->buf;
 
   p->lex_strterm = NULL;
-  p->all_heredocs = p->parsing_heredoc = NULL;
-  p->lex_strterm_before_heredoc = NULL;
 
   p->current_filename_index = -1;
   p->filename_table = NULL;
@@ -12928,7 +12936,7 @@ mrb_parser_free(parser_state *p) {
 MRB_API mrbc_context*
 mrbc_context_new(mrb_state *mrb)
 {
-  return (mrbc_context *)mrb_calloc(mrb, 1, sizeof(mrbc_context));
+  return (mrbc_context*)mrb_calloc(mrb, 1, sizeof(mrbc_context));
 }
 
 MRB_API void
@@ -12944,7 +12952,7 @@ mrbc_filename(mrb_state *mrb, mrbc_context *c, const char *s)
 {
   if (s) {
     size_t len = strlen(s);
-    char *p = (char *)mrb_malloc(mrb, len + 1);
+    char *p = (char*)mrb_malloc(mrb, len + 1);
 
     memcpy(p, s, len + 1);
     if (c->filename) {
@@ -13021,8 +13029,8 @@ mrb_parse_file_continue(mrb_state *mrb, FILE *f, const void *prebuf, size_t preb
   p = mrb_parser_new(mrb);
   if (!p) return NULL;
   if (prebuf) {
-    p->s = (const char *)prebuf;
-    p->send = (const char *)prebuf + prebufsize;
+    p->s = (const char*)prebuf;
+    p->send = (const char*)prebuf + prebufsize;
   }
   else {
     p->s = p->send = NULL;
@@ -13170,7 +13178,7 @@ mrb_load_detect_file_cxt(mrb_state *mrb, FILE *fp, mrbc_context *c)
 
     binsize = bin_to_uint32(leading.h.binary_size);
     bin_obj = mrb_str_new(mrb, NULL, binsize);
-    bin = (uint8_t *)RSTRING_PTR(bin_obj);
+    bin = (uint8_t*)RSTRING_PTR(bin_obj);
     if ((size_t)binsize > bufsize)  {
       memcpy(bin, leading.b, bufsize);
       if (fread(bin + bufsize, binsize - bufsize, 1, fp) == 0) {