From a29afe7fe70fec71de385d993e7191bdad5e1e29 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Fri, 26 Sep 2025 05:29:47 +0900
Subject: [PATCH] mruby-compiler: remove unused NODE_MATCH node type and
 related code

Remove NODE_MATCH enum value, structure definition, accessor macro,
parser dump case, codegen case, and gen_match_var function. This
node type was never actually used in the parser.

Co-authored-by: Claude <noreply@anthropic.com>
---
 mrbgems/mruby-compiler/core/codegen.c |   14 -
 mrbgems/mruby-compiler/core/node.h    |    7 -
 mrbgems/mruby-compiler/core/parse.y   |   11 -
 mrbgems/mruby-compiler/core/y.tab.c   | 2061 ++++++++++++-------------
 4 files changed, 1025 insertions(+), 1068 deletions(-)

diff --git a/mrbgems/mruby-compiler/core/codegen.c b/mrbgems/mruby-compiler/core/codegen.c
index a49630dc8..c8da082a1 100644
--- a/mrbgems/mruby-compiler/core/codegen.c
+++ b/mrbgems/mruby-compiler/core/codegen.c
@@ -5082,16 +5082,6 @@ gen_dvar_var(codegen_scope *s, node *varnode, int val)
   }
 }
 
-static void
-gen_match_var(codegen_scope *s, node *varnode, int val)
-{
-  struct mrb_ast_match_node *n = (struct mrb_ast_match_node*)varnode;
-  // MATCH nodes are not currently used in mruby, but provide basic implementation
-  if (val) {
-    codegen(s, n->pattern, val);
-  }
-}
-
 // Group 11: Operators and Expressions
 static void
 gen_not_var(codegen_scope *s, node *varnode, int val)
@@ -5710,10 +5700,6 @@ codegen(codegen_scope *s, node *tree, int val)
     gen_dvar_var(s, tree, val);
     break;
 
-  case NODE_MATCH:
-    gen_match_var(s, tree, val);
-    break;
-
   case NODE_NOT:
     gen_not_var(s, tree, val);
     break;
diff --git a/mrbgems/mruby-compiler/core/node.h b/mrbgems/mruby-compiler/core/node.h
index 93c522a8a..858d94226 100644
--- a/mrbgems/mruby-compiler/core/node.h
+++ b/mrbgems/mruby-compiler/core/node.h
@@ -48,7 +48,6 @@ enum node_type {
   NODE_NVAR,
   NODE_NTH_REF,
   NODE_BACK_REF,
-  NODE_MATCH,
   NODE_INT,
   NODE_BIGINT,
   NODE_FLOAT,
@@ -675,16 +674,10 @@ struct mrb_ast_dvar_node {
   mrb_sym name;
 };
 
-struct mrb_ast_match_node {
-  struct mrb_ast_var_header header;
-  struct mrb_ast_node *pattern;
-};
-
 #define nth_ref_node(n) ((struct mrb_ast_nth_ref_node*)(n))
 #define back_ref_node(n) ((struct mrb_ast_back_ref_node*)(n))
 #define nvar_node(n) ((struct mrb_ast_nvar_node*)(n))
 #define dvar_node(n) ((struct mrb_ast_dvar_node*)(n))
-#define match_node(n) ((struct mrb_ast_match_node*)(n))
 
 #define NTH_REF_NODE_NTH(n) (nth_ref_node(n)->nth)
 #define BACK_REF_NODE_TYPE(n) (back_ref_node(n)->type)
diff --git a/mrbgems/mruby-compiler/core/parse.y b/mrbgems/mruby-compiler/core/parse.y
index cb47995eb..155913a8b 100644
--- a/mrbgems/mruby-compiler/core/parse.y
+++ b/mrbgems/mruby-compiler/core/parse.y
@@ -1894,7 +1894,6 @@ prohibit_literals(parser_state *p, node *n)
     case NODE_STR:
     case NODE_XSTR:
     case NODE_REGX:
-    case NODE_MATCH:
     case NODE_FLOAT:
     case NODE_ARRAY:
     case NODE_HEREDOC:
@@ -8189,16 +8188,6 @@ mrb_parser_dump(mrb_state *mrb, node *tree, int offset)
     printf("NODE_RETRY\n");
     break;
 
-  case NODE_MATCH:
-    printf("NODE_MATCH:\n");
-    dump_prefix(offset + 1, lineno);
-    printf("lhs:\n");
-    mrb_parser_dump(mrb, tree->car, offset + 2);
-    dump_prefix(offset + 1, lineno);
-    printf("rhs:\n");
-    mrb_parser_dump(mrb, tree->cdr, offset + 2);
-    break;
-
   case NODE_BACK_REF:
     printf("NODE_BACK_REF: $%c\n", node_to_int(tree));
     break;
diff --git a/mrbgems/mruby-compiler/core/y.tab.c b/mrbgems/mruby-compiler/core/y.tab.c
index 28ecbe7a1..99584ff4a 100644
--- a/mrbgems/mruby-compiler/core/y.tab.c
+++ b/mrbgems/mruby-compiler/core/y.tab.c
@@ -1956,7 +1956,6 @@ prohibit_literals(parser_state *p, node *n)
     case NODE_STR:
     case NODE_XSTR:
     case NODE_REGX:
-    case NODE_MATCH:
     case NODE_FLOAT:
     case NODE_ARRAY:
     case NODE_HEREDOC:
@@ -1970,7 +1969,7 @@ prohibit_literals(parser_state *p, node *n)
 /* xxx ----------------------------- */
 
 
-#line 1974 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 1973 "mrbgems/mruby-compiler/core/y.tab.c"
 
 # ifndef YY_CAST
 #  ifdef __cplusplus
@@ -2141,7 +2140,7 @@ extern int yydebug;
 #if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
 union YYSTYPE
 {
-#line 1917 "mrbgems/mruby-compiler/core/parse.y"
+#line 1916 "mrbgems/mruby-compiler/core/parse.y"
 
     node *nd;
     mrb_sym id;
@@ -2149,7 +2148,7 @@ union YYSTYPE
     stack_type stack;
     const struct vtable *vars;
 
-#line 2153 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 2152 "mrbgems/mruby-compiler/core/y.tab.c"
 
 };
 typedef union YYSTYPE YYSTYPE;
@@ -2908,69 +2907,69 @@ static const yytype_uint8 yytranslate[] =
 /* YYRLINE[YYN] -- Source line where rule number YYN was defined.  */
 static const yytype_int16 yyrline[] =
 {
-       0,  2088,  2088,  2088,  2098,  2104,  2108,  2112,  2116,  2122,
-    2124,  2123,  2137,  2163,  2169,  2173,  2177,  2183,  2189,  2189,
-    2193,  2197,  2201,  2205,  2214,  2223,  2227,  2232,  2233,  2237,
-    2241,  2245,  2249,  2255,  2258,  2262,  2266,  2270,  2274,  2278,
-    2283,  2287,  2296,  2305,  2314,  2323,  2330,  2331,  2335,  2338,
-    2339,  2343,  2347,  2351,  2355,  2358,  2368,  2367,  2382,  2391,
-    2392,  2395,  2396,  2403,  2402,  2417,  2421,  2426,  2430,  2435,
-    2439,  2444,  2448,  2452,  2456,  2460,  2466,  2470,  2476,  2477,
-    2483,  2487,  2491,  2495,  2499,  2503,  2507,  2511,  2515,  2519,
-    2525,  2526,  2532,  2536,  2542,  2546,  2552,  2556,  2560,  2564,
-    2568,  2572,  2578,  2584,  2591,  2595,  2599,  2603,  2607,  2611,
-    2617,  2623,  2628,  2634,  2638,  2641,  2645,  2649,  2656,  2657,
-    2658,  2659,  2664,  2671,  2672,  2675,  2679,  2679,  2685,  2686,
-    2687,  2688,  2689,  2690,  2691,  2692,  2693,  2694,  2695,  2696,
-    2697,  2698,  2699,  2700,  2701,  2702,  2703,  2704,  2705,  2706,
-    2707,  2708,  2709,  2710,  2711,  2712,  2713,  2714,  2717,  2717,
-    2717,  2718,  2718,  2719,  2719,  2719,  2720,  2720,  2720,  2720,
-    2721,  2721,  2721,  2722,  2722,  2722,  2723,  2723,  2723,  2723,
-    2724,  2724,  2724,  2724,  2725,  2725,  2725,  2725,  2726,  2726,
-    2726,  2726,  2727,  2727,  2727,  2727,  2728,  2728,  2731,  2735,
-    2739,  2743,  2747,  2751,  2755,  2760,  2765,  2770,  2774,  2778,
-    2782,  2786,  2790,  2794,  2798,  2802,  2806,  2810,  2814,  2818,
-    2822,  2826,  2830,  2834,  2838,  2842,  2846,  2850,  2854,  2858,
-    2862,  2866,  2870,  2874,  2878,  2882,  2886,  2890,  2894,  2898,
-    2902,  2906,  2910,  2914,  2918,  2927,  2936,  2945,  2954,  2960,
-    2961,  2965,  2969,  2975,  2979,  2986,  2990,  2999,  3016,  3017,
-    3020,  3021,  3022,  3026,  3030,  3036,  3041,  3045,  3049,  3053,
-    3059,  3059,  3070,  3074,  3080,  3084,  3090,  3093,  3098,  3102,
-    3106,  3111,  3115,  3121,  3126,  3130,  3136,  3137,  3141,  3145,
-    3146,  3147,  3148,  3149,  3154,  3153,  3165,  3169,  3164,  3174,
-    3174,  3178,  3182,  3186,  3190,  3194,  3198,  3202,  3206,  3210,
-    3214,  3218,  3219,  3225,  3232,  3224,  3245,  3253,  3261,  3261,
-    3261,  3268,  3268,  3268,  3275,  3281,  3286,  3288,  3285,  3297,
-    3295,  3313,  3318,  3311,  3335,  3333,  3349,  3359,  3370,  3374,
-    3378,  3382,  3388,  3395,  3396,  3397,  3400,  3401,  3404,  3405,
-    3413,  3414,  3420,  3424,  3427,  3431,  3435,  3439,  3444,  3448,
-    3452,  3456,  3462,  3461,  3471,  3475,  3479,  3483,  3489,  3494,
-    3499,  3503,  3507,  3511,  3515,  3519,  3523,  3527,  3531,  3535,
-    3539,  3543,  3547,  3551,  3555,  3561,  3566,  3573,  3573,  3577,
-    3582,  3588,  3592,  3598,  3599,  3602,  3607,  3610,  3614,  3620,
-    3624,  3631,  3630,  3647,  3652,  3656,  3661,  3668,  3672,  3676,
-    3680,  3684,  3688,  3692,  3696,  3700,  3707,  3706,  3721,  3720,
-    3736,  3744,  3753,  3756,  3763,  3766,  3770,  3771,  3774,  3778,
-    3781,  3785,  3788,  3789,  3790,  3791,  3794,  3795,  3801,  3806,
-    3811,  3816,  3822,  3823,  3829,  3835,  3834,  3846,  3850,  3856,
-    3860,  3866,  3875,  3886,  3889,  3890,  3893,  3899,  3905,  3906,
-    3909,  3916,  3915,  3930,  3934,  3942,  3946,  3958,  3965,  3972,
-    3973,  3974,  3975,  3976,  3980,  3986,  3990,  3998,  3999,  4000,
-    4004,  4010,  4014,  4018,  4022,  4026,  4032,  4036,  4042,  4046,
-    4050,  4054,  4058,  4062,  4066,  4074,  4081,  4087,  4088,  4092,
-    4096,  4095,  4112,  4113,  4116,  4122,  4126,  4132,  4133,  4137,
-    4141,  4147,  4151,  4157,  4163,  4170,  4176,  4183,  4187,  4193,
-    4197,  4203,  4204,  4207,  4211,  4217,  4221,  4225,  4229,  4235,
-    4240,  4245,  4249,  4253,  4257,  4261,  4265,  4269,  4273,  4277,
-    4281,  4285,  4289,  4293,  4297,  4302,  4308,  4313,  4318,  4323,
-    4328,  4335,  4339,  4346,  4351,  4350,  4362,  4366,  4372,  4380,
-    4388,  4396,  4400,  4406,  4410,  4416,  4417,  4420,  4425,  4432,
-    4433,  4436,  4440,  4446,  4450,  4456,  4462,  4462,  4469,  4470,
-    4476,  4480,  4486,  4492,  4497,  4501,  4506,  4511,  4527,  4532,
-    4538,  4539,  4540,  4543,  4544,  4545,  4546,  4549,  4550,  4551,
-    4554,  4555,  4558,  4562,  4568,  4569,  4575,  4576,  4579,  4580,
-    4583,  4586,  4587,  4588,  4591,  4592,  4595,  4600,  4603,  4604,
-    4608
+       0,  2087,  2087,  2087,  2097,  2103,  2107,  2111,  2115,  2121,
+    2123,  2122,  2136,  2162,  2168,  2172,  2176,  2182,  2188,  2188,
+    2192,  2196,  2200,  2204,  2213,  2222,  2226,  2231,  2232,  2236,
+    2240,  2244,  2248,  2254,  2257,  2261,  2265,  2269,  2273,  2277,
+    2282,  2286,  2295,  2304,  2313,  2322,  2329,  2330,  2334,  2337,
+    2338,  2342,  2346,  2350,  2354,  2357,  2367,  2366,  2381,  2390,
+    2391,  2394,  2395,  2402,  2401,  2416,  2420,  2425,  2429,  2434,
+    2438,  2443,  2447,  2451,  2455,  2459,  2465,  2469,  2475,  2476,
+    2482,  2486,  2490,  2494,  2498,  2502,  2506,  2510,  2514,  2518,
+    2524,  2525,  2531,  2535,  2541,  2545,  2551,  2555,  2559,  2563,
+    2567,  2571,  2577,  2583,  2590,  2594,  2598,  2602,  2606,  2610,
+    2616,  2622,  2627,  2633,  2637,  2640,  2644,  2648,  2655,  2656,
+    2657,  2658,  2663,  2670,  2671,  2674,  2678,  2678,  2684,  2685,
+    2686,  2687,  2688,  2689,  2690,  2691,  2692,  2693,  2694,  2695,
+    2696,  2697,  2698,  2699,  2700,  2701,  2702,  2703,  2704,  2705,
+    2706,  2707,  2708,  2709,  2710,  2711,  2712,  2713,  2716,  2716,
+    2716,  2717,  2717,  2718,  2718,  2718,  2719,  2719,  2719,  2719,
+    2720,  2720,  2720,  2721,  2721,  2721,  2722,  2722,  2722,  2722,
+    2723,  2723,  2723,  2723,  2724,  2724,  2724,  2724,  2725,  2725,
+    2725,  2725,  2726,  2726,  2726,  2726,  2727,  2727,  2730,  2734,
+    2738,  2742,  2746,  2750,  2754,  2759,  2764,  2769,  2773,  2777,
+    2781,  2785,  2789,  2793,  2797,  2801,  2805,  2809,  2813,  2817,
+    2821,  2825,  2829,  2833,  2837,  2841,  2845,  2849,  2853,  2857,
+    2861,  2865,  2869,  2873,  2877,  2881,  2885,  2889,  2893,  2897,
+    2901,  2905,  2909,  2913,  2917,  2926,  2935,  2944,  2953,  2959,
+    2960,  2964,  2968,  2974,  2978,  2985,  2989,  2998,  3015,  3016,
+    3019,  3020,  3021,  3025,  3029,  3035,  3040,  3044,  3048,  3052,
+    3058,  3058,  3069,  3073,  3079,  3083,  3089,  3092,  3097,  3101,
+    3105,  3110,  3114,  3120,  3125,  3129,  3135,  3136,  3140,  3144,
+    3145,  3146,  3147,  3148,  3153,  3152,  3164,  3168,  3163,  3173,
+    3173,  3177,  3181,  3185,  3189,  3193,  3197,  3201,  3205,  3209,
+    3213,  3217,  3218,  3224,  3231,  3223,  3244,  3252,  3260,  3260,
+    3260,  3267,  3267,  3267,  3274,  3280,  3285,  3287,  3284,  3296,
+    3294,  3312,  3317,  3310,  3334,  3332,  3348,  3358,  3369,  3373,
+    3377,  3381,  3387,  3394,  3395,  3396,  3399,  3400,  3403,  3404,
+    3412,  3413,  3419,  3423,  3426,  3430,  3434,  3438,  3443,  3447,
+    3451,  3455,  3461,  3460,  3470,  3474,  3478,  3482,  3488,  3493,
+    3498,  3502,  3506,  3510,  3514,  3518,  3522,  3526,  3530,  3534,
+    3538,  3542,  3546,  3550,  3554,  3560,  3565,  3572,  3572,  3576,
+    3581,  3587,  3591,  3597,  3598,  3601,  3606,  3609,  3613,  3619,
+    3623,  3630,  3629,  3646,  3651,  3655,  3660,  3667,  3671,  3675,
+    3679,  3683,  3687,  3691,  3695,  3699,  3706,  3705,  3720,  3719,
+    3735,  3743,  3752,  3755,  3762,  3765,  3769,  3770,  3773,  3777,
+    3780,  3784,  3787,  3788,  3789,  3790,  3793,  3794,  3800,  3805,
+    3810,  3815,  3821,  3822,  3828,  3834,  3833,  3845,  3849,  3855,
+    3859,  3865,  3874,  3885,  3888,  3889,  3892,  3898,  3904,  3905,
+    3908,  3915,  3914,  3929,  3933,  3941,  3945,  3957,  3964,  3971,
+    3972,  3973,  3974,  3975,  3979,  3985,  3989,  3997,  3998,  3999,
+    4003,  4009,  4013,  4017,  4021,  4025,  4031,  4035,  4041,  4045,
+    4049,  4053,  4057,  4061,  4065,  4073,  4080,  4086,  4087,  4091,
+    4095,  4094,  4111,  4112,  4115,  4121,  4125,  4131,  4132,  4136,
+    4140,  4146,  4150,  4156,  4162,  4169,  4175,  4182,  4186,  4192,
+    4196,  4202,  4203,  4206,  4210,  4216,  4220,  4224,  4228,  4234,
+    4239,  4244,  4248,  4252,  4256,  4260,  4264,  4268,  4272,  4276,
+    4280,  4284,  4288,  4292,  4296,  4301,  4307,  4312,  4317,  4322,
+    4327,  4334,  4338,  4345,  4350,  4349,  4361,  4365,  4371,  4379,
+    4387,  4395,  4399,  4405,  4409,  4415,  4416,  4419,  4424,  4431,
+    4432,  4435,  4439,  4445,  4449,  4455,  4461,  4461,  4468,  4469,
+    4475,  4479,  4485,  4491,  4496,  4500,  4505,  4510,  4526,  4531,
+    4537,  4538,  4539,  4542,  4543,  4544,  4545,  4548,  4549,  4550,
+    4553,  4554,  4557,  4561,  4567,  4568,  4574,  4575,  4578,  4579,
+    4582,  4585,  4586,  4587,  4590,  4591,  4594,  4599,  4602,  4603,
+    4607
 };
 #endif
 
@@ -6947,7 +6946,7 @@ YYLTYPE yylloc = yyloc_default;
 
 
 
-#line 6951 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 6950 "mrbgems/mruby-compiler/core/y.tab.c"
 
   yylsp[0] = yylloc;
   goto yysetstate;
@@ -7160,84 +7159,84 @@ yyreduce:
   switch (yyn)
     {
   case 2: /* $@1: %empty  */
-#line 2088 "mrbgems/mruby-compiler/core/parse.y"
+#line 2087 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->lstate = EXPR_BEG;
                       if (!p->locals) p->locals = cons(0,0);
                     }
-#line 7169 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7168 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 3: /* program: $@1 top_compstmt  */
-#line 2093 "mrbgems/mruby-compiler/core/parse.y"
+#line 2092 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->tree = new_scope(p, (yyvsp[0].nd));
                     }
-#line 7177 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7176 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 4: /* top_compstmt: top_stmts opt_terms  */
-#line 2099 "mrbgems/mruby-compiler/core/parse.y"
+#line 2098 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 7185 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7184 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 5: /* top_stmts: none  */
-#line 2105 "mrbgems/mruby-compiler/core/parse.y"
+#line 2104 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_stmts(p, 0);
                     }
-#line 7193 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7192 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 6: /* top_stmts: top_stmt  */
-#line 2109 "mrbgems/mruby-compiler/core/parse.y"
+#line 2108 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_stmts(p, (yyvsp[0].nd));
                     }
-#line 7201 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7200 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 7: /* top_stmts: top_stmts terms top_stmt  */
-#line 2113 "mrbgems/mruby-compiler/core/parse.y"
+#line 2112 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-2].nd), newline_node((yyvsp[0].nd)));
                     }
-#line 7209 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7208 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 8: /* top_stmts: error top_stmt  */
-#line 2117 "mrbgems/mruby-compiler/core/parse.y"
+#line 2116 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_stmts(p, 0);
                     }
-#line 7217 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7216 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 10: /* @2: %empty  */
-#line 2124 "mrbgems/mruby-compiler/core/parse.y"
+#line 2123 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = local_switch(p);
                       nvars_block(p);
                     }
-#line 7226 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7225 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 11: /* top_stmt: "'BEGIN'" @2 '{' top_compstmt '}'  */
-#line 2129 "mrbgems/mruby-compiler/core/parse.y"
+#line 2128 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[-4]), p, "BEGIN not supported");
                       local_resume(p, (yyvsp[-3].nd));
                       nvars_unnest(p);
                       (yyval.nd) = 0;
                     }
-#line 7237 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7236 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 12: /* bodystmt: compstmt opt_rescue opt_else opt_ensure  */
-#line 2141 "mrbgems/mruby-compiler/core/parse.y"
+#line 2140 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if ((yyvsp[-2].nd)) {
                         (yyval.nd) = new_rescue(p, (yyvsp[-3].nd), (yyvsp[-2].nd), (yyvsp[-1].nd));
@@ -7258,91 +7257,91 @@ yyreduce:
                         }
                       }
                     }
-#line 7262 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7261 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 13: /* compstmt: stmts opt_terms  */
-#line 2164 "mrbgems/mruby-compiler/core/parse.y"
+#line 2163 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 7270 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7269 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 14: /* stmts: none  */
-#line 2170 "mrbgems/mruby-compiler/core/parse.y"
+#line 2169 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_stmts(p, 0);
                     }
-#line 7278 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7277 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 15: /* stmts: stmt  */
-#line 2174 "mrbgems/mruby-compiler/core/parse.y"
+#line 2173 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_stmts(p, (yyvsp[0].nd));
                     }
-#line 7286 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7285 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 16: /* stmts: stmts terms stmt  */
-#line 2178 "mrbgems/mruby-compiler/core/parse.y"
+#line 2177 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       /* Update the cons-list inside the existing variable-sized node */
                       STMTS_NODE_STMTS((yyvsp[-2].nd)) = push(STMTS_NODE_STMTS((yyvsp[-2].nd)), newline_node((yyvsp[0].nd)));
                       (yyval.nd) = (yyvsp[-2].nd);
                     }
-#line 7296 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7295 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 17: /* stmts: error stmt  */
-#line 2184 "mrbgems/mruby-compiler/core/parse.y"
+#line 2183 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_stmts(p, (yyvsp[0].nd));
                     }
-#line 7304 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7303 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 18: /* $@3: %empty  */
-#line 2189 "mrbgems/mruby-compiler/core/parse.y"
+#line 2188 "mrbgems/mruby-compiler/core/parse.y"
                                      {p->lstate = EXPR_FNAME;}
-#line 7310 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7309 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 19: /* stmt: "'alias'" fsym $@3 fsym  */
-#line 2190 "mrbgems/mruby-compiler/core/parse.y"
+#line 2189 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_alias(p, (yyvsp[-2].id), (yyvsp[0].id));
                     }
-#line 7318 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7317 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 20: /* stmt: "'undef'" undef_list  */
-#line 2194 "mrbgems/mruby-compiler/core/parse.y"
+#line 2193 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_undef(p, (yyvsp[0].nd));
                     }
-#line 7326 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7325 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 21: /* stmt: stmt "'if' modifier" expr_value  */
-#line 2198 "mrbgems/mruby-compiler/core/parse.y"
+#line 2197 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_if(p, cond((yyvsp[0].nd)), (yyvsp[-2].nd), 0);
                     }
-#line 7334 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7333 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 22: /* stmt: stmt "'unless' modifier" expr_value  */
-#line 2202 "mrbgems/mruby-compiler/core/parse.y"
+#line 2201 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_if(p, cond((yyvsp[0].nd)), 0, (yyvsp[-2].nd));
                     }
-#line 7342 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7341 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 23: /* stmt: stmt "'while' modifier" expr_value  */
-#line 2206 "mrbgems/mruby-compiler/core/parse.y"
+#line 2205 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if ((yyvsp[-2].nd) && node_type_p((yyvsp[-2].nd), NODE_BEGIN)) {
                         (yyval.nd) = new_while_mod(p, cond((yyvsp[0].nd)), (yyvsp[-2].nd));
@@ -7351,11 +7350,11 @@ yyreduce:
                         (yyval.nd) = new_while(p, cond((yyvsp[0].nd)), (yyvsp[-2].nd));
                       }
                     }
-#line 7355 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7354 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 24: /* stmt: stmt "'until' modifier" expr_value  */
-#line 2215 "mrbgems/mruby-compiler/core/parse.y"
+#line 2214 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if ((yyvsp[-2].nd) && node_type_p((yyvsp[-2].nd), NODE_BEGIN)) {
                         (yyval.nd) = new_until_mod(p, cond((yyvsp[0].nd)), (yyvsp[-2].nd));
@@ -7364,127 +7363,127 @@ yyreduce:
                         (yyval.nd) = new_until(p, cond((yyvsp[0].nd)), (yyvsp[-2].nd));
                       }
                     }
-#line 7368 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7367 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 25: /* stmt: stmt "'rescue' modifier" stmt  */
-#line 2224 "mrbgems/mruby-compiler/core/parse.y"
+#line 2223 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_mod_rescue(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 7376 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7375 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 26: /* stmt: "'END'" '{' compstmt '}'  */
-#line 2228 "mrbgems/mruby-compiler/core/parse.y"
+#line 2227 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[-3]), p, "END not supported");
                       (yyval.nd) = new_postexe(p, (yyvsp[-1].nd));
                     }
-#line 7385 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7384 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 28: /* stmt: mlhs '=' command_call  */
-#line 2234 "mrbgems/mruby-compiler/core/parse.y"
+#line 2233 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_masgn(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 7393 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7392 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 29: /* stmt: lhs '=' mrhs  */
-#line 2238 "mrbgems/mruby-compiler/core/parse.y"
+#line 2237 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_asgn(p, (yyvsp[-2].nd), new_array(p, (yyvsp[0].nd)));
                     }
-#line 7401 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7400 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 30: /* stmt: mlhs '=' arg  */
-#line 2242 "mrbgems/mruby-compiler/core/parse.y"
+#line 2241 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_masgn(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 7409 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7408 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 31: /* stmt: mlhs '=' mrhs  */
-#line 2246 "mrbgems/mruby-compiler/core/parse.y"
+#line 2245 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_masgn(p, (yyvsp[-2].nd), new_array(p, (yyvsp[0].nd)));
                     }
-#line 7417 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7416 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 32: /* stmt: arg "=>" "local variable or method"  */
-#line 2250 "mrbgems/mruby-compiler/core/parse.y"
+#line 2249 "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 7427 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7426 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 34: /* command_asgn: lhs '=' command_rhs  */
-#line 2259 "mrbgems/mruby-compiler/core/parse.y"
+#line 2258 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_asgn(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 7435 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7434 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 35: /* command_asgn: var_lhs tOP_ASGN command_rhs  */
-#line 2263 "mrbgems/mruby-compiler/core/parse.y"
+#line 2262 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_op_asgn(p, (yyvsp[-2].nd), (yyvsp[-1].id), (yyvsp[0].nd));
                     }
-#line 7443 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7442 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 36: /* command_asgn: primary_value '[' opt_call_args ']' tOP_ASGN command_rhs  */
-#line 2267 "mrbgems/mruby-compiler/core/parse.y"
+#line 2266 "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 7451 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7450 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 37: /* command_asgn: primary_value call_op "local variable or method" tOP_ASGN command_rhs  */
-#line 2271 "mrbgems/mruby-compiler/core/parse.y"
+#line 2270 "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 7459 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7458 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 38: /* command_asgn: primary_value call_op "constant" tOP_ASGN command_rhs  */
-#line 2275 "mrbgems/mruby-compiler/core/parse.y"
+#line 2274 "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 7467 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7466 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 39: /* command_asgn: primary_value "::" "constant" tOP_ASGN command_call  */
-#line 2279 "mrbgems/mruby-compiler/core/parse.y"
+#line 2278 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[-4]), p, "constant re-assignment");
                       (yyval.nd) = 0;
                     }
-#line 7476 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7475 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 40: /* command_asgn: primary_value "::" "local variable or method" tOP_ASGN command_rhs  */
-#line 2284 "mrbgems/mruby-compiler/core/parse.y"
+#line 2283 "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 7484 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7483 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 41: /* command_asgn: defn_head f_opt_arglist_paren '=' command  */
-#line 2288 "mrbgems/mruby-compiler/core/parse.y"
+#line 2287 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-3].nd);
                       endless_method_name(p, (yyvsp[-3].nd));
@@ -7493,11 +7492,11 @@ yyreduce:
                       nvars_unnest(p);
                       p->in_def--;
                     }
-#line 7497 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7496 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 42: /* command_asgn: defn_head f_opt_arglist_paren '=' command "'rescue' modifier" arg  */
-#line 2297 "mrbgems/mruby-compiler/core/parse.y"
+#line 2296 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-5].nd);
                       endless_method_name(p, (yyvsp[-5].nd));
@@ -7506,11 +7505,11 @@ yyreduce:
                       nvars_unnest(p);
                       p->in_def--;
                     }
-#line 7510 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7509 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 43: /* command_asgn: defs_head f_opt_arglist_paren '=' command  */
-#line 2306 "mrbgems/mruby-compiler/core/parse.y"
+#line 2305 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-3].nd);
                       void_expr_error(p, (yyvsp[0].nd));
@@ -7519,11 +7518,11 @@ yyreduce:
                       p->in_def--;
                       p->in_single--;
                     }
-#line 7523 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7522 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 44: /* command_asgn: defs_head f_opt_arglist_paren '=' command "'rescue' modifier" arg  */
-#line 2315 "mrbgems/mruby-compiler/core/parse.y"
+#line 2314 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-5].nd);
                       void_expr_error(p, (yyvsp[-2].nd));
@@ -7532,79 +7531,79 @@ yyreduce:
                       p->in_def--;
                       p->in_single--;
                     }
-#line 7536 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7535 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 45: /* command_asgn: backref tOP_ASGN command_rhs  */
-#line 2324 "mrbgems/mruby-compiler/core/parse.y"
+#line 2323 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       backref_error(p, (yyvsp[-2].nd));
                       (yyval.nd) = new_stmts(p, 0);
                     }
-#line 7545 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7544 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 47: /* command_rhs: command_call "'rescue' modifier" stmt  */
-#line 2332 "mrbgems/mruby-compiler/core/parse.y"
+#line 2331 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_mod_rescue(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 7553 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7552 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 50: /* expr: expr "'and'" expr  */
-#line 2340 "mrbgems/mruby-compiler/core/parse.y"
+#line 2339 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_and(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 7561 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7560 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 51: /* expr: expr "'or'" expr  */
-#line 2344 "mrbgems/mruby-compiler/core/parse.y"
+#line 2343 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_or(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 7569 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7568 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 52: /* expr: "'not'" opt_nl expr  */
-#line 2348 "mrbgems/mruby-compiler/core/parse.y"
+#line 2347 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_uni_op(p, cond((yyvsp[0].nd)), "!");
                     }
-#line 7577 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7576 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 53: /* expr: '!' command_call  */
-#line 2352 "mrbgems/mruby-compiler/core/parse.y"
+#line 2351 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_uni_op(p, cond((yyvsp[0].nd)), "!");
                     }
-#line 7585 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7584 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 55: /* defn_head: "'def'" fname  */
-#line 2359 "mrbgems/mruby-compiler/core/parse.y"
+#line 2358 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_def(p, (yyvsp[0].id));
                       p->cmdarg_stack = 0;
                       p->in_def++;
                       nvars_block(p);
                     }
-#line 7596 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7595 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 56: /* $@4: %empty  */
-#line 2368 "mrbgems/mruby-compiler/core/parse.y"
+#line 2367 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->lstate = EXPR_FNAME;
                     }
-#line 7604 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7603 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 57: /* defs_head: "'def'" singleton dot_or_colon $@4 fname  */
-#line 2372 "mrbgems/mruby-compiler/core/parse.y"
+#line 2371 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_sdef(p, (yyvsp[-3].nd), (yyvsp[0].id));
                       p->cmdarg_stack = 0;
@@ -7613,1054 +7612,1054 @@ yyreduce:
                       nvars_block(p);
                       p->lstate = EXPR_ENDFN; /* force for args */
                     }
-#line 7617 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7616 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 58: /* expr_value: expr  */
-#line 2383 "mrbgems/mruby-compiler/core/parse.y"
+#line 2382 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if (!(yyvsp[0].nd)) (yyval.nd) = new_nil(p);
                       else {
                         (yyval.nd) = (yyvsp[0].nd);
                       }
                     }
-#line 7628 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7627 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 62: /* block_command: block_call call_op2 operation2 command_args  */
-#line 2397 "mrbgems/mruby-compiler/core/parse.y"
+#line 2396 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), (yyvsp[-1].id), (yyvsp[0].nd), (yyvsp[-2].num));
                     }
-#line 7636 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7635 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 63: /* $@5: %empty  */
-#line 2403 "mrbgems/mruby-compiler/core/parse.y"
+#line 2402 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_nest(p);
                       nvars_nest(p);
                     }
-#line 7645 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7644 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 64: /* cmd_brace_block: "{" $@5 opt_block_param compstmt '}'  */
-#line 2410 "mrbgems/mruby-compiler/core/parse.y"
+#line 2409 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_block(p, (yyvsp[-2].nd), (yyvsp[-1].nd));
                       local_unnest(p);
                       nvars_unnest(p);
                     }
-#line 7655 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7654 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 65: /* command: operation command_args  */
-#line 2418 "mrbgems/mruby-compiler/core/parse.y"
+#line 2417 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_fcall(p, (yyvsp[-1].id), (yyvsp[0].nd));
                     }
-#line 7663 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7662 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 66: /* command: operation command_args cmd_brace_block  */
-#line 2422 "mrbgems/mruby-compiler/core/parse.y"
+#line 2421 "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 7672 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7671 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 67: /* command: primary_value call_op operation2 command_args  */
-#line 2427 "mrbgems/mruby-compiler/core/parse.y"
+#line 2426 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), (yyvsp[-1].id), (yyvsp[0].nd), (yyvsp[-2].num));
                     }
-#line 7680 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7679 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 68: /* command: primary_value call_op operation2 command_args cmd_brace_block  */
-#line 2431 "mrbgems/mruby-compiler/core/parse.y"
+#line 2430 "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 7689 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7688 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 69: /* command: primary_value "::" operation2 command_args  */
-#line 2436 "mrbgems/mruby-compiler/core/parse.y"
+#line 2435 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), (yyvsp[-1].id), (yyvsp[0].nd), tCOLON2);
                     }
-#line 7697 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7696 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 70: /* command: primary_value "::" operation2 command_args cmd_brace_block  */
-#line 2440 "mrbgems/mruby-compiler/core/parse.y"
+#line 2439 "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 7706 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7705 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 71: /* command: "'super'" command_args  */
-#line 2445 "mrbgems/mruby-compiler/core/parse.y"
+#line 2444 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_super(p, (yyvsp[0].nd));
                     }
-#line 7714 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7713 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 72: /* command: "'yield'" command_args  */
-#line 2449 "mrbgems/mruby-compiler/core/parse.y"
+#line 2448 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_yield(p, (yyvsp[0].nd));
                     }
-#line 7722 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7721 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 73: /* command: "'return'" call_args  */
-#line 2453 "mrbgems/mruby-compiler/core/parse.y"
+#line 2452 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_return(p, ret_args(p, (yyvsp[0].nd)));
                     }
-#line 7730 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7729 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 74: /* command: "'break'" call_args  */
-#line 2457 "mrbgems/mruby-compiler/core/parse.y"
+#line 2456 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_break(p, ret_args(p, (yyvsp[0].nd)));
                     }
-#line 7738 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7737 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 75: /* command: "'next'" call_args  */
-#line 2461 "mrbgems/mruby-compiler/core/parse.y"
+#line 2460 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_next(p, ret_args(p, (yyvsp[0].nd)));
                     }
-#line 7746 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7745 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 76: /* mlhs: mlhs_basic  */
-#line 2467 "mrbgems/mruby-compiler/core/parse.y"
+#line 2466 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 7754 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7753 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 77: /* mlhs: tLPAREN mlhs_inner rparen  */
-#line 2471 "mrbgems/mruby-compiler/core/parse.y"
+#line 2470 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 7762 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7761 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 79: /* mlhs_inner: tLPAREN mlhs_inner rparen  */
-#line 2478 "mrbgems/mruby-compiler/core/parse.y"
+#line 2477 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 7770 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7769 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 80: /* mlhs_basic: mlhs_list  */
-#line 2484 "mrbgems/mruby-compiler/core/parse.y"
+#line 2483 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 7778 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7777 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 81: /* mlhs_basic: mlhs_list mlhs_item  */
-#line 2488 "mrbgems/mruby-compiler/core/parse.y"
+#line 2487 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1(push((yyvsp[-1].nd),(yyvsp[0].nd)));
                     }
-#line 7786 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7785 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 82: /* mlhs_basic: mlhs_list "*" mlhs_node  */
-#line 2492 "mrbgems/mruby-compiler/core/parse.y"
+#line 2491 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list2((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 7794 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7793 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 83: /* mlhs_basic: mlhs_list "*" mlhs_node ',' mlhs_post  */
-#line 2496 "mrbgems/mruby-compiler/core/parse.y"
+#line 2495 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3((yyvsp[-4].nd), (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 7802 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7801 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 84: /* mlhs_basic: mlhs_list "*"  */
-#line 2500 "mrbgems/mruby-compiler/core/parse.y"
+#line 2499 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list2((yyvsp[-1].nd), new_nil(p));
                     }
-#line 7810 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7809 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 85: /* mlhs_basic: mlhs_list "*" ',' mlhs_post  */
-#line 2504 "mrbgems/mruby-compiler/core/parse.y"
+#line 2503 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3((yyvsp[-3].nd), new_nil(p), (yyvsp[0].nd));
                     }
-#line 7818 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7817 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 86: /* mlhs_basic: "*" mlhs_node  */
-#line 2508 "mrbgems/mruby-compiler/core/parse.y"
+#line 2507 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list2(0, (yyvsp[0].nd));
                     }
-#line 7826 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7825 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 87: /* mlhs_basic: "*" mlhs_node ',' mlhs_post  */
-#line 2512 "mrbgems/mruby-compiler/core/parse.y"
+#line 2511 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3(0, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 7834 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7833 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 88: /* mlhs_basic: "*"  */
-#line 2516 "mrbgems/mruby-compiler/core/parse.y"
+#line 2515 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list2(0, new_nil(p));
                     }
-#line 7842 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7841 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 89: /* mlhs_basic: "*" ',' mlhs_post  */
-#line 2520 "mrbgems/mruby-compiler/core/parse.y"
+#line 2519 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3(0, new_nil(p), (yyvsp[0].nd));
                     }
-#line 7850 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7849 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 91: /* mlhs_item: tLPAREN mlhs_inner rparen  */
-#line 2527 "mrbgems/mruby-compiler/core/parse.y"
+#line 2526 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_masgn(p, (yyvsp[-1].nd), NULL);
                     }
-#line 7858 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7857 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 92: /* mlhs_list: mlhs_item ','  */
-#line 2533 "mrbgems/mruby-compiler/core/parse.y"
+#line 2532 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1((yyvsp[-1].nd));
                     }
-#line 7866 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7865 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 93: /* mlhs_list: mlhs_list mlhs_item ','  */
-#line 2537 "mrbgems/mruby-compiler/core/parse.y"
+#line 2536 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[-1].nd));
                     }
-#line 7874 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7873 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 94: /* mlhs_post: mlhs_item  */
-#line 2543 "mrbgems/mruby-compiler/core/parse.y"
+#line 2542 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 7882 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7881 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 95: /* mlhs_post: mlhs_list mlhs_item  */
-#line 2547 "mrbgems/mruby-compiler/core/parse.y"
+#line 2546 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 7890 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7889 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 96: /* mlhs_node: variable  */
-#line 2553 "mrbgems/mruby-compiler/core/parse.y"
+#line 2552 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       assignable(p, (yyvsp[0].nd));
                     }
-#line 7898 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7897 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 97: /* mlhs_node: primary_value '[' opt_call_args ']'  */
-#line 2557 "mrbgems/mruby-compiler/core/parse.y"
+#line 2556 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), intern_op(aref), (yyvsp[-1].nd), '.');
                     }
-#line 7906 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7905 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 98: /* mlhs_node: primary_value call_op "local variable or method"  */
-#line 2561 "mrbgems/mruby-compiler/core/parse.y"
+#line 2560 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-2].nd), (yyvsp[0].id), 0, (yyvsp[-1].num));
                     }
-#line 7914 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7913 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 99: /* mlhs_node: primary_value "::" "local variable or method"  */
-#line 2565 "mrbgems/mruby-compiler/core/parse.y"
+#line 2564 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-2].nd), (yyvsp[0].id), 0, tCOLON2);
                     }
-#line 7922 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7921 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 100: /* mlhs_node: primary_value call_op "constant"  */
-#line 2569 "mrbgems/mruby-compiler/core/parse.y"
+#line 2568 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-2].nd), (yyvsp[0].id), 0, (yyvsp[-1].num));
                     }
-#line 7930 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7929 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 101: /* mlhs_node: primary_value "::" "constant"  */
-#line 2573 "mrbgems/mruby-compiler/core/parse.y"
+#line 2572 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if (p->in_def || p->in_single)
                         yyerror(&(yylsp[-2]), p, "dynamic constant assignment");
                       (yyval.nd) = new_colon2(p, (yyvsp[-2].nd), (yyvsp[0].id));
                     }
-#line 7940 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7939 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 102: /* mlhs_node: tCOLON3 "constant"  */
-#line 2579 "mrbgems/mruby-compiler/core/parse.y"
+#line 2578 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if (p->in_def || p->in_single)
                         yyerror(&(yylsp[-1]), p, "dynamic constant assignment");
                       (yyval.nd) = new_colon3(p, (yyvsp[0].id));
                     }
-#line 7950 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7949 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 103: /* mlhs_node: backref  */
-#line 2585 "mrbgems/mruby-compiler/core/parse.y"
+#line 2584 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       backref_error(p, (yyvsp[0].nd));
                       (yyval.nd) = 0;
                     }
-#line 7959 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7958 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 104: /* lhs: variable  */
-#line 2592 "mrbgems/mruby-compiler/core/parse.y"
+#line 2591 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       assignable(p, (yyvsp[0].nd));
                     }
-#line 7967 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7966 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 105: /* lhs: primary_value '[' opt_call_args ']'  */
-#line 2596 "mrbgems/mruby-compiler/core/parse.y"
+#line 2595 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), intern_op(aref), (yyvsp[-1].nd), '.');
                     }
-#line 7975 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7974 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 106: /* lhs: primary_value call_op "local variable or method"  */
-#line 2600 "mrbgems/mruby-compiler/core/parse.y"
+#line 2599 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-2].nd), (yyvsp[0].id), 0, (yyvsp[-1].num));
                     }
-#line 7983 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7982 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 107: /* lhs: primary_value "::" "local variable or method"  */
-#line 2604 "mrbgems/mruby-compiler/core/parse.y"
+#line 2603 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-2].nd), (yyvsp[0].id), 0, tCOLON2);
                     }
-#line 7991 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7990 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 108: /* lhs: primary_value call_op "constant"  */
-#line 2608 "mrbgems/mruby-compiler/core/parse.y"
+#line 2607 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-2].nd), (yyvsp[0].id), 0, (yyvsp[-1].num));
                     }
-#line 7999 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7998 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 109: /* lhs: primary_value "::" "constant"  */
-#line 2612 "mrbgems/mruby-compiler/core/parse.y"
+#line 2611 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if (p->in_def || p->in_single)
                         yyerror(&(yylsp[-2]), p, "dynamic constant assignment");
                       (yyval.nd) = new_colon2(p, (yyvsp[-2].nd), (yyvsp[0].id));
                     }
-#line 8009 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8008 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 110: /* lhs: tCOLON3 "constant"  */
-#line 2618 "mrbgems/mruby-compiler/core/parse.y"
+#line 2617 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if (p->in_def || p->in_single)
                         yyerror(&(yylsp[-1]), p, "dynamic constant assignment");
                       (yyval.nd) = new_colon3(p, (yyvsp[0].id));
                     }
-#line 8019 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8018 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 111: /* lhs: backref  */
-#line 2624 "mrbgems/mruby-compiler/core/parse.y"
+#line 2623 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       backref_error(p, (yyvsp[0].nd));
                       (yyval.nd) = 0;
                     }
-#line 8028 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8027 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 112: /* lhs: "numbered parameter"  */
-#line 2629 "mrbgems/mruby-compiler/core/parse.y"
+#line 2628 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[0]), p, "can't assign to numbered parameter");
                     }
-#line 8036 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8035 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 113: /* cname: "local variable or method"  */
-#line 2635 "mrbgems/mruby-compiler/core/parse.y"
+#line 2634 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[0]), p, "class/module name must be CONSTANT");
                     }
-#line 8044 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8043 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 115: /* cpath: tCOLON3 cname  */
-#line 2642 "mrbgems/mruby-compiler/core/parse.y"
+#line 2641 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = cons(int_to_node(1), sym_to_node((yyvsp[0].id)));
                     }
-#line 8052 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8051 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 116: /* cpath: cname  */
-#line 2646 "mrbgems/mruby-compiler/core/parse.y"
+#line 2645 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = cons(int_to_node(0), sym_to_node((yyvsp[0].id)));
                     }
-#line 8060 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8059 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 117: /* cpath: primary_value "::" cname  */
-#line 2650 "mrbgems/mruby-compiler/core/parse.y"
+#line 2649 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       void_expr_error(p, (yyvsp[-2].nd));
                       (yyval.nd) = cons((yyvsp[-2].nd), sym_to_node((yyvsp[0].id)));
                     }
-#line 8069 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8068 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 121: /* fname: op  */
-#line 2660 "mrbgems/mruby-compiler/core/parse.y"
+#line 2659 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->lstate = EXPR_ENDFN;
                       (yyval.id) = (yyvsp[0].id);
                     }
-#line 8078 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8077 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 122: /* fname: reswords  */
-#line 2665 "mrbgems/mruby-compiler/core/parse.y"
+#line 2664 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->lstate = EXPR_ENDFN;
                       (yyval.id) = (yyvsp[0].id);
                     }
-#line 8087 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8086 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 125: /* undef_list: fsym  */
-#line 2676 "mrbgems/mruby-compiler/core/parse.y"
+#line 2675 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = cons(sym_to_node((yyvsp[0].id)), 0);
                     }
-#line 8095 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8094 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 126: /* $@6: %empty  */
-#line 2679 "mrbgems/mruby-compiler/core/parse.y"
+#line 2678 "mrbgems/mruby-compiler/core/parse.y"
                                  {p->lstate = EXPR_FNAME;}
-#line 8101 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8100 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 127: /* undef_list: undef_list ',' $@6 fsym  */
-#line 2680 "mrbgems/mruby-compiler/core/parse.y"
+#line 2679 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-3].nd), sym_to_node((yyvsp[0].id)));
                     }
-#line 8109 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8108 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 128: /* op: '|'  */
-#line 2685 "mrbgems/mruby-compiler/core/parse.y"
+#line 2684 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(or);     }
-#line 8115 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8114 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 129: /* op: '^'  */
-#line 2686 "mrbgems/mruby-compiler/core/parse.y"
+#line 2685 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(xor);    }
-#line 8121 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8120 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 130: /* op: '&'  */
-#line 2687 "mrbgems/mruby-compiler/core/parse.y"
+#line 2686 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(and);    }
-#line 8127 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8126 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 131: /* op: "<=>"  */
-#line 2688 "mrbgems/mruby-compiler/core/parse.y"
+#line 2687 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(cmp);    }
-#line 8133 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8132 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 132: /* op: "=="  */
-#line 2689 "mrbgems/mruby-compiler/core/parse.y"
+#line 2688 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(eq);     }
-#line 8139 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8138 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 133: /* op: "==="  */
-#line 2690 "mrbgems/mruby-compiler/core/parse.y"
+#line 2689 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(eqq);    }
-#line 8145 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8144 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 134: /* op: "=~"  */
-#line 2691 "mrbgems/mruby-compiler/core/parse.y"
+#line 2690 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(match);  }
-#line 8151 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8150 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 135: /* op: "!~"  */
-#line 2692 "mrbgems/mruby-compiler/core/parse.y"
+#line 2691 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(nmatch); }
-#line 8157 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8156 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 136: /* op: '>'  */
-#line 2693 "mrbgems/mruby-compiler/core/parse.y"
+#line 2692 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(gt);     }
-#line 8163 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8162 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 137: /* op: ">="  */
-#line 2694 "mrbgems/mruby-compiler/core/parse.y"
+#line 2693 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(ge);     }
-#line 8169 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8168 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 138: /* op: '<'  */
-#line 2695 "mrbgems/mruby-compiler/core/parse.y"
+#line 2694 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(lt);     }
-#line 8175 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8174 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 139: /* op: "<="  */
-#line 2696 "mrbgems/mruby-compiler/core/parse.y"
+#line 2695 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(le);     }
-#line 8181 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8180 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 140: /* op: "!="  */
-#line 2697 "mrbgems/mruby-compiler/core/parse.y"
+#line 2696 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(neq);    }
-#line 8187 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8186 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 141: /* op: "<<"  */
-#line 2698 "mrbgems/mruby-compiler/core/parse.y"
+#line 2697 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(lshift); }
-#line 8193 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8192 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 142: /* op: ">>"  */
-#line 2699 "mrbgems/mruby-compiler/core/parse.y"
+#line 2698 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(rshift); }
-#line 8199 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8198 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 143: /* op: '+'  */
-#line 2700 "mrbgems/mruby-compiler/core/parse.y"
+#line 2699 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(add);    }
-#line 8205 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8204 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 144: /* op: '-'  */
-#line 2701 "mrbgems/mruby-compiler/core/parse.y"
+#line 2700 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(sub);    }
-#line 8211 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8210 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 145: /* op: '*'  */
-#line 2702 "mrbgems/mruby-compiler/core/parse.y"
+#line 2701 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(mul);    }
-#line 8217 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8216 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 146: /* op: "*"  */
-#line 2703 "mrbgems/mruby-compiler/core/parse.y"
+#line 2702 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(mul);    }
-#line 8223 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8222 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 147: /* op: '/'  */
-#line 2704 "mrbgems/mruby-compiler/core/parse.y"
+#line 2703 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(div);    }
-#line 8229 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8228 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 148: /* op: '%'  */
-#line 2705 "mrbgems/mruby-compiler/core/parse.y"
+#line 2704 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(mod);    }
-#line 8235 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8234 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 149: /* op: tPOW  */
-#line 2706 "mrbgems/mruby-compiler/core/parse.y"
+#line 2705 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(pow);    }
-#line 8241 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8240 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 150: /* op: "**"  */
-#line 2707 "mrbgems/mruby-compiler/core/parse.y"
+#line 2706 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(pow);    }
-#line 8247 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8246 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 151: /* op: '!'  */
-#line 2708 "mrbgems/mruby-compiler/core/parse.y"
+#line 2707 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(not);    }
-#line 8253 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8252 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 152: /* op: '~'  */
-#line 2709 "mrbgems/mruby-compiler/core/parse.y"
+#line 2708 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(neg);    }
-#line 8259 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8258 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 153: /* op: "unary plus"  */
-#line 2710 "mrbgems/mruby-compiler/core/parse.y"
+#line 2709 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(plus);   }
-#line 8265 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8264 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 154: /* op: "unary minus"  */
-#line 2711 "mrbgems/mruby-compiler/core/parse.y"
+#line 2710 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(minus);  }
-#line 8271 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8270 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 155: /* op: tAREF  */
-#line 2712 "mrbgems/mruby-compiler/core/parse.y"
+#line 2711 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(aref);   }
-#line 8277 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8276 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 156: /* op: tASET  */
-#line 2713 "mrbgems/mruby-compiler/core/parse.y"
+#line 2712 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(aset);   }
-#line 8283 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8282 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 157: /* op: '`'  */
-#line 2714 "mrbgems/mruby-compiler/core/parse.y"
+#line 2713 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(tick);   }
-#line 8289 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8288 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 198: /* arg: lhs '=' arg_rhs  */
-#line 2732 "mrbgems/mruby-compiler/core/parse.y"
+#line 2731 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_asgn(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 8297 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8296 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 199: /* arg: var_lhs tOP_ASGN arg_rhs  */
-#line 2736 "mrbgems/mruby-compiler/core/parse.y"
+#line 2735 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_op_asgn(p, (yyvsp[-2].nd), (yyvsp[-1].id), (yyvsp[0].nd));
                     }
-#line 8305 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8304 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 200: /* arg: primary_value '[' opt_call_args ']' tOP_ASGN arg_rhs  */
-#line 2740 "mrbgems/mruby-compiler/core/parse.y"
+#line 2739 "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 8313 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8312 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 201: /* arg: primary_value call_op "local variable or method" tOP_ASGN arg_rhs  */
-#line 2744 "mrbgems/mruby-compiler/core/parse.y"
+#line 2743 "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 8321 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8320 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 202: /* arg: primary_value call_op "constant" tOP_ASGN arg_rhs  */
-#line 2748 "mrbgems/mruby-compiler/core/parse.y"
+#line 2747 "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 8329 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8328 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 203: /* arg: primary_value "::" "local variable or method" tOP_ASGN arg_rhs  */
-#line 2752 "mrbgems/mruby-compiler/core/parse.y"
+#line 2751 "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 8337 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8336 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 204: /* arg: primary_value "::" "constant" tOP_ASGN arg_rhs  */
-#line 2756 "mrbgems/mruby-compiler/core/parse.y"
+#line 2755 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[-4]), p, "constant re-assignment");
                       (yyval.nd) = new_stmts(p, 0);
                     }
-#line 8346 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8345 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 205: /* arg: tCOLON3 "constant" tOP_ASGN arg_rhs  */
-#line 2761 "mrbgems/mruby-compiler/core/parse.y"
+#line 2760 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[-3]), p, "constant re-assignment");
                       (yyval.nd) = new_stmts(p, 0);
                     }
-#line 8355 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8354 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 206: /* arg: backref tOP_ASGN arg_rhs  */
-#line 2766 "mrbgems/mruby-compiler/core/parse.y"
+#line 2765 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       backref_error(p, (yyvsp[-2].nd));
                       (yyval.nd) = new_stmts(p, 0);
                     }
-#line 8364 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8363 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 207: /* arg: arg ".." arg  */
-#line 2771 "mrbgems/mruby-compiler/core/parse.y"
+#line 2770 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_dot2(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 8372 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8371 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 208: /* arg: arg ".."  */
-#line 2775 "mrbgems/mruby-compiler/core/parse.y"
+#line 2774 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_dot2(p, (yyvsp[-1].nd), new_nil(p));
                     }
-#line 8380 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8379 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 209: /* arg: tBDOT2 arg  */
-#line 2779 "mrbgems/mruby-compiler/core/parse.y"
+#line 2778 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_dot2(p, new_nil(p), (yyvsp[0].nd));
                     }
-#line 8388 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8387 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 210: /* arg: arg "..." arg  */
-#line 2783 "mrbgems/mruby-compiler/core/parse.y"
+#line 2782 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_dot3(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 8396 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8395 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 211: /* arg: arg "..."  */
-#line 2787 "mrbgems/mruby-compiler/core/parse.y"
+#line 2786 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_dot3(p, (yyvsp[-1].nd), new_nil(p));
                     }
-#line 8404 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8403 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 212: /* arg: tBDOT3 arg  */
-#line 2791 "mrbgems/mruby-compiler/core/parse.y"
+#line 2790 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_dot3(p, new_nil(p), (yyvsp[0].nd));
                     }
-#line 8412 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8411 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 213: /* arg: arg '+' arg  */
-#line 2795 "mrbgems/mruby-compiler/core/parse.y"
+#line 2794 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "+", (yyvsp[0].nd));
                     }
-#line 8420 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8419 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 214: /* arg: arg '-' arg  */
-#line 2799 "mrbgems/mruby-compiler/core/parse.y"
+#line 2798 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "-", (yyvsp[0].nd));
                     }
-#line 8428 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8427 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 215: /* arg: arg '*' arg  */
-#line 2803 "mrbgems/mruby-compiler/core/parse.y"
+#line 2802 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "*", (yyvsp[0].nd));
                     }
-#line 8436 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8435 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 216: /* arg: arg '/' arg  */
-#line 2807 "mrbgems/mruby-compiler/core/parse.y"
+#line 2806 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "/", (yyvsp[0].nd));
                     }
-#line 8444 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8443 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 217: /* arg: arg '%' arg  */
-#line 2811 "mrbgems/mruby-compiler/core/parse.y"
+#line 2810 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "%", (yyvsp[0].nd));
                     }
-#line 8452 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8451 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 218: /* arg: arg tPOW arg  */
-#line 2815 "mrbgems/mruby-compiler/core/parse.y"
+#line 2814 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "**", (yyvsp[0].nd));
                     }
-#line 8460 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8459 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 219: /* arg: tUMINUS_NUM "integer literal" tPOW arg  */
-#line 2819 "mrbgems/mruby-compiler/core/parse.y"
+#line 2818 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_negate(p, call_bin_op(p, (yyvsp[-2].nd), "**", (yyvsp[0].nd)));
                     }
-#line 8468 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8467 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 220: /* arg: tUMINUS_NUM "float literal" tPOW arg  */
-#line 2823 "mrbgems/mruby-compiler/core/parse.y"
+#line 2822 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_negate(p, call_bin_op(p, (yyvsp[-2].nd), "**", (yyvsp[0].nd)));
                     }
-#line 8476 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8475 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 221: /* arg: "unary plus" arg  */
-#line 2827 "mrbgems/mruby-compiler/core/parse.y"
+#line 2826 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_uni_op(p, (yyvsp[0].nd), "+@");
                     }
-#line 8484 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8483 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 222: /* arg: "unary minus" arg  */
-#line 2831 "mrbgems/mruby-compiler/core/parse.y"
+#line 2830 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_negate(p, (yyvsp[0].nd));
                     }
-#line 8492 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8491 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 223: /* arg: arg '|' arg  */
-#line 2835 "mrbgems/mruby-compiler/core/parse.y"
+#line 2834 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "|", (yyvsp[0].nd));
                     }
-#line 8500 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8499 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 224: /* arg: arg '^' arg  */
-#line 2839 "mrbgems/mruby-compiler/core/parse.y"
+#line 2838 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "^", (yyvsp[0].nd));
                     }
-#line 8508 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8507 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 225: /* arg: arg '&' arg  */
-#line 2843 "mrbgems/mruby-compiler/core/parse.y"
+#line 2842 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "&", (yyvsp[0].nd));
                     }
-#line 8516 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8515 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 226: /* arg: arg "<=>" arg  */
-#line 2847 "mrbgems/mruby-compiler/core/parse.y"
+#line 2846 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "<=>", (yyvsp[0].nd));
                     }
-#line 8524 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8523 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 227: /* arg: arg '>' arg  */
-#line 2851 "mrbgems/mruby-compiler/core/parse.y"
+#line 2850 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), ">", (yyvsp[0].nd));
                     }
-#line 8532 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8531 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 228: /* arg: arg ">=" arg  */
-#line 2855 "mrbgems/mruby-compiler/core/parse.y"
+#line 2854 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), ">=", (yyvsp[0].nd));
                     }
-#line 8540 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8539 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 229: /* arg: arg '<' arg  */
-#line 2859 "mrbgems/mruby-compiler/core/parse.y"
+#line 2858 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "<", (yyvsp[0].nd));
                     }
-#line 8548 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8547 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 230: /* arg: arg "<=" arg  */
-#line 2863 "mrbgems/mruby-compiler/core/parse.y"
+#line 2862 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "<=", (yyvsp[0].nd));
                     }
-#line 8556 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8555 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 231: /* arg: arg "==" arg  */
-#line 2867 "mrbgems/mruby-compiler/core/parse.y"
+#line 2866 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "==", (yyvsp[0].nd));
                     }
-#line 8564 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8563 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 232: /* arg: arg "===" arg  */
-#line 2871 "mrbgems/mruby-compiler/core/parse.y"
+#line 2870 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "===", (yyvsp[0].nd));
                     }
-#line 8572 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8571 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 233: /* arg: arg "!=" arg  */
-#line 2875 "mrbgems/mruby-compiler/core/parse.y"
+#line 2874 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "!=", (yyvsp[0].nd));
                     }
-#line 8580 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8579 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 234: /* arg: arg "=~" arg  */
-#line 2879 "mrbgems/mruby-compiler/core/parse.y"
+#line 2878 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "=~", (yyvsp[0].nd));
                     }
-#line 8588 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8587 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 235: /* arg: arg "!~" arg  */
-#line 2883 "mrbgems/mruby-compiler/core/parse.y"
+#line 2882 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "!~", (yyvsp[0].nd));
                     }
-#line 8596 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8595 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 236: /* arg: '!' arg  */
-#line 2887 "mrbgems/mruby-compiler/core/parse.y"
+#line 2886 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_uni_op(p, cond((yyvsp[0].nd)), "!");
                     }
-#line 8604 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8603 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 237: /* arg: '~' arg  */
-#line 2891 "mrbgems/mruby-compiler/core/parse.y"
+#line 2890 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_uni_op(p, cond((yyvsp[0].nd)), "~");
                     }
-#line 8612 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8611 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 238: /* arg: arg "<<" arg  */
-#line 2895 "mrbgems/mruby-compiler/core/parse.y"
+#line 2894 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "<<", (yyvsp[0].nd));
                     }
-#line 8620 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8619 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 239: /* arg: arg ">>" arg  */
-#line 2899 "mrbgems/mruby-compiler/core/parse.y"
+#line 2898 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), ">>", (yyvsp[0].nd));
                     }
-#line 8628 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8627 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 240: /* arg: arg "&&" arg  */
-#line 2903 "mrbgems/mruby-compiler/core/parse.y"
+#line 2902 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_and(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 8636 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8635 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 241: /* arg: arg "||" arg  */
-#line 2907 "mrbgems/mruby-compiler/core/parse.y"
+#line 2906 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_or(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 8644 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8643 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 242: /* arg: arg '?' arg opt_nl ':' arg  */
-#line 2911 "mrbgems/mruby-compiler/core/parse.y"
+#line 2910 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_if(p, cond((yyvsp[-5].nd)), (yyvsp[-3].nd), (yyvsp[0].nd));
                     }
-#line 8652 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8651 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 243: /* arg: arg '?' arg opt_nl "label" arg  */
-#line 2915 "mrbgems/mruby-compiler/core/parse.y"
+#line 2914 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_if(p, cond((yyvsp[-5].nd)), (yyvsp[-3].nd), (yyvsp[0].nd));
                     }
-#line 8660 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8659 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 244: /* arg: defn_head f_opt_arglist_paren '=' arg  */
-#line 2919 "mrbgems/mruby-compiler/core/parse.y"
+#line 2918 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-3].nd);
                       endless_method_name(p, (yyvsp[-3].nd));
@@ -8669,11 +8668,11 @@ yyreduce:
                       nvars_unnest(p);
                       p->in_def--;
                     }
-#line 8673 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8672 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 245: /* arg: defn_head f_opt_arglist_paren '=' arg "'rescue' modifier" arg  */
-#line 2928 "mrbgems/mruby-compiler/core/parse.y"
+#line 2927 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-5].nd);
                       endless_method_name(p, (yyvsp[-5].nd));
@@ -8682,11 +8681,11 @@ yyreduce:
                       nvars_unnest(p);
                       p->in_def--;
                     }
-#line 8686 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8685 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 246: /* arg: defs_head f_opt_arglist_paren '=' arg  */
-#line 2937 "mrbgems/mruby-compiler/core/parse.y"
+#line 2936 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-3].nd);
                       void_expr_error(p, (yyvsp[0].nd));
@@ -8695,11 +8694,11 @@ yyreduce:
                       p->in_def--;
                       p->in_single--;
                     }
-#line 8699 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8698 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 247: /* arg: defs_head f_opt_arglist_paren '=' arg "'rescue' modifier" arg  */
-#line 2946 "mrbgems/mruby-compiler/core/parse.y"
+#line 2945 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-5].nd);
                       void_expr_error(p, (yyvsp[-2].nd));
@@ -8708,68 +8707,68 @@ yyreduce:
                       p->in_def--;
                       p->in_single--;
                     }
-#line 8712 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8711 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 248: /* arg: primary  */
-#line 2955 "mrbgems/mruby-compiler/core/parse.y"
+#line 2954 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 8720 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8719 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 250: /* aref_args: args trailer  */
-#line 2962 "mrbgems/mruby-compiler/core/parse.y"
+#line 2961 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 8728 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8727 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 251: /* aref_args: args comma assocs trailer  */
-#line 2966 "mrbgems/mruby-compiler/core/parse.y"
+#line 2965 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-3].nd), new_hash(p, (yyvsp[-1].nd)));
                     }
-#line 8736 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8735 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 252: /* aref_args: assocs trailer  */
-#line 2970 "mrbgems/mruby-compiler/core/parse.y"
+#line 2969 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = cons(new_hash(p, (yyvsp[-1].nd)), 0);
                     }
-#line 8744 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8743 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 253: /* arg_rhs: arg  */
-#line 2976 "mrbgems/mruby-compiler/core/parse.y"
+#line 2975 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 8752 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8751 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 254: /* arg_rhs: arg "'rescue' modifier" arg  */
-#line 2980 "mrbgems/mruby-compiler/core/parse.y"
+#line 2979 "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 8761 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8760 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 255: /* paren_args: '(' opt_call_args ')'  */
-#line 2987 "mrbgems/mruby-compiler/core/parse.y"
+#line 2986 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 8769 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8768 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 256: /* paren_args: '(' args comma tBDOT3 rparen  */
-#line 2991 "mrbgems/mruby-compiler/core/parse.y"
+#line 2990 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       mrb_sym r = intern_op(mul);
                       mrb_sym k = intern_op(pow);
@@ -8778,11 +8777,11 @@ yyreduce:
                                         list1(cons(new_kw_rest_args(p, 0), new_lvar(p, k))),
                                         new_block_arg(p, new_lvar(p, b)));
                     }
-#line 8782 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8781 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 257: /* paren_args: '(' tBDOT3 rparen  */
-#line 3000 "mrbgems/mruby-compiler/core/parse.y"
+#line 2999 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       mrb_sym r = intern_op(mul);
                       mrb_sym k = intern_op(pow);
@@ -8797,390 +8796,390 @@ yyreduce:
                         (yyval.nd) = 0;
                       }
                     }
-#line 8801 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8800 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 262: /* opt_call_args: args comma  */
-#line 3023 "mrbgems/mruby-compiler/core/parse.y"
+#line 3022 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_callargs(p,(yyvsp[-1].nd),0,0);
                     }
-#line 8809 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8808 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 263: /* opt_call_args: args comma assocs comma  */
-#line 3027 "mrbgems/mruby-compiler/core/parse.y"
+#line 3026 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_callargs(p,(yyvsp[-3].nd),(yyvsp[-1].nd),0);
                     }
-#line 8817 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8816 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 264: /* opt_call_args: assocs comma  */
-#line 3031 "mrbgems/mruby-compiler/core/parse.y"
+#line 3030 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_callargs(p,0,(yyvsp[-1].nd),0);
                     }
-#line 8825 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8824 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 265: /* call_args: command  */
-#line 3037 "mrbgems/mruby-compiler/core/parse.y"
+#line 3036 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       void_expr_error(p, (yyvsp[0].nd));
                       (yyval.nd) = new_callargs(p, list1((yyvsp[0].nd)), 0, 0);
                     }
-#line 8834 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8833 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 266: /* call_args: args opt_block_arg  */
-#line 3042 "mrbgems/mruby-compiler/core/parse.y"
+#line 3041 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_callargs(p, (yyvsp[-1].nd), 0, (yyvsp[0].nd));
                     }
-#line 8842 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8841 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 267: /* call_args: assocs opt_block_arg  */
-#line 3046 "mrbgems/mruby-compiler/core/parse.y"
+#line 3045 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_callargs(p, 0, (yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 8850 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8849 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 268: /* call_args: args comma assocs opt_block_arg  */
-#line 3050 "mrbgems/mruby-compiler/core/parse.y"
+#line 3049 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_callargs(p, (yyvsp[-3].nd), (yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 8858 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8857 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 269: /* call_args: block_arg  */
-#line 3054 "mrbgems/mruby-compiler/core/parse.y"
+#line 3053 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_callargs(p, 0, 0, (yyvsp[0].nd));
                     }
-#line 8866 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8865 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 270: /* @7: %empty  */
-#line 3059 "mrbgems/mruby-compiler/core/parse.y"
+#line 3058 "mrbgems/mruby-compiler/core/parse.y"
                    {
                       (yyval.stack) = p->cmdarg_stack;
                       CMDARG_PUSH(1);
                     }
-#line 8875 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8874 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 271: /* command_args: @7 call_args  */
-#line 3064 "mrbgems/mruby-compiler/core/parse.y"
+#line 3063 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->cmdarg_stack = (yyvsp[-1].stack);
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 8884 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8883 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 272: /* block_arg: "&" arg  */
-#line 3071 "mrbgems/mruby-compiler/core/parse.y"
+#line 3070 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_block_arg(p, (yyvsp[0].nd));
                     }
-#line 8892 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8891 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 273: /* block_arg: "&"  */
-#line 3075 "mrbgems/mruby-compiler/core/parse.y"
+#line 3074 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_block_arg(p, 0);
                     }
-#line 8900 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8899 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 274: /* opt_block_arg: comma block_arg  */
-#line 3081 "mrbgems/mruby-compiler/core/parse.y"
+#line 3080 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 8908 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8907 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 275: /* opt_block_arg: none  */
-#line 3085 "mrbgems/mruby-compiler/core/parse.y"
+#line 3084 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = 0;
                     }
-#line 8916 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8915 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 277: /* args: arg  */
-#line 3094 "mrbgems/mruby-compiler/core/parse.y"
+#line 3093 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       void_expr_error(p, (yyvsp[0].nd));
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 8925 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8924 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 278: /* args: "*"  */
-#line 3099 "mrbgems/mruby-compiler/core/parse.y"
+#line 3098 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1(new_splat(p, new_lvar(p, intern_op(mul))));
                     }
-#line 8933 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8932 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 279: /* args: "*" arg  */
-#line 3103 "mrbgems/mruby-compiler/core/parse.y"
+#line 3102 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1(new_splat(p, (yyvsp[0].nd)));
                     }
-#line 8941 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8940 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 280: /* args: args comma arg  */
-#line 3107 "mrbgems/mruby-compiler/core/parse.y"
+#line 3106 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       void_expr_error(p, (yyvsp[0].nd));
                       (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 8950 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8949 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 281: /* args: args comma "*"  */
-#line 3112 "mrbgems/mruby-compiler/core/parse.y"
+#line 3111 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-2].nd), new_splat(p, new_lvar(p, intern_op(mul))));
                     }
-#line 8958 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8957 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 282: /* args: args comma "*" arg  */
-#line 3116 "mrbgems/mruby-compiler/core/parse.y"
+#line 3115 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-3].nd), new_splat(p, (yyvsp[0].nd)));
                     }
-#line 8966 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8965 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 283: /* mrhs: args comma arg  */
-#line 3122 "mrbgems/mruby-compiler/core/parse.y"
+#line 3121 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       void_expr_error(p, (yyvsp[0].nd));
                       (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 8975 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8974 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 284: /* mrhs: args comma "*" arg  */
-#line 3127 "mrbgems/mruby-compiler/core/parse.y"
+#line 3126 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-3].nd), new_splat(p, (yyvsp[0].nd)));
                     }
-#line 8983 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8982 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 285: /* mrhs: "*" arg  */
-#line 3131 "mrbgems/mruby-compiler/core/parse.y"
+#line 3130 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1(new_splat(p, (yyvsp[0].nd)));
                     }
-#line 8991 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8990 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 287: /* primary: string  */
-#line 3138 "mrbgems/mruby-compiler/core/parse.y"
+#line 3137 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_str(p, (yyvsp[0].nd));
                     }
-#line 8999 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8998 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 288: /* primary: xstring  */
-#line 3142 "mrbgems/mruby-compiler/core/parse.y"
+#line 3141 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_xstr(p, (yyvsp[0].nd));
                     }
-#line 9007 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9006 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 293: /* primary: "method"  */
-#line 3150 "mrbgems/mruby-compiler/core/parse.y"
+#line 3149 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_fcall(p, (yyvsp[0].id), 0);
                     }
-#line 9015 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9014 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 294: /* @8: %empty  */
-#line 3154 "mrbgems/mruby-compiler/core/parse.y"
+#line 3153 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.stack) = p->cmdarg_stack;
                       p->cmdarg_stack = 0;
                     }
-#line 9024 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9023 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 295: /* primary: "'begin'" @8 bodystmt "'end'"  */
-#line 3160 "mrbgems/mruby-compiler/core/parse.y"
+#line 3159 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->cmdarg_stack = (yyvsp[-2].stack);
                       (yyval.nd) = new_begin(p, (yyvsp[-1].nd));
                     }
-#line 9033 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9032 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 296: /* @9: %empty  */
-#line 3165 "mrbgems/mruby-compiler/core/parse.y"
+#line 3164 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.stack) = p->cmdarg_stack;
                       p->cmdarg_stack = 0;
                     }
-#line 9042 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9041 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 297: /* $@10: %empty  */
-#line 3169 "mrbgems/mruby-compiler/core/parse.y"
+#line 3168 "mrbgems/mruby-compiler/core/parse.y"
                        {p->lstate = EXPR_ENDARG;}
-#line 9048 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9047 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 298: /* primary: "(" @9 stmt $@10 rparen  */
-#line 3170 "mrbgems/mruby-compiler/core/parse.y"
+#line 3169 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->cmdarg_stack = (yyvsp[-3].stack);
                       (yyval.nd) = (yyvsp[-2].nd);
                     }
-#line 9057 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9056 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 299: /* $@11: %empty  */
-#line 3174 "mrbgems/mruby-compiler/core/parse.y"
+#line 3173 "mrbgems/mruby-compiler/core/parse.y"
                               {p->lstate = EXPR_ENDARG;}
-#line 9063 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9062 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 300: /* primary: "(" $@11 rparen  */
-#line 3175 "mrbgems/mruby-compiler/core/parse.y"
+#line 3174 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_nil(p);
                     }
-#line 9071 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9070 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 301: /* primary: tLPAREN compstmt ')'  */
-#line 3179 "mrbgems/mruby-compiler/core/parse.y"
+#line 3178 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 9079 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9078 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 302: /* primary: primary_value "::" "constant"  */
-#line 3183 "mrbgems/mruby-compiler/core/parse.y"
+#line 3182 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_colon2(p, (yyvsp[-2].nd), (yyvsp[0].id));
                     }
-#line 9087 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9086 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 303: /* primary: tCOLON3 "constant"  */
-#line 3187 "mrbgems/mruby-compiler/core/parse.y"
+#line 3186 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_colon3(p, (yyvsp[0].id));
                     }
-#line 9095 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9094 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 304: /* primary: "[" aref_args ']'  */
-#line 3191 "mrbgems/mruby-compiler/core/parse.y"
+#line 3190 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_array(p, (yyvsp[-1].nd));
                     }
-#line 9103 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9102 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 305: /* primary: tLBRACE assoc_list '}'  */
-#line 3195 "mrbgems/mruby-compiler/core/parse.y"
+#line 3194 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_hash(p, (yyvsp[-1].nd));
                     }
-#line 9111 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9110 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 306: /* primary: "'return'"  */
-#line 3199 "mrbgems/mruby-compiler/core/parse.y"
+#line 3198 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_return(p, 0);
                     }
-#line 9119 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9118 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 307: /* primary: "'yield'" opt_paren_args  */
-#line 3203 "mrbgems/mruby-compiler/core/parse.y"
+#line 3202 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_yield(p, (yyvsp[0].nd));
                     }
-#line 9127 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9126 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 308: /* primary: "'not'" '(' expr rparen  */
-#line 3207 "mrbgems/mruby-compiler/core/parse.y"
+#line 3206 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_uni_op(p, cond((yyvsp[-1].nd)), "!");
                     }
-#line 9135 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9134 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 309: /* primary: "'not'" '(' rparen  */
-#line 3211 "mrbgems/mruby-compiler/core/parse.y"
+#line 3210 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_uni_op(p, new_nil(p), "!");
                     }
-#line 9143 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9142 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 310: /* primary: operation brace_block  */
-#line 3215 "mrbgems/mruby-compiler/core/parse.y"
+#line 3214 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_fcall(p, (yyvsp[-1].id), new_callargs(p, 0, 0, (yyvsp[0].nd)));
                     }
-#line 9151 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9150 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 312: /* primary: method_call brace_block  */
-#line 3220 "mrbgems/mruby-compiler/core/parse.y"
+#line 3219 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       call_with_block(p, (yyvsp[-1].nd), (yyvsp[0].nd));
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 9160 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9159 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 313: /* @12: %empty  */
-#line 3225 "mrbgems/mruby-compiler/core/parse.y"
+#line 3224 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_nest(p);
                       nvars_nest(p);
                       (yyval.num) = p->lpar_beg;
                       p->lpar_beg = ++p->paren_nest;
                     }
-#line 9171 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9170 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 314: /* @13: %empty  */
-#line 3232 "mrbgems/mruby-compiler/core/parse.y"
+#line 3231 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.stack) = p->cmdarg_stack;
                       p->cmdarg_stack = 0;
                     }
-#line 9180 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9179 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 315: /* primary: "->" @12 f_larglist @13 lambda_body  */
-#line 3237 "mrbgems/mruby-compiler/core/parse.y"
+#line 3236 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->lpar_beg = (yyvsp[-3].num);
                       (yyval.nd) = new_lambda(p, (yyvsp[-2].nd), (yyvsp[0].nd));
@@ -9189,149 +9188,149 @@ yyreduce:
                       p->cmdarg_stack = (yyvsp[-1].stack);
                       CMDARG_LEXPOP();
                     }
-#line 9193 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9192 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 316: /* primary: "'if'" expr_value then compstmt if_tail "'end'"  */
-#line 3249 "mrbgems/mruby-compiler/core/parse.y"
+#line 3248 "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 9202 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9201 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 317: /* primary: "'unless'" expr_value then compstmt opt_else "'end'"  */
-#line 3257 "mrbgems/mruby-compiler/core/parse.y"
+#line 3256 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_if(p, cond((yyvsp[-4].nd)), (yyvsp[-1].nd), (yyvsp[-2].nd));
                       SET_LINENO((yyval.nd), (yyvsp[-5].num));
                     }
-#line 9211 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9210 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 318: /* $@14: %empty  */
-#line 3261 "mrbgems/mruby-compiler/core/parse.y"
+#line 3260 "mrbgems/mruby-compiler/core/parse.y"
                                 {COND_PUSH(1);}
-#line 9217 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9216 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 319: /* $@15: %empty  */
-#line 3261 "mrbgems/mruby-compiler/core/parse.y"
+#line 3260 "mrbgems/mruby-compiler/core/parse.y"
                                                               {COND_POP();}
-#line 9223 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9222 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 320: /* primary: "'while'" $@14 expr_value do $@15 compstmt "'end'"  */
-#line 3264 "mrbgems/mruby-compiler/core/parse.y"
+#line 3263 "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 9232 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9231 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 321: /* $@16: %empty  */
-#line 3268 "mrbgems/mruby-compiler/core/parse.y"
+#line 3267 "mrbgems/mruby-compiler/core/parse.y"
                                 {COND_PUSH(1);}
-#line 9238 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9237 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 322: /* $@17: %empty  */
-#line 3268 "mrbgems/mruby-compiler/core/parse.y"
+#line 3267 "mrbgems/mruby-compiler/core/parse.y"
                                                               {COND_POP();}
-#line 9244 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9243 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 323: /* primary: "'until'" $@16 expr_value do $@17 compstmt "'end'"  */
-#line 3271 "mrbgems/mruby-compiler/core/parse.y"
+#line 3270 "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 9253 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9252 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 324: /* primary: "'case'" expr_value opt_terms case_body "'end'"  */
-#line 3278 "mrbgems/mruby-compiler/core/parse.y"
+#line 3277 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_case(p, (yyvsp[-3].nd), (yyvsp[-1].nd));
                     }
-#line 9261 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9260 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 325: /* primary: "'case'" opt_terms case_body "'end'"  */
-#line 3282 "mrbgems/mruby-compiler/core/parse.y"
+#line 3281 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_case(p, 0, (yyvsp[-1].nd));
                     }
-#line 9269 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9268 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 326: /* $@18: %empty  */
-#line 3286 "mrbgems/mruby-compiler/core/parse.y"
+#line 3285 "mrbgems/mruby-compiler/core/parse.y"
                   {COND_PUSH(1);}
-#line 9275 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9274 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 327: /* $@19: %empty  */
-#line 3288 "mrbgems/mruby-compiler/core/parse.y"
+#line 3287 "mrbgems/mruby-compiler/core/parse.y"
                   {COND_POP();}
-#line 9281 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9280 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 328: /* primary: "'for'" for_var "'in'" $@18 expr_value do $@19 compstmt "'end'"  */
-#line 3291 "mrbgems/mruby-compiler/core/parse.y"
+#line 3290 "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 9290 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9289 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 329: /* @20: %empty  */
-#line 3297 "mrbgems/mruby-compiler/core/parse.y"
+#line 3296 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if (p->in_def || p->in_single)
                         yyerror(&(yylsp[-2]), p, "class definition in method body");
                       (yyval.nd) = local_switch(p);
                       nvars_block(p);
                     }
-#line 9301 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9300 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 330: /* primary: "'class'" cpath superclass @20 bodystmt "'end'"  */
-#line 3305 "mrbgems/mruby-compiler/core/parse.y"
+#line 3304 "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 9312 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9311 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 331: /* @21: %empty  */
-#line 3313 "mrbgems/mruby-compiler/core/parse.y"
+#line 3312 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.num) = p->in_def;
                       p->in_def = 0;
                     }
-#line 9321 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9320 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 332: /* @22: %empty  */
-#line 3318 "mrbgems/mruby-compiler/core/parse.y"
+#line 3317 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = cons(local_switch(p), int_to_node(p->in_single));
                       nvars_block(p);
                       p->in_single = 0;
                     }
-#line 9331 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9330 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 333: /* primary: "'class'" "<<" expr @21 term @22 bodystmt "'end'"  */
-#line 3325 "mrbgems/mruby-compiler/core/parse.y"
+#line 3324 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_sclass(p, (yyvsp[-5].nd), (yyvsp[-1].nd));
                       SET_LINENO((yyval.nd), (yyvsp[-7].num));
@@ -9340,44 +9339,44 @@ yyreduce:
                       p->in_def = (yyvsp[-4].num);
                       p->in_single = node_to_int((yyvsp[-2].nd)->cdr);
                     }
-#line 9344 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9343 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 334: /* @23: %empty  */
-#line 3335 "mrbgems/mruby-compiler/core/parse.y"
+#line 3334 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if (p->in_def || p->in_single)
                         yyerror(&(yylsp[-1]), p, "module definition in method body");
                       (yyval.nd) = local_switch(p);
                       nvars_block(p);
                     }
-#line 9355 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9354 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 335: /* primary: "'module'" cpath @23 bodystmt "'end'"  */
-#line 3343 "mrbgems/mruby-compiler/core/parse.y"
+#line 3342 "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 9366 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9365 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 336: /* primary: defn_head f_arglist bodystmt "'end'"  */
-#line 3353 "mrbgems/mruby-compiler/core/parse.y"
+#line 3352 "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 9377 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9376 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 337: /* primary: defs_head f_arglist bodystmt "'end'"  */
-#line 3363 "mrbgems/mruby-compiler/core/parse.y"
+#line 3362 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-3].nd);
                       defn_setup(p, (yyval.nd), (yyvsp[-2].nd), (yyvsp[-1].nd));
@@ -9385,610 +9384,610 @@ yyreduce:
                       p->in_def--;
                       p->in_single--;
                     }
-#line 9389 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9388 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 338: /* primary: "'break'"  */
-#line 3371 "mrbgems/mruby-compiler/core/parse.y"
+#line 3370 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_break(p, 0);
                     }
-#line 9397 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9396 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 339: /* primary: "'next'"  */
-#line 3375 "mrbgems/mruby-compiler/core/parse.y"
+#line 3374 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_next(p, 0);
                     }
-#line 9405 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9404 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 340: /* primary: "'redo'"  */
-#line 3379 "mrbgems/mruby-compiler/core/parse.y"
+#line 3378 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_redo(p);
                     }
-#line 9413 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9412 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 341: /* primary: "'retry'"  */
-#line 3383 "mrbgems/mruby-compiler/core/parse.y"
+#line 3382 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_retry(p);
                     }
-#line 9421 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9420 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 342: /* primary_value: primary  */
-#line 3389 "mrbgems/mruby-compiler/core/parse.y"
+#line 3388 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                       if (!(yyval.nd)) (yyval.nd) = new_nil(p);
                     }
-#line 9430 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9429 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 349: /* if_tail: "'elsif'" expr_value then compstmt if_tail  */
-#line 3408 "mrbgems/mruby-compiler/core/parse.y"
+#line 3407 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_if(p, cond((yyvsp[-3].nd)), (yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 9438 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9437 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 351: /* opt_else: "'else'" compstmt  */
-#line 3415 "mrbgems/mruby-compiler/core/parse.y"
+#line 3414 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 9446 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9445 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 352: /* for_var: lhs  */
-#line 3421 "mrbgems/mruby-compiler/core/parse.y"
+#line 3420 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1(list1((yyvsp[0].nd)));
                     }
-#line 9454 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9453 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 354: /* f_margs: f_arg  */
-#line 3428 "mrbgems/mruby-compiler/core/parse.y"
+#line 3427 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3((yyvsp[0].nd),0,0);
                     }
-#line 9462 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9461 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 355: /* f_margs: f_arg ',' "*" f_norm_arg  */
-#line 3432 "mrbgems/mruby-compiler/core/parse.y"
+#line 3431 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3((yyvsp[-3].nd), new_lvar(p, (yyvsp[0].id)), 0);
                     }
-#line 9470 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9469 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 356: /* f_margs: f_arg ',' "*" f_norm_arg ',' f_arg  */
-#line 3436 "mrbgems/mruby-compiler/core/parse.y"
+#line 3435 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3((yyvsp[-5].nd), new_lvar(p, (yyvsp[-2].id)), (yyvsp[0].nd));
                     }
-#line 9478 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9477 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 357: /* f_margs: f_arg ',' "*"  */
-#line 3440 "mrbgems/mruby-compiler/core/parse.y"
+#line 3439 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_f(p, intern_op(mul));
                       (yyval.nd) = list3((yyvsp[-2].nd), int_to_node(-1), 0);
                     }
-#line 9487 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9486 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 358: /* f_margs: f_arg ',' "*" ',' f_arg  */
-#line 3445 "mrbgems/mruby-compiler/core/parse.y"
+#line 3444 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3((yyvsp[-4].nd), int_to_node(-1), (yyvsp[0].nd));
                     }
-#line 9495 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9494 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 359: /* f_margs: "*" f_norm_arg  */
-#line 3449 "mrbgems/mruby-compiler/core/parse.y"
+#line 3448 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3(0, new_lvar(p, (yyvsp[0].id)), 0);
                     }
-#line 9503 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9502 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 360: /* f_margs: "*" f_norm_arg ',' f_arg  */
-#line 3453 "mrbgems/mruby-compiler/core/parse.y"
+#line 3452 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3(0, new_lvar(p, (yyvsp[-2].id)), (yyvsp[0].nd));
                     }
-#line 9511 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9510 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 361: /* f_margs: "*"  */
-#line 3457 "mrbgems/mruby-compiler/core/parse.y"
+#line 3456 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_f(p, intern_op(mul));
                       (yyval.nd) = list3(0, int_to_node(-1), 0);
                     }
-#line 9520 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9519 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 362: /* $@24: %empty  */
-#line 3462 "mrbgems/mruby-compiler/core/parse.y"
+#line 3461 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_f(p, intern_op(mul));
                     }
-#line 9528 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9527 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 363: /* f_margs: "*" ',' $@24 f_arg  */
-#line 3466 "mrbgems/mruby-compiler/core/parse.y"
+#line 3465 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3(0, int_to_node(-1), (yyvsp[0].nd));
                     }
-#line 9536 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9535 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 364: /* block_args_tail: f_block_kwarg ',' f_kwrest opt_f_block_arg  */
-#line 3472 "mrbgems/mruby-compiler/core/parse.y"
+#line 3471 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, (yyvsp[-3].nd), (yyvsp[-1].id), (yyvsp[0].id));
                     }
-#line 9544 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9543 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 365: /* block_args_tail: f_block_kwarg opt_f_block_arg  */
-#line 3476 "mrbgems/mruby-compiler/core/parse.y"
+#line 3475 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, (yyvsp[-1].nd), 0, (yyvsp[0].id));
                     }
-#line 9552 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9551 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 366: /* block_args_tail: f_kwrest opt_f_block_arg  */
-#line 3480 "mrbgems/mruby-compiler/core/parse.y"
+#line 3479 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, 0, (yyvsp[-1].id), (yyvsp[0].id));
                     }
-#line 9560 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9559 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 367: /* block_args_tail: f_block_arg  */
-#line 3484 "mrbgems/mruby-compiler/core/parse.y"
+#line 3483 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, 0, 0, (yyvsp[0].id));
                     }
-#line 9568 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9567 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 368: /* opt_block_args_tail: ',' block_args_tail  */
-#line 3490 "mrbgems/mruby-compiler/core/parse.y"
+#line 3489 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 9576 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9575 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 369: /* opt_block_args_tail: %empty  */
-#line 3494 "mrbgems/mruby-compiler/core/parse.y"
+#line 3493 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, 0, 0, 0);
                     }
-#line 9584 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9583 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 370: /* block_param: f_arg ',' f_block_optarg ',' f_rest_arg opt_block_args_tail  */
-#line 3500 "mrbgems/mruby-compiler/core/parse.y"
+#line 3499 "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 9592 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9591 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 371: /* block_param: f_arg ',' f_block_optarg ',' f_rest_arg ',' f_arg opt_block_args_tail  */
-#line 3504 "mrbgems/mruby-compiler/core/parse.y"
+#line 3503 "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 9600 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9599 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 372: /* block_param: f_arg ',' f_block_optarg opt_block_args_tail  */
-#line 3508 "mrbgems/mruby-compiler/core/parse.y"
+#line 3507 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, (yyvsp[-3].nd), (yyvsp[-1].nd), 0, 0, (yyvsp[0].nd));
                     }
-#line 9608 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9607 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 373: /* block_param: f_arg ',' f_block_optarg ',' f_arg opt_block_args_tail  */
-#line 3512 "mrbgems/mruby-compiler/core/parse.y"
+#line 3511 "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 9616 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9615 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 374: /* block_param: f_arg ',' f_rest_arg opt_block_args_tail  */
-#line 3516 "mrbgems/mruby-compiler/core/parse.y"
+#line 3515 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, (yyvsp[-3].nd), 0, (yyvsp[-1].id), 0, (yyvsp[0].nd));
                     }
-#line 9624 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9623 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 375: /* block_param: f_arg ',' opt_block_args_tail  */
-#line 3520 "mrbgems/mruby-compiler/core/parse.y"
+#line 3519 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, (yyvsp[-2].nd), 0, 0, 0, (yyvsp[0].nd));
                     }
-#line 9632 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9631 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 376: /* block_param: f_arg ',' f_rest_arg ',' f_arg opt_block_args_tail  */
-#line 3524 "mrbgems/mruby-compiler/core/parse.y"
+#line 3523 "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 9640 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9639 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 377: /* block_param: f_arg opt_block_args_tail  */
-#line 3528 "mrbgems/mruby-compiler/core/parse.y"
+#line 3527 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, (yyvsp[-1].nd), 0, 0, 0, (yyvsp[0].nd));
                     }
-#line 9648 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9647 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 378: /* block_param: f_block_optarg ',' f_rest_arg opt_block_args_tail  */
-#line 3532 "mrbgems/mruby-compiler/core/parse.y"
+#line 3531 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, (yyvsp[-3].nd), (yyvsp[-1].id), 0, (yyvsp[0].nd));
                     }
-#line 9656 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9655 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 379: /* block_param: f_block_optarg ',' f_rest_arg ',' f_arg opt_block_args_tail  */
-#line 3536 "mrbgems/mruby-compiler/core/parse.y"
+#line 3535 "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 9664 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9663 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 380: /* block_param: f_block_optarg opt_block_args_tail  */
-#line 3540 "mrbgems/mruby-compiler/core/parse.y"
+#line 3539 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, (yyvsp[-1].nd), 0, 0, (yyvsp[0].nd));
                     }
-#line 9672 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9671 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 381: /* block_param: f_block_optarg ',' f_arg opt_block_args_tail  */
-#line 3544 "mrbgems/mruby-compiler/core/parse.y"
+#line 3543 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, (yyvsp[-3].nd), 0, (yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 9680 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9679 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 382: /* block_param: f_rest_arg opt_block_args_tail  */
-#line 3548 "mrbgems/mruby-compiler/core/parse.y"
+#line 3547 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, 0, (yyvsp[-1].id), 0, (yyvsp[0].nd));
                     }
-#line 9688 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9687 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 383: /* block_param: f_rest_arg ',' f_arg opt_block_args_tail  */
-#line 3552 "mrbgems/mruby-compiler/core/parse.y"
+#line 3551 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, 0, (yyvsp[-3].id), (yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 9696 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9695 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 384: /* block_param: block_args_tail  */
-#line 3556 "mrbgems/mruby-compiler/core/parse.y"
+#line 3555 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, 0, 0, 0, (yyvsp[0].nd));
                     }
-#line 9704 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9703 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 385: /* opt_block_param: none  */
-#line 3562 "mrbgems/mruby-compiler/core/parse.y"
+#line 3561 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_blk(p);
                       (yyval.nd) = 0;
                     }
-#line 9713 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9712 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 386: /* opt_block_param: block_param_def  */
-#line 3567 "mrbgems/mruby-compiler/core/parse.y"
+#line 3566 "mrbgems/mruby-compiler/core/parse.y"
                    {
                       p->cmd_start = TRUE;
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 9722 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9721 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 387: /* $@25: %empty  */
-#line 3573 "mrbgems/mruby-compiler/core/parse.y"
+#line 3572 "mrbgems/mruby-compiler/core/parse.y"
                       {local_add_blk(p);}
-#line 9728 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9727 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 388: /* block_param_def: '|' $@25 opt_bv_decl '|'  */
-#line 3574 "mrbgems/mruby-compiler/core/parse.y"
+#line 3573 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = 0;
                     }
-#line 9736 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9735 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 389: /* block_param_def: "||"  */
-#line 3578 "mrbgems/mruby-compiler/core/parse.y"
+#line 3577 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_blk(p);
                       (yyval.nd) = 0;
                     }
-#line 9745 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9744 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 390: /* block_param_def: '|' block_param opt_bv_decl '|'  */
-#line 3583 "mrbgems/mruby-compiler/core/parse.y"
+#line 3582 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-2].nd);
                     }
-#line 9753 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9752 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 391: /* opt_bv_decl: opt_nl  */
-#line 3589 "mrbgems/mruby-compiler/core/parse.y"
+#line 3588 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = 0;
                     }
-#line 9761 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9760 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 392: /* opt_bv_decl: opt_nl ';' bv_decls opt_nl  */
-#line 3593 "mrbgems/mruby-compiler/core/parse.y"
+#line 3592 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = 0;
                     }
-#line 9769 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9768 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 395: /* bvar: "local variable or method"  */
-#line 3603 "mrbgems/mruby-compiler/core/parse.y"
+#line 3602 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_f(p, (yyvsp[0].id));
                       new_bv(p, (yyvsp[0].id));
                     }
-#line 9778 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9777 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 397: /* f_larglist: '(' f_args opt_bv_decl ')'  */
-#line 3611 "mrbgems/mruby-compiler/core/parse.y"
+#line 3610 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-2].nd);
                     }
-#line 9786 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9785 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 398: /* f_larglist: f_args  */
-#line 3615 "mrbgems/mruby-compiler/core/parse.y"
+#line 3614 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 9794 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9793 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 399: /* lambda_body: tLAMBEG compstmt '}'  */
-#line 3621 "mrbgems/mruby-compiler/core/parse.y"
+#line 3620 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 9802 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9801 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 400: /* lambda_body: "'do' for lambda" bodystmt "'end'"  */
-#line 3625 "mrbgems/mruby-compiler/core/parse.y"
+#line 3624 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 9810 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9809 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 401: /* @26: %empty  */
-#line 3631 "mrbgems/mruby-compiler/core/parse.y"
+#line 3630 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_nest(p);
                       nvars_nest(p);
                       (yyval.num) = p->lineno;
                     }
-#line 9820 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9819 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 402: /* do_block: "'do' for block" @26 opt_block_param bodystmt "'end'"  */
-#line 3639 "mrbgems/mruby-compiler/core/parse.y"
+#line 3638 "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 9831 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9830 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 403: /* block_call: command do_block  */
-#line 3648 "mrbgems/mruby-compiler/core/parse.y"
+#line 3647 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       call_with_block(p, (yyvsp[-1].nd), (yyvsp[0].nd));
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 9840 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9839 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 404: /* block_call: block_call call_op2 operation2 opt_paren_args  */
-#line 3653 "mrbgems/mruby-compiler/core/parse.y"
+#line 3652 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), (yyvsp[-1].id), (yyvsp[0].nd), (yyvsp[-2].num));
                     }
-#line 9848 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9847 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 405: /* block_call: block_call call_op2 operation2 opt_paren_args brace_block  */
-#line 3657 "mrbgems/mruby-compiler/core/parse.y"
+#line 3656 "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 9857 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9856 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 406: /* block_call: block_call call_op2 operation2 command_args do_block  */
-#line 3662 "mrbgems/mruby-compiler/core/parse.y"
+#line 3661 "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 9866 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9865 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 407: /* method_call: operation paren_args  */
-#line 3669 "mrbgems/mruby-compiler/core/parse.y"
+#line 3668 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_fcall(p, (yyvsp[-1].id), (yyvsp[0].nd));
                     }
-#line 9874 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9873 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 408: /* method_call: primary_value call_op operation2 opt_paren_args  */
-#line 3673 "mrbgems/mruby-compiler/core/parse.y"
+#line 3672 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), (yyvsp[-1].id), (yyvsp[0].nd), (yyvsp[-2].num));
                     }
-#line 9882 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9881 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 409: /* method_call: primary_value "::" operation2 paren_args  */
-#line 3677 "mrbgems/mruby-compiler/core/parse.y"
+#line 3676 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), (yyvsp[-1].id), (yyvsp[0].nd), tCOLON2);
                     }
-#line 9890 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9889 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 410: /* method_call: primary_value "::" operation3  */
-#line 3681 "mrbgems/mruby-compiler/core/parse.y"
+#line 3680 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-2].nd), (yyvsp[0].id), 0, tCOLON2);
                     }
-#line 9898 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9897 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 411: /* method_call: primary_value call_op paren_args  */
-#line 3685 "mrbgems/mruby-compiler/core/parse.y"
+#line 3684 "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 9906 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9905 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 412: /* method_call: primary_value "::" paren_args  */
-#line 3689 "mrbgems/mruby-compiler/core/parse.y"
+#line 3688 "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 9914 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9913 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 413: /* method_call: "'super'" paren_args  */
-#line 3693 "mrbgems/mruby-compiler/core/parse.y"
+#line 3692 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_super(p, (yyvsp[0].nd));
                     }
-#line 9922 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9921 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 414: /* method_call: "'super'"  */
-#line 3697 "mrbgems/mruby-compiler/core/parse.y"
+#line 3696 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_zsuper(p);
                     }
-#line 9930 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9929 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 415: /* method_call: primary_value '[' opt_call_args ']'  */
-#line 3701 "mrbgems/mruby-compiler/core/parse.y"
+#line 3700 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), intern_op(aref), (yyvsp[-1].nd), '.');
                     }
-#line 9938 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9937 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 416: /* @27: %empty  */
-#line 3707 "mrbgems/mruby-compiler/core/parse.y"
+#line 3706 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_nest(p);
                       nvars_nest(p);
                       (yyval.num) = p->lineno;
                     }
-#line 9948 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9947 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 417: /* brace_block: '{' @27 opt_block_param compstmt '}'  */
-#line 3714 "mrbgems/mruby-compiler/core/parse.y"
+#line 3713 "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 9959 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9958 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 418: /* @28: %empty  */
-#line 3721 "mrbgems/mruby-compiler/core/parse.y"
+#line 3720 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_nest(p);
                       nvars_nest(p);
                       (yyval.num) = p->lineno;
                     }
-#line 9969 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9968 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 419: /* brace_block: "'do'" @28 opt_block_param bodystmt "'end'"  */
-#line 3728 "mrbgems/mruby-compiler/core/parse.y"
+#line 3727 "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 9980 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9979 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 420: /* case_body: "'when'" args then compstmt cases  */
-#line 3739 "mrbgems/mruby-compiler/core/parse.y"
+#line 3738 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = cons(cons((yyvsp[-3].nd), (yyvsp[-1].nd)), (yyvsp[0].nd));
                     }
-#line 9988 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9987 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 421: /* cases: opt_else  */
-#line 3745 "mrbgems/mruby-compiler/core/parse.y"
+#line 3744 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if ((yyvsp[0].nd)) {
                         (yyval.nd) = cons(cons(0, (yyvsp[0].nd)), 0);
@@ -9997,155 +9996,155 @@ yyreduce:
                         (yyval.nd) = 0;
                       }
                     }
-#line 10001 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10000 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 423: /* opt_rescue: "'rescue'" exc_list exc_var then compstmt opt_rescue  */
-#line 3759 "mrbgems/mruby-compiler/core/parse.y"
+#line 3758 "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 10010 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10009 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 425: /* exc_list: arg  */
-#line 3767 "mrbgems/mruby-compiler/core/parse.y"
+#line 3766 "mrbgems/mruby-compiler/core/parse.y"
                     {
                         (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 10018 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10017 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 428: /* exc_var: "=>" lhs  */
-#line 3775 "mrbgems/mruby-compiler/core/parse.y"
+#line 3774 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 10026 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10025 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 430: /* opt_ensure: "'ensure'" compstmt  */
-#line 3782 "mrbgems/mruby-compiler/core/parse.y"
+#line 3781 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 10034 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10033 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 437: /* string: string string_fragment  */
-#line 3796 "mrbgems/mruby-compiler/core/parse.y"
+#line 3795 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = append((yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 10042 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10041 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 438: /* string_fragment: "character literal"  */
-#line 3802 "mrbgems/mruby-compiler/core/parse.y"
+#line 3801 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       /* tCHAR is (len . str), wrap as cons list */
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 10051 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10050 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 439: /* string_fragment: tSTRING  */
-#line 3807 "mrbgems/mruby-compiler/core/parse.y"
+#line 3806 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       /* tSTRING is (len . str), wrap as cons list */
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 10060 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10059 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 440: /* string_fragment: "string literal" tSTRING  */
-#line 3812 "mrbgems/mruby-compiler/core/parse.y"
+#line 3811 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       /* $2 is (len . str), wrap as cons list */
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 10069 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10068 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 441: /* string_fragment: "string literal" string_rep tSTRING  */
-#line 3817 "mrbgems/mruby-compiler/core/parse.y"
+#line 3816 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 10077 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10076 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 443: /* string_rep: string_rep string_interp  */
-#line 3824 "mrbgems/mruby-compiler/core/parse.y"
+#line 3823 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = append((yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 10085 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10084 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 444: /* string_interp: tSTRING_MID  */
-#line 3830 "mrbgems/mruby-compiler/core/parse.y"
+#line 3829 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       /* $1 is already in (len . str) format */
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 10094 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10093 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 445: /* @29: %empty  */
-#line 3835 "mrbgems/mruby-compiler/core/parse.y"
+#line 3834 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push_strterm(p);
                     }
-#line 10102 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10101 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 446: /* string_interp: tSTRING_PART @29 compstmt '}'  */
-#line 3840 "mrbgems/mruby-compiler/core/parse.y"
+#line 3839 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       pop_strterm(p,(yyvsp[-2].nd));
                       /* $1 is already in (len . str) format, create (-1 . node) for expression */
                       node *expr_elem = cons(int_to_node(-1), (yyvsp[-1].nd));
                       (yyval.nd) = list2((yyvsp[-3].nd), expr_elem);
                     }
-#line 10113 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10112 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 447: /* string_interp: tLITERAL_DELIM  */
-#line 3847 "mrbgems/mruby-compiler/core/parse.y"
+#line 3846 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1(new_literal_delim(p));
                     }
-#line 10121 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10120 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 448: /* string_interp: tHD_LITERAL_DELIM heredoc_bodies  */
-#line 3851 "mrbgems/mruby-compiler/core/parse.y"
+#line 3850 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1(new_literal_delim(p));
                     }
-#line 10129 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10128 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 449: /* xstring: tXSTRING_BEG tXSTRING  */
-#line 3857 "mrbgems/mruby-compiler/core/parse.y"
+#line 3856 "mrbgems/mruby-compiler/core/parse.y"
                     {
                         (yyval.nd) = cons((yyvsp[0].nd), (node*)NULL);
                     }
-#line 10137 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10136 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 450: /* xstring: tXSTRING_BEG string_rep tXSTRING  */
-#line 3861 "mrbgems/mruby-compiler/core/parse.y"
+#line 3860 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 10145 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10144 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 451: /* regexp: tREGEXP_BEG tREGEXP  */
-#line 3867 "mrbgems/mruby-compiler/core/parse.y"
+#line 3866 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       node *data = (yyvsp[0].nd);  /* ((len . pattern) . (flags . encoding)) */
                       const char *flags = (const char*)data->cdr->car;
@@ -10154,11 +10153,11 @@ yyreduce:
                       node *pattern_list = cons(data->car, (node*)NULL);
                       (yyval.nd) = new_regx(p, pattern_list, flags, encoding);
                     }
-#line 10158 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10157 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 452: /* regexp: tREGEXP_BEG string_rep tREGEXP  */
-#line 3876 "mrbgems/mruby-compiler/core/parse.y"
+#line 3875 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       node *data = (yyvsp[0].nd);  /* ((len . pattern) . (flags . encoding)) */
                       const char *flags = (const char*)data->cdr->car;
@@ -10167,47 +10166,47 @@ yyreduce:
                       node *complete_list = push((yyvsp[-1].nd), data->car);
                       (yyval.nd) = new_regx(p, complete_list, flags, encoding);
                     }
-#line 10171 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10170 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 456: /* heredoc_body: tHEREDOC_END  */
-#line 3894 "mrbgems/mruby-compiler/core/parse.y"
+#line 3893 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       parser_heredoc_info *info = parsing_heredoc_info(p);
                       info->doc = push(info->doc, new_str_empty(p));
                       heredoc_end(p);
                     }
-#line 10181 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10180 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 457: /* heredoc_body: heredoc_string_rep tHEREDOC_END  */
-#line 3900 "mrbgems/mruby-compiler/core/parse.y"
+#line 3899 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       heredoc_end(p);
                     }
-#line 10189 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10188 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 460: /* heredoc_string_interp: tHD_STRING_MID  */
-#line 3910 "mrbgems/mruby-compiler/core/parse.y"
+#line 3909 "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 10199 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10198 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 461: /* @30: %empty  */
-#line 3916 "mrbgems/mruby-compiler/core/parse.y"
+#line 3915 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push_strterm(p);
                     }
-#line 10207 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10206 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 462: /* heredoc_string_interp: tHD_STRING_PART @30 compstmt '}'  */
-#line 3921 "mrbgems/mruby-compiler/core/parse.y"
+#line 3920 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       pop_strterm(p, (yyvsp[-2].nd));
                       parser_heredoc_info *info = parsing_heredoc_info(p);
@@ -10215,37 +10214,37 @@ yyreduce:
                       node *expr_elem = cons(int_to_node(-1), (yyvsp[-1].nd));
                       info->doc = push(push(info->doc, (yyvsp[-3].nd)), expr_elem);
                     }
-#line 10219 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10218 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 463: /* words: tWORDS_BEG tSTRING  */
-#line 3931 "mrbgems/mruby-compiler/core/parse.y"
+#line 3930 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_words(p, list1((yyvsp[0].nd)));
                     }
-#line 10227 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10226 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 464: /* words: tWORDS_BEG string_rep tSTRING  */
-#line 3935 "mrbgems/mruby-compiler/core/parse.y"
+#line 3934 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       node *n = (yyvsp[-1].nd);
                       n = push(n, (yyvsp[0].nd));
                       (yyval.nd) = new_words(p, n);
                     }
-#line 10237 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10236 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 465: /* symbol: basic_symbol  */
-#line 3943 "mrbgems/mruby-compiler/core/parse.y"
+#line 3942 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_sym(p, (yyvsp[0].id));
                     }
-#line 10245 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10244 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 466: /* symbol: "symbol" "string literal" string_rep tSTRING  */
-#line 3947 "mrbgems/mruby-compiler/core/parse.y"
+#line 3946 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       node *n = (yyvsp[-1].nd);
                       p->lstate = EXPR_ENDARG;
@@ -10257,183 +10256,183 @@ yyreduce:
                       }
                       (yyval.nd) = new_dsym(p, new_str(p, n));
                     }
-#line 10261 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10260 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 467: /* symbol: "symbol" "numbered parameter"  */
-#line 3959 "mrbgems/mruby-compiler/core/parse.y"
+#line 3958 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       mrb_sym sym = intern_numparam((yyvsp[0].num));
                       (yyval.nd) = new_sym(p, sym);
                     }
-#line 10270 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10269 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 468: /* basic_symbol: "symbol" sym  */
-#line 3966 "mrbgems/mruby-compiler/core/parse.y"
+#line 3965 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->lstate = EXPR_END;
                       (yyval.id) = (yyvsp[0].id);
                     }
-#line 10279 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10278 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 473: /* sym: tSTRING  */
-#line 3977 "mrbgems/mruby-compiler/core/parse.y"
+#line 3976 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.id) = new_strsym(p, (yyvsp[0].nd));
                     }
-#line 10287 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10286 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 474: /* sym: "string literal" tSTRING  */
-#line 3981 "mrbgems/mruby-compiler/core/parse.y"
+#line 3980 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.id) = new_strsym(p, (yyvsp[0].nd));
                     }
-#line 10295 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10294 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 475: /* symbols: tSYMBOLS_BEG tSTRING  */
-#line 3987 "mrbgems/mruby-compiler/core/parse.y"
+#line 3986 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_symbols(p, list1((yyvsp[0].nd)));
                     }
-#line 10303 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10302 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 476: /* symbols: tSYMBOLS_BEG string_rep tSTRING  */
-#line 3991 "mrbgems/mruby-compiler/core/parse.y"
+#line 3990 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       node *n = (yyvsp[-1].nd);
                       n = push(n, (yyvsp[0].nd));
                       (yyval.nd) = new_symbols(p, n);
                     }
-#line 10313 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10312 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 479: /* numeric: tUMINUS_NUM "integer literal"  */
-#line 4001 "mrbgems/mruby-compiler/core/parse.y"
+#line 4000 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_negate(p, (yyvsp[0].nd));
                     }
-#line 10321 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10320 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 480: /* numeric: tUMINUS_NUM "float literal"  */
-#line 4005 "mrbgems/mruby-compiler/core/parse.y"
+#line 4004 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_negate(p, (yyvsp[0].nd));
                     }
-#line 10329 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10328 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 481: /* variable: "local variable or method"  */
-#line 4011 "mrbgems/mruby-compiler/core/parse.y"
+#line 4010 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_lvar(p, (yyvsp[0].id));
                     }
-#line 10337 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10336 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 482: /* variable: "instance variable"  */
-#line 4015 "mrbgems/mruby-compiler/core/parse.y"
+#line 4014 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_ivar(p, (yyvsp[0].id));
                     }
-#line 10345 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10344 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 483: /* variable: "global variable"  */
-#line 4019 "mrbgems/mruby-compiler/core/parse.y"
+#line 4018 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_gvar(p, (yyvsp[0].id));
                     }
-#line 10353 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10352 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 484: /* variable: "class variable"  */
-#line 4023 "mrbgems/mruby-compiler/core/parse.y"
+#line 4022 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_cvar(p, (yyvsp[0].id));
                     }
-#line 10361 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10360 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 485: /* variable: "constant"  */
-#line 4027 "mrbgems/mruby-compiler/core/parse.y"
+#line 4026 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_const(p, (yyvsp[0].id));
                     }
-#line 10369 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10368 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 486: /* var_lhs: variable  */
-#line 4033 "mrbgems/mruby-compiler/core/parse.y"
+#line 4032 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       assignable(p, (yyvsp[0].nd));
                     }
-#line 10377 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10376 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 487: /* var_lhs: "numbered parameter"  */
-#line 4037 "mrbgems/mruby-compiler/core/parse.y"
+#line 4036 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[0]), p, "can't assign to numbered parameter");
                     }
-#line 10385 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10384 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 488: /* var_ref: variable  */
-#line 4043 "mrbgems/mruby-compiler/core/parse.y"
+#line 4042 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = var_reference(p, (yyvsp[0].nd));
                     }
-#line 10393 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10392 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 489: /* var_ref: "numbered parameter"  */
-#line 4047 "mrbgems/mruby-compiler/core/parse.y"
+#line 4046 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_nvar(p, (yyvsp[0].num));
                     }
-#line 10401 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10400 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 490: /* var_ref: "'nil'"  */
-#line 4051 "mrbgems/mruby-compiler/core/parse.y"
+#line 4050 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_nil(p);
                     }
-#line 10409 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10408 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 491: /* var_ref: "'self'"  */
-#line 4055 "mrbgems/mruby-compiler/core/parse.y"
+#line 4054 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_self(p);
                     }
-#line 10417 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10416 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 492: /* var_ref: "'true'"  */
-#line 4059 "mrbgems/mruby-compiler/core/parse.y"
+#line 4058 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_true(p);
                     }
-#line 10425 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10424 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 493: /* var_ref: "'false'"  */
-#line 4063 "mrbgems/mruby-compiler/core/parse.y"
+#line 4062 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_false(p);
                     }
-#line 10433 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10432 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 494: /* var_ref: "'__FILE__'"  */
-#line 4067 "mrbgems/mruby-compiler/core/parse.y"
+#line 4066 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       const char *fn = mrb_sym_name_len(p->mrb, p->filename_sym, NULL);
                       if (!fn) {
@@ -10441,686 +10440,686 @@ yyreduce:
                       }
                       (yyval.nd) = new_str(p, cons(cons(int_to_node(strlen(fn)), (node*)fn), (node*)NULL));
                     }
-#line 10445 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10444 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 495: /* var_ref: "'__LINE__'"  */
-#line 4075 "mrbgems/mruby-compiler/core/parse.y"
+#line 4074 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       char buf[16];
 
                       dump_int(p->lineno, buf);
                       (yyval.nd) = new_int(p, buf, 10, 0);
                     }
-#line 10456 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10455 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 496: /* var_ref: "'__ENCODING__'"  */
-#line 4082 "mrbgems/mruby-compiler/core/parse.y"
+#line 4081 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_fcall(p, MRB_SYM_2(p->mrb, __ENCODING__), 0);
                     }
-#line 10464 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10463 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 499: /* superclass: %empty  */
-#line 4092 "mrbgems/mruby-compiler/core/parse.y"
+#line 4091 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = 0;
                     }
-#line 10472 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10471 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 500: /* $@31: %empty  */
-#line 4096 "mrbgems/mruby-compiler/core/parse.y"
+#line 4095 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->lstate = EXPR_BEG;
                       p->cmd_start = TRUE;
                     }
-#line 10481 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10480 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 501: /* superclass: '<' $@31 expr_value term  */
-#line 4101 "mrbgems/mruby-compiler/core/parse.y"
+#line 4100 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 10489 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10488 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 504: /* f_arglist_paren: '(' f_args rparen  */
-#line 4117 "mrbgems/mruby-compiler/core/parse.y"
+#line 4116 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                       p->lstate = EXPR_BEG;
                       p->cmd_start = TRUE;
                     }
-#line 10499 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10498 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 505: /* f_arglist_paren: '(' f_arg ',' tBDOT3 rparen  */
-#line 4123 "mrbgems/mruby-compiler/core/parse.y"
+#line 4122 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_dots(p, (yyvsp[-3].nd));
                     }
-#line 10507 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10506 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 506: /* f_arglist_paren: '(' tBDOT3 rparen  */
-#line 4127 "mrbgems/mruby-compiler/core/parse.y"
+#line 4126 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_dots(p, 0);
                     }
-#line 10515 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10514 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 508: /* f_arglist: f_args term  */
-#line 4134 "mrbgems/mruby-compiler/core/parse.y"
+#line 4133 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 10523 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10522 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 509: /* f_arglist: f_arg ',' tBDOT3 term  */
-#line 4138 "mrbgems/mruby-compiler/core/parse.y"
+#line 4137 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_dots(p, (yyvsp[-3].nd));
                     }
-#line 10531 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10530 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 510: /* f_arglist: "..." term  */
-#line 4142 "mrbgems/mruby-compiler/core/parse.y"
+#line 4141 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_dots(p, 0);
                     }
-#line 10539 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10538 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 511: /* f_label: "local variable or method" "label"  */
-#line 4148 "mrbgems/mruby-compiler/core/parse.y"
+#line 4147 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_nest(p);
                     }
-#line 10547 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10546 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 512: /* f_label: "numbered parameter" "label"  */
-#line 4152 "mrbgems/mruby-compiler/core/parse.y"
+#line 4151 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_nest(p);
                     }
-#line 10555 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10554 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 513: /* f_kw: f_label arg  */
-#line 4158 "mrbgems/mruby-compiler/core/parse.y"
+#line 4157 "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 10565 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10564 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 514: /* f_kw: f_label  */
-#line 4164 "mrbgems/mruby-compiler/core/parse.y"
+#line 4163 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_kw_arg(p, (yyvsp[0].id), 0);
                       local_unnest(p);
                     }
-#line 10574 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10573 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 515: /* f_block_kw: f_label primary_value  */
-#line 4171 "mrbgems/mruby-compiler/core/parse.y"
+#line 4170 "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 10584 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10583 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 516: /* f_block_kw: f_label  */
-#line 4177 "mrbgems/mruby-compiler/core/parse.y"
+#line 4176 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_kw_arg(p, (yyvsp[0].id), 0);
                       local_unnest(p);
                     }
-#line 10593 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10592 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 517: /* f_block_kwarg: f_block_kw  */
-#line 4184 "mrbgems/mruby-compiler/core/parse.y"
+#line 4183 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 10601 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10600 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 518: /* f_block_kwarg: f_block_kwarg ',' f_block_kw  */
-#line 4188 "mrbgems/mruby-compiler/core/parse.y"
+#line 4187 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 10609 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10608 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 519: /* f_kwarg: f_kw  */
-#line 4194 "mrbgems/mruby-compiler/core/parse.y"
+#line 4193 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 10617 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10616 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 520: /* f_kwarg: f_kwarg ',' f_kw  */
-#line 4198 "mrbgems/mruby-compiler/core/parse.y"
+#line 4197 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 10625 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10624 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 523: /* f_kwrest: kwrest_mark "local variable or method"  */
-#line 4208 "mrbgems/mruby-compiler/core/parse.y"
+#line 4207 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.id) = (yyvsp[0].id);
                     }
-#line 10633 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10632 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 524: /* f_kwrest: kwrest_mark  */
-#line 4212 "mrbgems/mruby-compiler/core/parse.y"
+#line 4211 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.id) = intern_op(pow);
                     }
-#line 10641 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10640 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 525: /* args_tail: f_kwarg ',' f_kwrest opt_f_block_arg  */
-#line 4218 "mrbgems/mruby-compiler/core/parse.y"
+#line 4217 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, (yyvsp[-3].nd), (yyvsp[-1].id), (yyvsp[0].id));
                     }
-#line 10649 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10648 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 526: /* args_tail: f_kwarg opt_f_block_arg  */
-#line 4222 "mrbgems/mruby-compiler/core/parse.y"
+#line 4221 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, (yyvsp[-1].nd), 0, (yyvsp[0].id));
                     }
-#line 10657 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10656 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 527: /* args_tail: f_kwrest opt_f_block_arg  */
-#line 4226 "mrbgems/mruby-compiler/core/parse.y"
+#line 4225 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, 0, (yyvsp[-1].id), (yyvsp[0].id));
                     }
-#line 10665 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10664 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 528: /* args_tail: f_block_arg  */
-#line 4230 "mrbgems/mruby-compiler/core/parse.y"
+#line 4229 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, 0, 0, (yyvsp[0].id));
                     }
-#line 10673 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10672 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 529: /* opt_args_tail: ',' args_tail  */
-#line 4236 "mrbgems/mruby-compiler/core/parse.y"
+#line 4235 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 10681 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10680 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 530: /* opt_args_tail: %empty  */
-#line 4240 "mrbgems/mruby-compiler/core/parse.y"
+#line 4239 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, 0, 0, 0);
                     }
-#line 10689 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10688 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 531: /* f_args: f_arg ',' f_optarg ',' f_rest_arg opt_args_tail  */
-#line 4246 "mrbgems/mruby-compiler/core/parse.y"
+#line 4245 "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 10697 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10696 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 532: /* f_args: f_arg ',' f_optarg ',' f_rest_arg ',' f_arg opt_args_tail  */
-#line 4250 "mrbgems/mruby-compiler/core/parse.y"
+#line 4249 "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 10705 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10704 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 533: /* f_args: f_arg ',' f_optarg opt_args_tail  */
-#line 4254 "mrbgems/mruby-compiler/core/parse.y"
+#line 4253 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, (yyvsp[-3].nd), (yyvsp[-1].nd), 0, 0, (yyvsp[0].nd));
                     }
-#line 10713 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10712 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 534: /* f_args: f_arg ',' f_optarg ',' f_arg opt_args_tail  */
-#line 4258 "mrbgems/mruby-compiler/core/parse.y"
+#line 4257 "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 10721 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10720 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 535: /* f_args: f_arg ',' f_rest_arg opt_args_tail  */
-#line 4262 "mrbgems/mruby-compiler/core/parse.y"
+#line 4261 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, (yyvsp[-3].nd), 0, (yyvsp[-1].id), 0, (yyvsp[0].nd));
                     }
-#line 10729 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10728 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 536: /* f_args: f_arg ',' f_rest_arg ',' f_arg opt_args_tail  */
-#line 4266 "mrbgems/mruby-compiler/core/parse.y"
+#line 4265 "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 10737 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10736 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 537: /* f_args: f_arg opt_args_tail  */
-#line 4270 "mrbgems/mruby-compiler/core/parse.y"
+#line 4269 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, (yyvsp[-1].nd), 0, 0, 0, (yyvsp[0].nd));
                     }
-#line 10745 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10744 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 538: /* f_args: f_optarg ',' f_rest_arg opt_args_tail  */
-#line 4274 "mrbgems/mruby-compiler/core/parse.y"
+#line 4273 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, (yyvsp[-3].nd), (yyvsp[-1].id), 0, (yyvsp[0].nd));
                     }
-#line 10753 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10752 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 539: /* f_args: f_optarg ',' f_rest_arg ',' f_arg opt_args_tail  */
-#line 4278 "mrbgems/mruby-compiler/core/parse.y"
+#line 4277 "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 10761 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10760 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 540: /* f_args: f_optarg opt_args_tail  */
-#line 4282 "mrbgems/mruby-compiler/core/parse.y"
+#line 4281 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, (yyvsp[-1].nd), 0, 0, (yyvsp[0].nd));
                     }
-#line 10769 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10768 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 541: /* f_args: f_optarg ',' f_arg opt_args_tail  */
-#line 4286 "mrbgems/mruby-compiler/core/parse.y"
+#line 4285 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, (yyvsp[-3].nd), 0, (yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 10777 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10776 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 542: /* f_args: f_rest_arg opt_args_tail  */
-#line 4290 "mrbgems/mruby-compiler/core/parse.y"
+#line 4289 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, 0, (yyvsp[-1].id), 0, (yyvsp[0].nd));
                     }
-#line 10785 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10784 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 543: /* f_args: f_rest_arg ',' f_arg opt_args_tail  */
-#line 4294 "mrbgems/mruby-compiler/core/parse.y"
+#line 4293 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, 0, (yyvsp[-3].id), (yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 10793 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10792 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 544: /* f_args: args_tail  */
-#line 4298 "mrbgems/mruby-compiler/core/parse.y"
+#line 4297 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, 0, 0, 0, (yyvsp[0].nd));
                     }
-#line 10801 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10800 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 545: /* f_args: %empty  */
-#line 4302 "mrbgems/mruby-compiler/core/parse.y"
+#line 4301 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_f(p, 0);
                       (yyval.nd) = new_args(p, 0, 0, 0, 0, 0);
                     }
-#line 10810 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10809 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 546: /* f_bad_arg: "constant"  */
-#line 4309 "mrbgems/mruby-compiler/core/parse.y"
+#line 4308 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[0]), p, "formal argument cannot be a constant");
                       (yyval.nd) = 0;
                     }
-#line 10819 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10818 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 547: /* f_bad_arg: "instance variable"  */
-#line 4314 "mrbgems/mruby-compiler/core/parse.y"
+#line 4313 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[0]), p, "formal argument cannot be an instance variable");
                       (yyval.nd) = 0;
                     }
-#line 10828 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10827 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 548: /* f_bad_arg: "global variable"  */
-#line 4319 "mrbgems/mruby-compiler/core/parse.y"
+#line 4318 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[0]), p, "formal argument cannot be a global variable");
                       (yyval.nd) = 0;
                     }
-#line 10837 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10836 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 549: /* f_bad_arg: "class variable"  */
-#line 4324 "mrbgems/mruby-compiler/core/parse.y"
+#line 4323 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[0]), p, "formal argument cannot be a class variable");
                       (yyval.nd) = 0;
                     }
-#line 10846 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10845 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 550: /* f_bad_arg: "numbered parameter"  */
-#line 4329 "mrbgems/mruby-compiler/core/parse.y"
+#line 4328 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[0]), p, "formal argument cannot be a numbered parameter");
                       (yyval.nd) = 0;
                     }
-#line 10855 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10854 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 551: /* f_norm_arg: f_bad_arg  */
-#line 4336 "mrbgems/mruby-compiler/core/parse.y"
+#line 4335 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.id) = 0;
                     }
-#line 10863 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10862 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 552: /* f_norm_arg: "local variable or method"  */
-#line 4340 "mrbgems/mruby-compiler/core/parse.y"
+#line 4339 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_f(p, (yyvsp[0].id));
                       (yyval.id) = (yyvsp[0].id);
                     }
-#line 10872 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10871 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 553: /* f_arg_item: f_norm_arg  */
-#line 4347 "mrbgems/mruby-compiler/core/parse.y"
+#line 4346 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_lvar(p, (yyvsp[0].id));
                     }
-#line 10880 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10879 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 554: /* @32: %empty  */
-#line 4351 "mrbgems/mruby-compiler/core/parse.y"
+#line 4350 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = local_switch(p);
                     }
-#line 10888 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10887 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 555: /* f_arg_item: tLPAREN @32 f_margs rparen  */
-#line 4355 "mrbgems/mruby-compiler/core/parse.y"
+#line 4354 "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 10898 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10897 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 556: /* f_arg: f_arg_item  */
-#line 4363 "mrbgems/mruby-compiler/core/parse.y"
+#line 4362 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 10906 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10905 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 557: /* f_arg: f_arg ',' f_arg_item  */
-#line 4367 "mrbgems/mruby-compiler/core/parse.y"
+#line 4366 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 10914 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10913 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 558: /* f_opt_asgn: "local variable or method" '='  */
-#line 4373 "mrbgems/mruby-compiler/core/parse.y"
+#line 4372 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_f(p, (yyvsp[-1].id));
                       local_nest(p);
                       (yyval.id) = (yyvsp[-1].id);
                     }
-#line 10924 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10923 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 559: /* f_opt: f_opt_asgn arg  */
-#line 4381 "mrbgems/mruby-compiler/core/parse.y"
+#line 4380 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       void_expr_error(p, (yyvsp[0].nd));
                       (yyval.nd) = cons(sym_to_node((yyvsp[-1].id)), cons((yyvsp[0].nd), locals_node(p)));
                       local_unnest(p);
                     }
-#line 10934 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10933 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 560: /* f_block_opt: f_opt_asgn primary_value  */
-#line 4389 "mrbgems/mruby-compiler/core/parse.y"
+#line 4388 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       void_expr_error(p, (yyvsp[0].nd));
                       (yyval.nd) = cons(sym_to_node((yyvsp[-1].id)), cons((yyvsp[0].nd), locals_node(p)));
                       local_unnest(p);
                     }
-#line 10944 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10943 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 561: /* f_block_optarg: f_block_opt  */
-#line 4397 "mrbgems/mruby-compiler/core/parse.y"
+#line 4396 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 10952 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10951 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 562: /* f_block_optarg: f_block_optarg ',' f_block_opt  */
-#line 4401 "mrbgems/mruby-compiler/core/parse.y"
+#line 4400 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 10960 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10959 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 563: /* f_optarg: f_opt  */
-#line 4407 "mrbgems/mruby-compiler/core/parse.y"
+#line 4406 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 10968 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10967 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 564: /* f_optarg: f_optarg ',' f_opt  */
-#line 4411 "mrbgems/mruby-compiler/core/parse.y"
+#line 4410 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 10976 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10975 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 567: /* f_rest_arg: restarg_mark "local variable or method"  */
-#line 4421 "mrbgems/mruby-compiler/core/parse.y"
+#line 4420 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_f(p, (yyvsp[0].id));
                       (yyval.id) = (yyvsp[0].id);
                     }
-#line 10985 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10984 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 568: /* f_rest_arg: restarg_mark  */
-#line 4426 "mrbgems/mruby-compiler/core/parse.y"
+#line 4425 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.id) = intern_op(mul);
                       local_add_f(p, (yyval.id));
                     }
-#line 10994 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10993 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 571: /* f_block_arg: blkarg_mark "local variable or method"  */
-#line 4437 "mrbgems/mruby-compiler/core/parse.y"
+#line 4436 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.id) = (yyvsp[0].id);
                     }
-#line 11002 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11001 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 572: /* f_block_arg: blkarg_mark  */
-#line 4441 "mrbgems/mruby-compiler/core/parse.y"
+#line 4440 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.id) = intern_op(and);
                     }
-#line 11010 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11009 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 573: /* opt_f_block_arg: ',' f_block_arg  */
-#line 4447 "mrbgems/mruby-compiler/core/parse.y"
+#line 4446 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.id) = (yyvsp[0].id);
                     }
-#line 11018 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11017 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 574: /* opt_f_block_arg: none  */
-#line 4451 "mrbgems/mruby-compiler/core/parse.y"
+#line 4450 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.id) = 0;
                     }
-#line 11026 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11025 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 575: /* singleton: var_ref  */
-#line 4457 "mrbgems/mruby-compiler/core/parse.y"
+#line 4456 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       prohibit_literals(p, (yyvsp[0].nd));
                       (yyval.nd) = (yyvsp[0].nd);
                       if (!(yyval.nd)) (yyval.nd) = new_nil(p);
                     }
-#line 11036 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11035 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 576: /* $@33: %empty  */
-#line 4462 "mrbgems/mruby-compiler/core/parse.y"
+#line 4461 "mrbgems/mruby-compiler/core/parse.y"
                       {p->lstate = EXPR_BEG;}
-#line 11042 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11041 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 577: /* singleton: '(' $@33 expr rparen  */
-#line 4463 "mrbgems/mruby-compiler/core/parse.y"
+#line 4462 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       prohibit_literals(p, (yyvsp[-1].nd));
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 11051 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11050 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 579: /* assoc_list: assocs trailer  */
-#line 4471 "mrbgems/mruby-compiler/core/parse.y"
+#line 4470 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 11059 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11058 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 580: /* assocs: assoc  */
-#line 4477 "mrbgems/mruby-compiler/core/parse.y"
+#line 4476 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 11067 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11066 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 581: /* assocs: assocs comma assoc  */
-#line 4481 "mrbgems/mruby-compiler/core/parse.y"
+#line 4480 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 11075 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11074 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 582: /* assoc: arg "=>" arg  */
-#line 4487 "mrbgems/mruby-compiler/core/parse.y"
+#line 4486 "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 11085 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11084 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 583: /* assoc: "local variable or method" "label" arg  */
-#line 4493 "mrbgems/mruby-compiler/core/parse.y"
+#line 4492 "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 11094 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11093 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 584: /* assoc: "local variable or method" "label"  */
-#line 4498 "mrbgems/mruby-compiler/core/parse.y"
+#line 4497 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = cons(new_sym(p, (yyvsp[-1].id)), label_reference(p, (yyvsp[-1].id)));
                     }
-#line 11102 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11101 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 585: /* assoc: "numbered parameter" "label"  */
-#line 4502 "mrbgems/mruby-compiler/core/parse.y"
+#line 4501 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       mrb_sym sym = intern_numparam((yyvsp[-1].num));
                       (yyval.nd) = cons(new_sym(p, sym), label_reference(p, sym));
                     }
-#line 11111 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11110 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 586: /* assoc: "numbered parameter" "label" arg  */
-#line 4507 "mrbgems/mruby-compiler/core/parse.y"
+#line 4506 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       void_expr_error(p, (yyvsp[0].nd));
                       (yyval.nd) = cons(new_sym(p, intern_numparam((yyvsp[-2].num))), (yyvsp[0].nd));
                     }
-#line 11120 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11119 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 587: /* assoc: string_fragment "label" arg  */
-#line 4512 "mrbgems/mruby-compiler/core/parse.y"
+#line 4511 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       void_expr_error(p, (yyvsp[0].nd));
                       if ((yyvsp[-2].nd)->cdr) {
@@ -11136,75 +11135,75 @@ yyreduce:
                         (yyval.nd) = cons(new_sym(p, new_strsym(p, (yyvsp[-2].nd)->car)), (yyvsp[0].nd));
                       }
                     }
-#line 11140 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11139 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 588: /* assoc: "**" arg  */
-#line 4528 "mrbgems/mruby-compiler/core/parse.y"
+#line 4527 "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 11149 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11148 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 589: /* assoc: "**"  */
-#line 4533 "mrbgems/mruby-compiler/core/parse.y"
+#line 4532 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = cons(new_kw_rest_args(p, 0), new_lvar(p, intern_op(pow)));
                     }
-#line 11157 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11156 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 602: /* call_op: '.'  */
-#line 4559 "mrbgems/mruby-compiler/core/parse.y"
+#line 4558 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.num) = '.';
                     }
-#line 11165 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11164 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 603: /* call_op: "&."  */
-#line 4563 "mrbgems/mruby-compiler/core/parse.y"
+#line 4562 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.num) = 0;
                     }
-#line 11173 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11172 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 605: /* call_op2: "::"  */
-#line 4570 "mrbgems/mruby-compiler/core/parse.y"
+#line 4569 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.num) = tCOLON2;
                     }
-#line 11181 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11180 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 614: /* term: ';'  */
-#line 4591 "mrbgems/mruby-compiler/core/parse.y"
+#line 4590 "mrbgems/mruby-compiler/core/parse.y"
                       {yyerrok;}
-#line 11187 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11186 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 616: /* nl: '\n'  */
-#line 4596 "mrbgems/mruby-compiler/core/parse.y"
+#line 4595 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->lineno += (yyvsp[0].num);
                       p->column = 0;
                     }
-#line 11196 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11195 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 620: /* none: %empty  */
-#line 4608 "mrbgems/mruby-compiler/core/parse.y"
+#line 4607 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = 0;
                     }
-#line 11204 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11203 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
 
-#line 11208 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11207 "mrbgems/mruby-compiler/core/y.tab.c"
 
       default: break;
     }
@@ -11437,7 +11436,7 @@ yyreturnlab:
   return yyresult;
 }
 
-#line 4612 "mrbgems/mruby-compiler/core/parse.y"
+#line 4611 "mrbgems/mruby-compiler/core/parse.y"
 
 #define pylval  (*((YYSTYPE*)(p->ylval)))
 
@@ -15018,16 +15017,6 @@ mrb_parser_dump(mrb_state *mrb, node *tree, int offset)
     printf("NODE_RETRY\n");
     break;
 
-  case NODE_MATCH:
-    printf("NODE_MATCH:\n");
-    dump_prefix(offset + 1, lineno);
-    printf("lhs:\n");
-    mrb_parser_dump(mrb, tree->car, offset + 2);
-    dump_prefix(offset + 1, lineno);
-    printf("rhs:\n");
-    mrb_parser_dump(mrb, tree->cdr, offset + 2);
-    break;
-
   case NODE_BACK_REF:
     printf("NODE_BACK_REF: $%c\n", node_to_int(tree));
     break;