diff --git a/mrbgems/mruby-compiler/core/codegen.c b/mrbgems/mruby-compiler/core/codegen.c
index b5776b551..43669c5a0 100644
--- a/mrbgems/mruby-compiler/core/codegen.c
+++ b/mrbgems/mruby-compiler/core/codegen.c
@@ -3187,25 +3187,26 @@ static void
 gen_hash_var(codegen_scope *s, node *varnode, int val)
 {
   struct mrb_ast_hash_node *hash = hash_node(varnode);
-  int len = hash->len;
-  struct mrb_ast_node **pairs = hash->pairs;
-  int i;
+  node *pairs = HASH_NODE_PAIRS(hash);
   int regular_pairs = 0;
   mrb_bool update = FALSE;
   mrb_bool first = TRUE;
 
   if (!val) return;
 
-  if (len == 0) {
+  if (!pairs) {
     genop_2(s, OP_HASH, cursp(), 0);
     push();
     return;
   }
 
-  /* Process each key-value pair, handling double-splat (**) cases */
-  for (i = 0; i < len; i++) {
-    struct mrb_ast_node *key = pairs[i * 2];
-    struct mrb_ast_node *value = pairs[i * 2 + 1];
+  /* Process each key-value pair using cons-list iteration, handling double-splat (**) cases */
+  node *current = pairs;
+  while (current) {
+    /* Each current->car is a cons (key . value) */
+    node *pair = current->car;
+    struct mrb_ast_node *key = pair->car;
+    struct mrb_ast_node *value = pair->cdr;
 
     /* Check if this is a double-splat (**kwargs) */
     if (node_to_sym(key) == MRB_OPSYM_2(s->mrb, pow)) {
@@ -3249,6 +3250,8 @@ gen_hash_var(codegen_scope *s, node *varnode, int val)
       regular_pairs++;
     }
     first = FALSE;
+
+    current = current->cdr;
   }
 
   /* Handle any remaining regular pairs */
diff --git a/mrbgems/mruby-compiler/core/node.h b/mrbgems/mruby-compiler/core/node.h
index 8c55c4783..f9721a988 100644
--- a/mrbgems/mruby-compiler/core/node.h
+++ b/mrbgems/mruby-compiler/core/node.h
@@ -225,13 +225,10 @@ struct mrb_ast_array_node {
   struct mrb_ast_node *elements;       /* Original elements list */
 };
 
-/* Variable-sized hash node with inline key-value storage */
+/* Variable-sized hash node - revert to original cons list approach */
 struct mrb_ast_hash_node {
-  struct mrb_ast_var_header header;  /* 8 bytes */
-  uint16_t len;                      /* Number of key-value pairs */
-  uint16_t flags;                    /* Hash-specific flags */
-  /* Interleaved key-value pairs: key0, value0, key1, value1, ... */
-  struct mrb_ast_node *pairs[];      /* Flexible array for key-value pairs */
+  struct mrb_ast_var_header header;    /* 8 bytes */
+  struct mrb_ast_node *pairs;          /* Original pairs list */
 };
 
 /* Phase 3 Variable Node Structures - Control Flow */
@@ -447,7 +444,6 @@ struct mrb_ast_super_node {
 
 #define ARRAY_NODE_ELEMENTS(n) (array_node(n)->elements)
 
-#define HASH_NODE_LEN(n) (hash_node(n)->len)
 #define HASH_NODE_PAIRS(n) (hash_node(n)->pairs)
 
 /* Phase 3 value access macros */
diff --git a/mrbgems/mruby-compiler/core/parse.y b/mrbgems/mruby-compiler/core/parse.y
index 74b8e039b..df1d5677e 100644
--- a/mrbgems/mruby-compiler/core/parse.y
+++ b/mrbgems/mruby-compiler/core/parse.y
@@ -1015,38 +1015,10 @@ new_splat(parser_state *p, node *a)
 static node*
 new_hash(parser_state *p, node *a)
 {
-  /* Count hash key-value pairs */
-  uint16_t len = 0;
-  node *pair_iter = a;
-  while (pair_iter) {
-    len++;
-    pair_iter = pair_iter->cdr;
-  }
+  struct mrb_ast_hash_node *n = (struct mrb_ast_hash_node*)parser_alloc_var(p, sizeof(struct mrb_ast_hash_node), SIZE_CLASS_MEDIUM);
 
-  /* Calculate total size needed */
-  size_t base_size = sizeof(struct mrb_ast_hash_node);
-  size_t pairs_size = len * 2 * sizeof(struct mrb_ast_node*); /* key and value for each pair */
-  size_t total_size = base_size + pairs_size;
-
-  enum mrb_ast_size_class size_class = size_to_class(total_size);
-
-  struct mrb_ast_hash_node *n = (struct mrb_ast_hash_node*)parser_alloc_var(p, total_size, size_class);
-
-  init_var_header(&n->header, p, NODE_HASH, size_class);
-  n->len = len;
-  n->flags = 0;
-
-  /* Copy key-value pairs into flexible array */
-  pair_iter = a;
-  for (int i = 0; i < len; i++) {
-    if (pair_iter && pair_iter->car) {
-      /* Each pair is a cons (key . value) */
-      node *pair = pair_iter->car;
-      n->pairs[i * 2] = pair->car;     /* key */
-      n->pairs[i * 2 + 1] = pair->cdr; /* value */
-    }
-    pair_iter = pair_iter->cdr;
-  }
+  init_var_header(&n->header, p, NODE_HASH, SIZE_CLASS_MEDIUM);
+  n->pairs = a;
 
   return cons_head((node*)NODE_VARIABLE, (node*)n);
 }
diff --git a/mrbgems/mruby-compiler/core/y.tab.c b/mrbgems/mruby-compiler/core/y.tab.c
index a318d45ac..4f51a5e1b 100644
--- a/mrbgems/mruby-compiler/core/y.tab.c
+++ b/mrbgems/mruby-compiler/core/y.tab.c
@@ -1077,38 +1077,10 @@ new_splat(parser_state *p, node *a)
 static node*
 new_hash(parser_state *p, node *a)
 {
-  /* Count hash key-value pairs */
-  uint16_t len = 0;
-  node *pair_iter = a;
-  while (pair_iter) {
-    len++;
-    pair_iter = pair_iter->cdr;
-  }
+  struct mrb_ast_hash_node *n = (struct mrb_ast_hash_node*)parser_alloc_var(p, sizeof(struct mrb_ast_hash_node), SIZE_CLASS_MEDIUM);
 
-  /* Calculate total size needed */
-  size_t base_size = sizeof(struct mrb_ast_hash_node);
-  size_t pairs_size = len * 2 * sizeof(struct mrb_ast_node*); /* key and value for each pair */
-  size_t total_size = base_size + pairs_size;
-
-  enum mrb_ast_size_class size_class = size_to_class(total_size);
-
-  struct mrb_ast_hash_node *n = (struct mrb_ast_hash_node*)parser_alloc_var(p, total_size, size_class);
-
-  init_var_header(&n->header, p, NODE_HASH, size_class);
-  n->len = len;
-  n->flags = 0;
-
-  /* Copy key-value pairs into flexible array */
-  pair_iter = a;
-  for (int i = 0; i < len; i++) {
-    if (pair_iter && pair_iter->car) {
-      /* Each pair is a cons (key . value) */
-      node *pair = pair_iter->car;
-      n->pairs[i * 2] = pair->car;     /* key */
-      n->pairs[i * 2 + 1] = pair->cdr; /* value */
-    }
-    pair_iter = pair_iter->cdr;
-  }
+  init_var_header(&n->header, p, NODE_HASH, SIZE_CLASS_MEDIUM);
+  n->pairs = a;
 
   return cons_head((node*)NODE_VARIABLE, (node*)n);
 }
@@ -2271,7 +2243,7 @@ prohibit_literals(parser_state *p, node *n)
 /* xxx ----------------------------- */
 
 
-#line 2275 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 2247 "mrbgems/mruby-compiler/core/y.tab.c"
 
 # ifndef YY_CAST
 #  ifdef __cplusplus
@@ -2442,7 +2414,7 @@ extern int yydebug;
 #if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
 union YYSTYPE
 {
-#line 2218 "mrbgems/mruby-compiler/core/parse.y"
+#line 2190 "mrbgems/mruby-compiler/core/parse.y"
 
     node *nd;
     mrb_sym id;
@@ -2450,7 +2422,7 @@ union YYSTYPE
     stack_type stack;
     const struct vtable *vars;
 
-#line 2454 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 2426 "mrbgems/mruby-compiler/core/y.tab.c"
 
 };
 typedef union YYSTYPE YYSTYPE;
@@ -3209,69 +3181,69 @@ static const yytype_uint8 yytranslate[] =
 /* YYRLINE[YYN] -- Source line where rule number YYN was defined.  */
 static const yytype_int16 yyrline[] =
 {
-       0,  2389,  2389,  2389,  2399,  2405,  2409,  2413,  2417,  2423,
-    2425,  2424,  2438,  2464,  2470,  2474,  2478,  2484,  2490,  2490,
-    2494,  2498,  2502,  2506,  2515,  2524,  2528,  2533,  2534,  2538,
-    2542,  2546,  2550,  2556,  2559,  2563,  2567,  2571,  2575,  2579,
-    2584,  2588,  2597,  2606,  2615,  2624,  2631,  2632,  2636,  2639,
-    2640,  2644,  2648,  2652,  2656,  2659,  2669,  2668,  2683,  2692,
-    2693,  2696,  2697,  2704,  2703,  2718,  2722,  2727,  2731,  2736,
-    2740,  2745,  2749,  2753,  2757,  2761,  2767,  2771,  2777,  2778,
-    2784,  2788,  2792,  2796,  2800,  2804,  2808,  2812,  2816,  2820,
-    2826,  2827,  2833,  2837,  2843,  2847,  2853,  2857,  2861,  2865,
-    2869,  2873,  2879,  2885,  2892,  2896,  2900,  2904,  2908,  2912,
-    2918,  2924,  2929,  2935,  2939,  2942,  2946,  2950,  2957,  2958,
-    2959,  2960,  2965,  2972,  2973,  2976,  2980,  2980,  2986,  2987,
-    2988,  2989,  2990,  2991,  2992,  2993,  2994,  2995,  2996,  2997,
-    2998,  2999,  3000,  3001,  3002,  3003,  3004,  3005,  3006,  3007,
-    3008,  3009,  3010,  3011,  3012,  3013,  3014,  3015,  3018,  3018,
-    3018,  3019,  3019,  3020,  3020,  3020,  3021,  3021,  3021,  3021,
-    3022,  3022,  3022,  3023,  3023,  3023,  3024,  3024,  3024,  3024,
-    3025,  3025,  3025,  3025,  3026,  3026,  3026,  3026,  3027,  3027,
-    3027,  3027,  3028,  3028,  3028,  3028,  3029,  3029,  3032,  3036,
-    3040,  3044,  3048,  3052,  3056,  3061,  3066,  3071,  3075,  3079,
-    3083,  3087,  3091,  3095,  3099,  3103,  3107,  3111,  3115,  3119,
-    3123,  3127,  3131,  3135,  3139,  3143,  3147,  3151,  3155,  3159,
-    3163,  3167,  3171,  3175,  3179,  3183,  3187,  3191,  3195,  3199,
-    3203,  3207,  3211,  3215,  3219,  3228,  3237,  3246,  3255,  3261,
-    3262,  3266,  3270,  3276,  3280,  3287,  3291,  3300,  3317,  3318,
-    3321,  3322,  3323,  3327,  3331,  3337,  3342,  3346,  3350,  3354,
-    3360,  3360,  3371,  3375,  3381,  3385,  3391,  3394,  3399,  3403,
-    3407,  3412,  3416,  3422,  3427,  3431,  3437,  3438,  3442,  3446,
-    3447,  3448,  3449,  3450,  3455,  3454,  3466,  3470,  3465,  3475,
-    3475,  3479,  3483,  3487,  3491,  3495,  3499,  3503,  3507,  3511,
-    3515,  3519,  3520,  3526,  3533,  3525,  3546,  3554,  3562,  3562,
-    3562,  3569,  3569,  3569,  3576,  3582,  3587,  3589,  3586,  3598,
-    3596,  3614,  3619,  3612,  3636,  3634,  3650,  3660,  3671,  3675,
-    3679,  3683,  3689,  3696,  3697,  3698,  3701,  3702,  3705,  3706,
-    3714,  3715,  3721,  3725,  3728,  3732,  3736,  3740,  3745,  3749,
-    3753,  3757,  3763,  3762,  3772,  3776,  3780,  3784,  3790,  3795,
-    3800,  3804,  3808,  3812,  3816,  3820,  3824,  3828,  3832,  3836,
-    3840,  3844,  3848,  3852,  3856,  3862,  3867,  3874,  3874,  3878,
-    3883,  3889,  3893,  3899,  3900,  3903,  3908,  3911,  3915,  3921,
-    3925,  3932,  3931,  3948,  3953,  3957,  3962,  3969,  3973,  3977,
-    3981,  3985,  3989,  3993,  3997,  4001,  4008,  4007,  4022,  4021,
-    4037,  4045,  4054,  4057,  4064,  4067,  4071,  4072,  4075,  4079,
-    4082,  4086,  4089,  4090,  4091,  4092,  4095,  4096,  4102,  4107,
-    4112,  4117,  4123,  4124,  4130,  4136,  4135,  4147,  4151,  4157,
-    4161,  4167,  4176,  4187,  4190,  4191,  4194,  4200,  4206,  4207,
-    4210,  4217,  4216,  4231,  4235,  4243,  4247,  4259,  4266,  4273,
-    4274,  4275,  4276,  4277,  4281,  4287,  4291,  4299,  4300,  4301,
-    4305,  4311,  4315,  4319,  4323,  4327,  4333,  4337,  4343,  4347,
-    4351,  4355,  4359,  4363,  4367,  4375,  4382,  4388,  4389,  4393,
-    4397,  4396,  4413,  4414,  4417,  4423,  4427,  4433,  4434,  4438,
-    4442,  4448,  4452,  4458,  4464,  4471,  4477,  4484,  4488,  4494,
-    4498,  4504,  4505,  4508,  4512,  4518,  4522,  4526,  4530,  4536,
-    4541,  4546,  4550,  4554,  4558,  4562,  4566,  4570,  4574,  4578,
-    4582,  4586,  4590,  4594,  4598,  4603,  4609,  4614,  4619,  4624,
-    4629,  4636,  4640,  4647,  4652,  4651,  4663,  4667,  4673,  4681,
-    4689,  4697,  4701,  4707,  4711,  4717,  4718,  4721,  4726,  4733,
-    4734,  4737,  4741,  4747,  4751,  4757,  4763,  4763,  4770,  4771,
-    4777,  4781,  4787,  4793,  4798,  4802,  4807,  4812,  4828,  4833,
-    4839,  4840,  4841,  4844,  4845,  4846,  4847,  4850,  4851,  4852,
-    4855,  4856,  4859,  4863,  4869,  4870,  4876,  4877,  4880,  4881,
-    4884,  4887,  4888,  4889,  4892,  4893,  4896,  4901,  4904,  4905,
-    4909
+       0,  2361,  2361,  2361,  2371,  2377,  2381,  2385,  2389,  2395,
+    2397,  2396,  2410,  2436,  2442,  2446,  2450,  2456,  2462,  2462,
+    2466,  2470,  2474,  2478,  2487,  2496,  2500,  2505,  2506,  2510,
+    2514,  2518,  2522,  2528,  2531,  2535,  2539,  2543,  2547,  2551,
+    2556,  2560,  2569,  2578,  2587,  2596,  2603,  2604,  2608,  2611,
+    2612,  2616,  2620,  2624,  2628,  2631,  2641,  2640,  2655,  2664,
+    2665,  2668,  2669,  2676,  2675,  2690,  2694,  2699,  2703,  2708,
+    2712,  2717,  2721,  2725,  2729,  2733,  2739,  2743,  2749,  2750,
+    2756,  2760,  2764,  2768,  2772,  2776,  2780,  2784,  2788,  2792,
+    2798,  2799,  2805,  2809,  2815,  2819,  2825,  2829,  2833,  2837,
+    2841,  2845,  2851,  2857,  2864,  2868,  2872,  2876,  2880,  2884,
+    2890,  2896,  2901,  2907,  2911,  2914,  2918,  2922,  2929,  2930,
+    2931,  2932,  2937,  2944,  2945,  2948,  2952,  2952,  2958,  2959,
+    2960,  2961,  2962,  2963,  2964,  2965,  2966,  2967,  2968,  2969,
+    2970,  2971,  2972,  2973,  2974,  2975,  2976,  2977,  2978,  2979,
+    2980,  2981,  2982,  2983,  2984,  2985,  2986,  2987,  2990,  2990,
+    2990,  2991,  2991,  2992,  2992,  2992,  2993,  2993,  2993,  2993,
+    2994,  2994,  2994,  2995,  2995,  2995,  2996,  2996,  2996,  2996,
+    2997,  2997,  2997,  2997,  2998,  2998,  2998,  2998,  2999,  2999,
+    2999,  2999,  3000,  3000,  3000,  3000,  3001,  3001,  3004,  3008,
+    3012,  3016,  3020,  3024,  3028,  3033,  3038,  3043,  3047,  3051,
+    3055,  3059,  3063,  3067,  3071,  3075,  3079,  3083,  3087,  3091,
+    3095,  3099,  3103,  3107,  3111,  3115,  3119,  3123,  3127,  3131,
+    3135,  3139,  3143,  3147,  3151,  3155,  3159,  3163,  3167,  3171,
+    3175,  3179,  3183,  3187,  3191,  3200,  3209,  3218,  3227,  3233,
+    3234,  3238,  3242,  3248,  3252,  3259,  3263,  3272,  3289,  3290,
+    3293,  3294,  3295,  3299,  3303,  3309,  3314,  3318,  3322,  3326,
+    3332,  3332,  3343,  3347,  3353,  3357,  3363,  3366,  3371,  3375,
+    3379,  3384,  3388,  3394,  3399,  3403,  3409,  3410,  3414,  3418,
+    3419,  3420,  3421,  3422,  3427,  3426,  3438,  3442,  3437,  3447,
+    3447,  3451,  3455,  3459,  3463,  3467,  3471,  3475,  3479,  3483,
+    3487,  3491,  3492,  3498,  3505,  3497,  3518,  3526,  3534,  3534,
+    3534,  3541,  3541,  3541,  3548,  3554,  3559,  3561,  3558,  3570,
+    3568,  3586,  3591,  3584,  3608,  3606,  3622,  3632,  3643,  3647,
+    3651,  3655,  3661,  3668,  3669,  3670,  3673,  3674,  3677,  3678,
+    3686,  3687,  3693,  3697,  3700,  3704,  3708,  3712,  3717,  3721,
+    3725,  3729,  3735,  3734,  3744,  3748,  3752,  3756,  3762,  3767,
+    3772,  3776,  3780,  3784,  3788,  3792,  3796,  3800,  3804,  3808,
+    3812,  3816,  3820,  3824,  3828,  3834,  3839,  3846,  3846,  3850,
+    3855,  3861,  3865,  3871,  3872,  3875,  3880,  3883,  3887,  3893,
+    3897,  3904,  3903,  3920,  3925,  3929,  3934,  3941,  3945,  3949,
+    3953,  3957,  3961,  3965,  3969,  3973,  3980,  3979,  3994,  3993,
+    4009,  4017,  4026,  4029,  4036,  4039,  4043,  4044,  4047,  4051,
+    4054,  4058,  4061,  4062,  4063,  4064,  4067,  4068,  4074,  4079,
+    4084,  4089,  4095,  4096,  4102,  4108,  4107,  4119,  4123,  4129,
+    4133,  4139,  4148,  4159,  4162,  4163,  4166,  4172,  4178,  4179,
+    4182,  4189,  4188,  4203,  4207,  4215,  4219,  4231,  4238,  4245,
+    4246,  4247,  4248,  4249,  4253,  4259,  4263,  4271,  4272,  4273,
+    4277,  4283,  4287,  4291,  4295,  4299,  4305,  4309,  4315,  4319,
+    4323,  4327,  4331,  4335,  4339,  4347,  4354,  4360,  4361,  4365,
+    4369,  4368,  4385,  4386,  4389,  4395,  4399,  4405,  4406,  4410,
+    4414,  4420,  4424,  4430,  4436,  4443,  4449,  4456,  4460,  4466,
+    4470,  4476,  4477,  4480,  4484,  4490,  4494,  4498,  4502,  4508,
+    4513,  4518,  4522,  4526,  4530,  4534,  4538,  4542,  4546,  4550,
+    4554,  4558,  4562,  4566,  4570,  4575,  4581,  4586,  4591,  4596,
+    4601,  4608,  4612,  4619,  4624,  4623,  4635,  4639,  4645,  4653,
+    4661,  4669,  4673,  4679,  4683,  4689,  4690,  4693,  4698,  4705,
+    4706,  4709,  4713,  4719,  4723,  4729,  4735,  4735,  4742,  4743,
+    4749,  4753,  4759,  4765,  4770,  4774,  4779,  4784,  4800,  4805,
+    4811,  4812,  4813,  4816,  4817,  4818,  4819,  4822,  4823,  4824,
+    4827,  4828,  4831,  4835,  4841,  4842,  4848,  4849,  4852,  4853,
+    4856,  4859,  4860,  4861,  4864,  4865,  4868,  4873,  4876,  4877,
+    4881
 };
 #endif
 
@@ -7248,7 +7220,7 @@ YYLTYPE yylloc = yyloc_default;
 
 
 
-#line 7252 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7224 "mrbgems/mruby-compiler/core/y.tab.c"
 
   yylsp[0] = yylloc;
   goto yysetstate;
@@ -7461,84 +7433,84 @@ yyreduce:
   switch (yyn)
     {
   case 2: /* $@1: %empty  */
-#line 2389 "mrbgems/mruby-compiler/core/parse.y"
+#line 2361 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->lstate = EXPR_BEG;
                       if (!p->locals) p->locals = cons(0,0);
                     }
-#line 7470 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7442 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 3: /* program: $@1 top_compstmt  */
-#line 2394 "mrbgems/mruby-compiler/core/parse.y"
+#line 2366 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->tree = new_scope(p, (yyvsp[0].nd));
                     }
-#line 7478 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7450 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 4: /* top_compstmt: top_stmts opt_terms  */
-#line 2400 "mrbgems/mruby-compiler/core/parse.y"
+#line 2372 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 7486 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7458 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 5: /* top_stmts: none  */
-#line 2406 "mrbgems/mruby-compiler/core/parse.y"
+#line 2378 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_stmts(p, 0);
                     }
-#line 7494 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7466 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 6: /* top_stmts: top_stmt  */
-#line 2410 "mrbgems/mruby-compiler/core/parse.y"
+#line 2382 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_stmts(p, (yyvsp[0].nd));
                     }
-#line 7502 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7474 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 7: /* top_stmts: top_stmts terms top_stmt  */
-#line 2414 "mrbgems/mruby-compiler/core/parse.y"
+#line 2386 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-2].nd), newline_node((yyvsp[0].nd)));
                     }
-#line 7510 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7482 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 8: /* top_stmts: error top_stmt  */
-#line 2418 "mrbgems/mruby-compiler/core/parse.y"
+#line 2390 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_stmts(p, 0);
                     }
-#line 7518 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7490 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 10: /* @2: %empty  */
-#line 2425 "mrbgems/mruby-compiler/core/parse.y"
+#line 2397 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = local_switch(p);
                       nvars_block(p);
                     }
-#line 7527 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7499 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 11: /* top_stmt: "'BEGIN'" @2 '{' top_compstmt '}'  */
-#line 2430 "mrbgems/mruby-compiler/core/parse.y"
+#line 2402 "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 7538 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7510 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 12: /* bodystmt: compstmt opt_rescue opt_else opt_ensure  */
-#line 2442 "mrbgems/mruby-compiler/core/parse.y"
+#line 2414 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if ((yyvsp[-2].nd)) {
                         (yyval.nd) = new_rescue(p, (yyvsp[-3].nd), (yyvsp[-2].nd), (yyvsp[-1].nd));
@@ -7559,91 +7531,91 @@ yyreduce:
                         }
                       }
                     }
-#line 7563 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7535 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 13: /* compstmt: stmts opt_terms  */
-#line 2465 "mrbgems/mruby-compiler/core/parse.y"
+#line 2437 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 7571 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7543 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 14: /* stmts: none  */
-#line 2471 "mrbgems/mruby-compiler/core/parse.y"
+#line 2443 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_stmts(p, 0);
                     }
-#line 7579 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7551 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 15: /* stmts: stmt  */
-#line 2475 "mrbgems/mruby-compiler/core/parse.y"
+#line 2447 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_stmts(p, (yyvsp[0].nd));
                     }
-#line 7587 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7559 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 16: /* stmts: stmts terms stmt  */
-#line 2479 "mrbgems/mruby-compiler/core/parse.y"
+#line 2451 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       /* Update the cons-list inside the existing variable-sized node */
                       STMTS_NODE_STMTS((yyvsp[-2].nd)->cdr) = push(STMTS_NODE_STMTS((yyvsp[-2].nd)->cdr), newline_node((yyvsp[0].nd)));
                       (yyval.nd) = (yyvsp[-2].nd);
                     }
-#line 7597 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7569 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 17: /* stmts: error stmt  */
-#line 2485 "mrbgems/mruby-compiler/core/parse.y"
+#line 2457 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_stmts(p, (yyvsp[0].nd));
                     }
-#line 7605 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7577 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 18: /* $@3: %empty  */
-#line 2490 "mrbgems/mruby-compiler/core/parse.y"
+#line 2462 "mrbgems/mruby-compiler/core/parse.y"
                                      {p->lstate = EXPR_FNAME;}
-#line 7611 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7583 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 19: /* stmt: "'alias'" fsym $@3 fsym  */
-#line 2491 "mrbgems/mruby-compiler/core/parse.y"
+#line 2463 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_alias(p, (yyvsp[-2].id), (yyvsp[0].id));
                     }
-#line 7619 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7591 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 20: /* stmt: "'undef'" undef_list  */
-#line 2495 "mrbgems/mruby-compiler/core/parse.y"
+#line 2467 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_undef(p, (yyvsp[0].nd));
                     }
-#line 7627 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7599 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 21: /* stmt: stmt "'if' modifier" expr_value  */
-#line 2499 "mrbgems/mruby-compiler/core/parse.y"
+#line 2471 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_if(p, cond((yyvsp[0].nd)), (yyvsp[-2].nd), 0);
                     }
-#line 7635 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7607 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 22: /* stmt: stmt "'unless' modifier" expr_value  */
-#line 2503 "mrbgems/mruby-compiler/core/parse.y"
+#line 2475 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_if(p, cond((yyvsp[0].nd)), 0, (yyvsp[-2].nd));
                     }
-#line 7643 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7615 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 23: /* stmt: stmt "'while' modifier" expr_value  */
-#line 2507 "mrbgems/mruby-compiler/core/parse.y"
+#line 2479 "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));
@@ -7652,11 +7624,11 @@ yyreduce:
                         (yyval.nd) = new_while(p, cond((yyvsp[0].nd)), (yyvsp[-2].nd));
                       }
                     }
-#line 7656 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7628 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 24: /* stmt: stmt "'until' modifier" expr_value  */
-#line 2516 "mrbgems/mruby-compiler/core/parse.y"
+#line 2488 "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));
@@ -7665,127 +7637,127 @@ yyreduce:
                         (yyval.nd) = new_until(p, cond((yyvsp[0].nd)), (yyvsp[-2].nd));
                       }
                     }
-#line 7669 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7641 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 25: /* stmt: stmt "'rescue' modifier" stmt  */
-#line 2525 "mrbgems/mruby-compiler/core/parse.y"
+#line 2497 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_mod_rescue(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 7677 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7649 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 26: /* stmt: "'END'" '{' compstmt '}'  */
-#line 2529 "mrbgems/mruby-compiler/core/parse.y"
+#line 2501 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[-3]), p, "END not supported");
                       (yyval.nd) = new_postexe(p, (yyvsp[-1].nd));
                     }
-#line 7686 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7658 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 28: /* stmt: mlhs '=' command_call  */
-#line 2535 "mrbgems/mruby-compiler/core/parse.y"
+#line 2507 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_masgn(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 7694 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7666 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 29: /* stmt: lhs '=' mrhs  */
-#line 2539 "mrbgems/mruby-compiler/core/parse.y"
+#line 2511 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_asgn(p, (yyvsp[-2].nd), new_array(p, (yyvsp[0].nd)));
                     }
-#line 7702 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7674 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 30: /* stmt: mlhs '=' arg  */
-#line 2543 "mrbgems/mruby-compiler/core/parse.y"
+#line 2515 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_masgn(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 7710 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7682 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 31: /* stmt: mlhs '=' mrhs  */
-#line 2547 "mrbgems/mruby-compiler/core/parse.y"
+#line 2519 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_masgn(p, (yyvsp[-2].nd), new_array(p, (yyvsp[0].nd)));
                     }
-#line 7718 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7690 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 32: /* stmt: arg "=>" "local variable or method"  */
-#line 2551 "mrbgems/mruby-compiler/core/parse.y"
+#line 2523 "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 7728 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7700 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 34: /* command_asgn: lhs '=' command_rhs  */
-#line 2560 "mrbgems/mruby-compiler/core/parse.y"
+#line 2532 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_asgn(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 7736 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7708 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 35: /* command_asgn: var_lhs tOP_ASGN command_rhs  */
-#line 2564 "mrbgems/mruby-compiler/core/parse.y"
+#line 2536 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_op_asgn(p, (yyvsp[-2].nd), (yyvsp[-1].id), (yyvsp[0].nd));
                     }
-#line 7744 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7716 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 36: /* command_asgn: primary_value '[' opt_call_args ']' tOP_ASGN command_rhs  */
-#line 2568 "mrbgems/mruby-compiler/core/parse.y"
+#line 2540 "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 7752 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7724 "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 2572 "mrbgems/mruby-compiler/core/parse.y"
+#line 2544 "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 7760 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7732 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 38: /* command_asgn: primary_value call_op "constant" tOP_ASGN command_rhs  */
-#line 2576 "mrbgems/mruby-compiler/core/parse.y"
+#line 2548 "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 7768 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7740 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 39: /* command_asgn: primary_value "::" "constant" tOP_ASGN command_call  */
-#line 2580 "mrbgems/mruby-compiler/core/parse.y"
+#line 2552 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[-4]), p, "constant re-assignment");
                       (yyval.nd) = 0;
                     }
-#line 7777 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7749 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 40: /* command_asgn: primary_value "::" "local variable or method" tOP_ASGN command_rhs  */
-#line 2585 "mrbgems/mruby-compiler/core/parse.y"
+#line 2557 "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 7785 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7757 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 41: /* command_asgn: defn_head f_opt_arglist_paren '=' command  */
-#line 2589 "mrbgems/mruby-compiler/core/parse.y"
+#line 2561 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-3].nd);
                       endless_method_name(p, (yyvsp[-3].nd));
@@ -7794,11 +7766,11 @@ yyreduce:
                       nvars_unnest(p);
                       p->in_def--;
                     }
-#line 7798 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7770 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 42: /* command_asgn: defn_head f_opt_arglist_paren '=' command "'rescue' modifier" arg  */
-#line 2598 "mrbgems/mruby-compiler/core/parse.y"
+#line 2570 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-5].nd);
                       endless_method_name(p, (yyvsp[-5].nd));
@@ -7807,11 +7779,11 @@ yyreduce:
                       nvars_unnest(p);
                       p->in_def--;
                     }
-#line 7811 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7783 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 43: /* command_asgn: defs_head f_opt_arglist_paren '=' command  */
-#line 2607 "mrbgems/mruby-compiler/core/parse.y"
+#line 2579 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-3].nd);
                       void_expr_error(p, (yyvsp[0].nd));
@@ -7820,11 +7792,11 @@ yyreduce:
                       p->in_def--;
                       p->in_single--;
                     }
-#line 7824 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7796 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 44: /* command_asgn: defs_head f_opt_arglist_paren '=' command "'rescue' modifier" arg  */
-#line 2616 "mrbgems/mruby-compiler/core/parse.y"
+#line 2588 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-5].nd);
                       void_expr_error(p, (yyvsp[-2].nd));
@@ -7833,79 +7805,79 @@ yyreduce:
                       p->in_def--;
                       p->in_single--;
                     }
-#line 7837 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7809 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 45: /* command_asgn: backref tOP_ASGN command_rhs  */
-#line 2625 "mrbgems/mruby-compiler/core/parse.y"
+#line 2597 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       backref_error(p, (yyvsp[-2].nd));
                       (yyval.nd) = new_stmts(p, 0);
                     }
-#line 7846 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7818 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 47: /* command_rhs: command_call "'rescue' modifier" stmt  */
-#line 2633 "mrbgems/mruby-compiler/core/parse.y"
+#line 2605 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_mod_rescue(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 7854 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7826 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 50: /* expr: expr "'and'" expr  */
-#line 2641 "mrbgems/mruby-compiler/core/parse.y"
+#line 2613 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_and(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 7862 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7834 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 51: /* expr: expr "'or'" expr  */
-#line 2645 "mrbgems/mruby-compiler/core/parse.y"
+#line 2617 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_or(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 7870 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7842 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 52: /* expr: "'not'" opt_nl expr  */
-#line 2649 "mrbgems/mruby-compiler/core/parse.y"
+#line 2621 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_uni_op(p, cond((yyvsp[0].nd)), "!");
                     }
-#line 7878 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7850 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 53: /* expr: '!' command_call  */
-#line 2653 "mrbgems/mruby-compiler/core/parse.y"
+#line 2625 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_uni_op(p, cond((yyvsp[0].nd)), "!");
                     }
-#line 7886 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7858 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 55: /* defn_head: "'def'" fname  */
-#line 2660 "mrbgems/mruby-compiler/core/parse.y"
+#line 2632 "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 7897 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7869 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 56: /* $@4: %empty  */
-#line 2669 "mrbgems/mruby-compiler/core/parse.y"
+#line 2641 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->lstate = EXPR_FNAME;
                     }
-#line 7905 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7877 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 57: /* defs_head: "'def'" singleton dot_or_colon $@4 fname  */
-#line 2673 "mrbgems/mruby-compiler/core/parse.y"
+#line 2645 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_sdef(p, (yyvsp[-3].nd), (yyvsp[0].id));
                       p->cmdarg_stack = 0;
@@ -7914,1054 +7886,1054 @@ yyreduce:
                       nvars_block(p);
                       p->lstate = EXPR_ENDFN; /* force for args */
                     }
-#line 7918 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7890 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 58: /* expr_value: expr  */
-#line 2684 "mrbgems/mruby-compiler/core/parse.y"
+#line 2656 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if (!(yyvsp[0].nd)) (yyval.nd) = new_nil(p);
                       else {
                         (yyval.nd) = (yyvsp[0].nd);
                       }
                     }
-#line 7929 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7901 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 62: /* block_command: block_call call_op2 operation2 command_args  */
-#line 2698 "mrbgems/mruby-compiler/core/parse.y"
+#line 2670 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), (yyvsp[-1].id), (yyvsp[0].nd), (yyvsp[-2].num));
                     }
-#line 7937 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7909 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 63: /* $@5: %empty  */
-#line 2704 "mrbgems/mruby-compiler/core/parse.y"
+#line 2676 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_nest(p);
                       nvars_nest(p);
                     }
-#line 7946 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7918 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 64: /* cmd_brace_block: "{" $@5 opt_block_param compstmt '}'  */
-#line 2711 "mrbgems/mruby-compiler/core/parse.y"
+#line 2683 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_block(p, (yyvsp[-2].nd), (yyvsp[-1].nd));
                       local_unnest(p);
                       nvars_unnest(p);
                     }
-#line 7956 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7928 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 65: /* command: operation command_args  */
-#line 2719 "mrbgems/mruby-compiler/core/parse.y"
+#line 2691 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_fcall(p, (yyvsp[-1].id), (yyvsp[0].nd));
                     }
-#line 7964 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7936 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 66: /* command: operation command_args cmd_brace_block  */
-#line 2723 "mrbgems/mruby-compiler/core/parse.y"
+#line 2695 "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 7973 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7945 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 67: /* command: primary_value call_op operation2 command_args  */
-#line 2728 "mrbgems/mruby-compiler/core/parse.y"
+#line 2700 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), (yyvsp[-1].id), (yyvsp[0].nd), (yyvsp[-2].num));
                     }
-#line 7981 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7953 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 68: /* command: primary_value call_op operation2 command_args cmd_brace_block  */
-#line 2732 "mrbgems/mruby-compiler/core/parse.y"
+#line 2704 "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 7990 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7962 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 69: /* command: primary_value "::" operation2 command_args  */
-#line 2737 "mrbgems/mruby-compiler/core/parse.y"
+#line 2709 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), (yyvsp[-1].id), (yyvsp[0].nd), tCOLON2);
                     }
-#line 7998 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7970 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 70: /* command: primary_value "::" operation2 command_args cmd_brace_block  */
-#line 2741 "mrbgems/mruby-compiler/core/parse.y"
+#line 2713 "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 8007 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7979 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 71: /* command: "'super'" command_args  */
-#line 2746 "mrbgems/mruby-compiler/core/parse.y"
+#line 2718 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_super(p, (yyvsp[0].nd));
                     }
-#line 8015 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7987 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 72: /* command: "'yield'" command_args  */
-#line 2750 "mrbgems/mruby-compiler/core/parse.y"
+#line 2722 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_yield(p, (yyvsp[0].nd));
                     }
-#line 8023 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 7995 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 73: /* command: "'return'" call_args  */
-#line 2754 "mrbgems/mruby-compiler/core/parse.y"
+#line 2726 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_return(p, ret_args(p, (yyvsp[0].nd)));
                     }
-#line 8031 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8003 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 74: /* command: "'break'" call_args  */
-#line 2758 "mrbgems/mruby-compiler/core/parse.y"
+#line 2730 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_break(p, ret_args(p, (yyvsp[0].nd)));
                     }
-#line 8039 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8011 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 75: /* command: "'next'" call_args  */
-#line 2762 "mrbgems/mruby-compiler/core/parse.y"
+#line 2734 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_next(p, ret_args(p, (yyvsp[0].nd)));
                     }
-#line 8047 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8019 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 76: /* mlhs: mlhs_basic  */
-#line 2768 "mrbgems/mruby-compiler/core/parse.y"
+#line 2740 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 8055 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8027 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 77: /* mlhs: tLPAREN mlhs_inner rparen  */
-#line 2772 "mrbgems/mruby-compiler/core/parse.y"
+#line 2744 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 8063 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8035 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 79: /* mlhs_inner: tLPAREN mlhs_inner rparen  */
-#line 2779 "mrbgems/mruby-compiler/core/parse.y"
+#line 2751 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 8071 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8043 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 80: /* mlhs_basic: mlhs_list  */
-#line 2785 "mrbgems/mruby-compiler/core/parse.y"
+#line 2757 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 8079 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8051 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 81: /* mlhs_basic: mlhs_list mlhs_item  */
-#line 2789 "mrbgems/mruby-compiler/core/parse.y"
+#line 2761 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1(push((yyvsp[-1].nd),(yyvsp[0].nd)));
                     }
-#line 8087 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8059 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 82: /* mlhs_basic: mlhs_list "*" mlhs_node  */
-#line 2793 "mrbgems/mruby-compiler/core/parse.y"
+#line 2765 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list2((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 8095 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8067 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 83: /* mlhs_basic: mlhs_list "*" mlhs_node ',' mlhs_post  */
-#line 2797 "mrbgems/mruby-compiler/core/parse.y"
+#line 2769 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3((yyvsp[-4].nd), (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 8103 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8075 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 84: /* mlhs_basic: mlhs_list "*"  */
-#line 2801 "mrbgems/mruby-compiler/core/parse.y"
+#line 2773 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list2((yyvsp[-1].nd), new_nil(p));
                     }
-#line 8111 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8083 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 85: /* mlhs_basic: mlhs_list "*" ',' mlhs_post  */
-#line 2805 "mrbgems/mruby-compiler/core/parse.y"
+#line 2777 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3((yyvsp[-3].nd), new_nil(p), (yyvsp[0].nd));
                     }
-#line 8119 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8091 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 86: /* mlhs_basic: "*" mlhs_node  */
-#line 2809 "mrbgems/mruby-compiler/core/parse.y"
+#line 2781 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list2(0, (yyvsp[0].nd));
                     }
-#line 8127 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8099 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 87: /* mlhs_basic: "*" mlhs_node ',' mlhs_post  */
-#line 2813 "mrbgems/mruby-compiler/core/parse.y"
+#line 2785 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3(0, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 8135 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8107 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 88: /* mlhs_basic: "*"  */
-#line 2817 "mrbgems/mruby-compiler/core/parse.y"
+#line 2789 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list2(0, new_nil(p));
                     }
-#line 8143 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8115 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 89: /* mlhs_basic: "*" ',' mlhs_post  */
-#line 2821 "mrbgems/mruby-compiler/core/parse.y"
+#line 2793 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3(0, new_nil(p), (yyvsp[0].nd));
                     }
-#line 8151 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8123 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 91: /* mlhs_item: tLPAREN mlhs_inner rparen  */
-#line 2828 "mrbgems/mruby-compiler/core/parse.y"
+#line 2800 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_masgn(p, (yyvsp[-1].nd), NULL);
                     }
-#line 8159 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8131 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 92: /* mlhs_list: mlhs_item ','  */
-#line 2834 "mrbgems/mruby-compiler/core/parse.y"
+#line 2806 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1((yyvsp[-1].nd));
                     }
-#line 8167 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8139 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 93: /* mlhs_list: mlhs_list mlhs_item ','  */
-#line 2838 "mrbgems/mruby-compiler/core/parse.y"
+#line 2810 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[-1].nd));
                     }
-#line 8175 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8147 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 94: /* mlhs_post: mlhs_item  */
-#line 2844 "mrbgems/mruby-compiler/core/parse.y"
+#line 2816 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 8183 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8155 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 95: /* mlhs_post: mlhs_list mlhs_item  */
-#line 2848 "mrbgems/mruby-compiler/core/parse.y"
+#line 2820 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 8191 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8163 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 96: /* mlhs_node: variable  */
-#line 2854 "mrbgems/mruby-compiler/core/parse.y"
+#line 2826 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       assignable(p, (yyvsp[0].nd));
                     }
-#line 8199 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8171 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 97: /* mlhs_node: primary_value '[' opt_call_args ']'  */
-#line 2858 "mrbgems/mruby-compiler/core/parse.y"
+#line 2830 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), intern_op(aref), (yyvsp[-1].nd), '.');
                     }
-#line 8207 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8179 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 98: /* mlhs_node: primary_value call_op "local variable or method"  */
-#line 2862 "mrbgems/mruby-compiler/core/parse.y"
+#line 2834 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-2].nd), (yyvsp[0].id), 0, (yyvsp[-1].num));
                     }
-#line 8215 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8187 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 99: /* mlhs_node: primary_value "::" "local variable or method"  */
-#line 2866 "mrbgems/mruby-compiler/core/parse.y"
+#line 2838 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-2].nd), (yyvsp[0].id), 0, tCOLON2);
                     }
+#line 8195 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 100: /* mlhs_node: primary_value call_op "constant"  */
+#line 2842 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_call(p, (yyvsp[-2].nd), (yyvsp[0].id), 0, (yyvsp[-1].num));
+                    }
+#line 8203 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 101: /* mlhs_node: primary_value "::" "constant"  */
+#line 2846 "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 8213 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 102: /* mlhs_node: tCOLON3 "constant"  */
+#line 2852 "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 8223 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 100: /* mlhs_node: primary_value call_op "constant"  */
-#line 2870 "mrbgems/mruby-compiler/core/parse.y"
+  case 103: /* mlhs_node: backref  */
+#line 2858 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      backref_error(p, (yyvsp[0].nd));
+                      (yyval.nd) = 0;
+                    }
+#line 8232 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 104: /* lhs: variable  */
+#line 2865 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      assignable(p, (yyvsp[0].nd));
+                    }
+#line 8240 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 105: /* lhs: primary_value '[' opt_call_args ']'  */
+#line 2869 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_call(p, (yyvsp[-3].nd), intern_op(aref), (yyvsp[-1].nd), '.');
+                    }
+#line 8248 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 106: /* lhs: primary_value call_op "local variable or method"  */
+#line 2873 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-2].nd), (yyvsp[0].id), 0, (yyvsp[-1].num));
                     }
-#line 8231 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8256 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 101: /* mlhs_node: primary_value "::" "constant"  */
-#line 2874 "mrbgems/mruby-compiler/core/parse.y"
+  case 107: /* lhs: primary_value "::" "local variable or method"  */
+#line 2877 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_call(p, (yyvsp[-2].nd), (yyvsp[0].id), 0, tCOLON2);
+                    }
+#line 8264 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 108: /* lhs: primary_value call_op "constant"  */
+#line 2881 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_call(p, (yyvsp[-2].nd), (yyvsp[0].id), 0, (yyvsp[-1].num));
+                    }
+#line 8272 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 109: /* lhs: primary_value "::" "constant"  */
+#line 2885 "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 8241 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8282 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 102: /* mlhs_node: tCOLON3 "constant"  */
-#line 2880 "mrbgems/mruby-compiler/core/parse.y"
+  case 110: /* lhs: tCOLON3 "constant"  */
+#line 2891 "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 8251 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 103: /* mlhs_node: backref  */
-#line 2886 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      backref_error(p, (yyvsp[0].nd));
-                      (yyval.nd) = 0;
-                    }
-#line 8260 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 104: /* lhs: variable  */
-#line 2893 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      assignable(p, (yyvsp[0].nd));
-                    }
-#line 8268 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 105: /* lhs: primary_value '[' opt_call_args ']'  */
-#line 2897 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_call(p, (yyvsp[-3].nd), intern_op(aref), (yyvsp[-1].nd), '.');
-                    }
-#line 8276 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 106: /* lhs: primary_value call_op "local variable or method"  */
-#line 2901 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_call(p, (yyvsp[-2].nd), (yyvsp[0].id), 0, (yyvsp[-1].num));
-                    }
-#line 8284 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 107: /* lhs: primary_value "::" "local variable or method"  */
-#line 2905 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_call(p, (yyvsp[-2].nd), (yyvsp[0].id), 0, tCOLON2);
-                    }
 #line 8292 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 108: /* lhs: primary_value call_op "constant"  */
-#line 2909 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_call(p, (yyvsp[-2].nd), (yyvsp[0].id), 0, (yyvsp[-1].num));
-                    }
-#line 8300 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 109: /* lhs: primary_value "::" "constant"  */
-#line 2913 "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 8310 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 110: /* lhs: tCOLON3 "constant"  */
-#line 2919 "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 8320 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
   case 111: /* lhs: backref  */
-#line 2925 "mrbgems/mruby-compiler/core/parse.y"
+#line 2897 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       backref_error(p, (yyvsp[0].nd));
                       (yyval.nd) = 0;
                     }
-#line 8329 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8301 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 112: /* lhs: "numbered parameter"  */
-#line 2930 "mrbgems/mruby-compiler/core/parse.y"
+#line 2902 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[0]), p, "can't assign to numbered parameter");
                     }
-#line 8337 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8309 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 113: /* cname: "local variable or method"  */
-#line 2936 "mrbgems/mruby-compiler/core/parse.y"
+#line 2908 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[0]), p, "class/module name must be CONSTANT");
                     }
-#line 8345 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8317 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 115: /* cpath: tCOLON3 cname  */
-#line 2943 "mrbgems/mruby-compiler/core/parse.y"
+#line 2915 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = cons(int_to_node(1), sym_to_node((yyvsp[0].id)));
                     }
-#line 8353 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8325 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 116: /* cpath: cname  */
-#line 2947 "mrbgems/mruby-compiler/core/parse.y"
+#line 2919 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = cons(int_to_node(0), sym_to_node((yyvsp[0].id)));
                     }
-#line 8361 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8333 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 117: /* cpath: primary_value "::" cname  */
-#line 2951 "mrbgems/mruby-compiler/core/parse.y"
+#line 2923 "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 8370 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8342 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 121: /* fname: op  */
-#line 2961 "mrbgems/mruby-compiler/core/parse.y"
+#line 2933 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->lstate = EXPR_ENDFN;
                       (yyval.id) = (yyvsp[0].id);
                     }
-#line 8379 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8351 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 122: /* fname: reswords  */
-#line 2966 "mrbgems/mruby-compiler/core/parse.y"
+#line 2938 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->lstate = EXPR_ENDFN;
                       (yyval.id) = (yyvsp[0].id);
                     }
-#line 8388 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8360 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 125: /* undef_list: fsym  */
-#line 2977 "mrbgems/mruby-compiler/core/parse.y"
+#line 2949 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = cons(sym_to_node((yyvsp[0].id)), 0);
                     }
-#line 8396 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8368 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 126: /* $@6: %empty  */
-#line 2980 "mrbgems/mruby-compiler/core/parse.y"
+#line 2952 "mrbgems/mruby-compiler/core/parse.y"
                                  {p->lstate = EXPR_FNAME;}
-#line 8402 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8374 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 127: /* undef_list: undef_list ',' $@6 fsym  */
-#line 2981 "mrbgems/mruby-compiler/core/parse.y"
+#line 2953 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-3].nd), sym_to_node((yyvsp[0].id)));
                     }
-#line 8410 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8382 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 128: /* op: '|'  */
-#line 2986 "mrbgems/mruby-compiler/core/parse.y"
+#line 2958 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(or);     }
-#line 8416 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8388 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 129: /* op: '^'  */
-#line 2987 "mrbgems/mruby-compiler/core/parse.y"
+#line 2959 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(xor);    }
-#line 8422 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8394 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 130: /* op: '&'  */
-#line 2988 "mrbgems/mruby-compiler/core/parse.y"
+#line 2960 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(and);    }
-#line 8428 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8400 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 131: /* op: "<=>"  */
-#line 2989 "mrbgems/mruby-compiler/core/parse.y"
+#line 2961 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(cmp);    }
-#line 8434 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8406 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 132: /* op: "=="  */
-#line 2990 "mrbgems/mruby-compiler/core/parse.y"
+#line 2962 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(eq);     }
-#line 8440 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8412 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 133: /* op: "==="  */
-#line 2991 "mrbgems/mruby-compiler/core/parse.y"
+#line 2963 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(eqq);    }
-#line 8446 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8418 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 134: /* op: "=~"  */
-#line 2992 "mrbgems/mruby-compiler/core/parse.y"
+#line 2964 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(match);  }
-#line 8452 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8424 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 135: /* op: "!~"  */
-#line 2993 "mrbgems/mruby-compiler/core/parse.y"
+#line 2965 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(nmatch); }
-#line 8458 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8430 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 136: /* op: '>'  */
-#line 2994 "mrbgems/mruby-compiler/core/parse.y"
+#line 2966 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(gt);     }
-#line 8464 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8436 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 137: /* op: ">="  */
-#line 2995 "mrbgems/mruby-compiler/core/parse.y"
+#line 2967 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(ge);     }
-#line 8470 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8442 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 138: /* op: '<'  */
-#line 2996 "mrbgems/mruby-compiler/core/parse.y"
+#line 2968 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(lt);     }
-#line 8476 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8448 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 139: /* op: "<="  */
-#line 2997 "mrbgems/mruby-compiler/core/parse.y"
+#line 2969 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(le);     }
-#line 8482 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8454 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 140: /* op: "!="  */
-#line 2998 "mrbgems/mruby-compiler/core/parse.y"
+#line 2970 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(neq);    }
-#line 8488 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8460 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 141: /* op: "<<"  */
-#line 2999 "mrbgems/mruby-compiler/core/parse.y"
+#line 2971 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(lshift); }
-#line 8494 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8466 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 142: /* op: ">>"  */
-#line 3000 "mrbgems/mruby-compiler/core/parse.y"
+#line 2972 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(rshift); }
-#line 8500 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8472 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 143: /* op: '+'  */
-#line 3001 "mrbgems/mruby-compiler/core/parse.y"
+#line 2973 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(add);    }
-#line 8506 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8478 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 144: /* op: '-'  */
-#line 3002 "mrbgems/mruby-compiler/core/parse.y"
+#line 2974 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(sub);    }
-#line 8512 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8484 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 145: /* op: '*'  */
-#line 3003 "mrbgems/mruby-compiler/core/parse.y"
+#line 2975 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(mul);    }
-#line 8518 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8490 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 146: /* op: "*"  */
-#line 3004 "mrbgems/mruby-compiler/core/parse.y"
+#line 2976 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(mul);    }
-#line 8524 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8496 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 147: /* op: '/'  */
-#line 3005 "mrbgems/mruby-compiler/core/parse.y"
+#line 2977 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(div);    }
-#line 8530 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8502 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 148: /* op: '%'  */
-#line 3006 "mrbgems/mruby-compiler/core/parse.y"
+#line 2978 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(mod);    }
-#line 8536 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8508 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 149: /* op: tPOW  */
-#line 3007 "mrbgems/mruby-compiler/core/parse.y"
+#line 2979 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(pow);    }
-#line 8542 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8514 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 150: /* op: "**"  */
-#line 3008 "mrbgems/mruby-compiler/core/parse.y"
+#line 2980 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(pow);    }
-#line 8548 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8520 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 151: /* op: '!'  */
-#line 3009 "mrbgems/mruby-compiler/core/parse.y"
+#line 2981 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(not);    }
-#line 8554 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8526 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 152: /* op: '~'  */
-#line 3010 "mrbgems/mruby-compiler/core/parse.y"
+#line 2982 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(neg);    }
-#line 8560 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8532 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 153: /* op: "unary plus"  */
-#line 3011 "mrbgems/mruby-compiler/core/parse.y"
+#line 2983 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(plus);   }
-#line 8566 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8538 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 154: /* op: "unary minus"  */
-#line 3012 "mrbgems/mruby-compiler/core/parse.y"
+#line 2984 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(minus);  }
-#line 8572 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8544 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 155: /* op: tAREF  */
-#line 3013 "mrbgems/mruby-compiler/core/parse.y"
+#line 2985 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(aref);   }
-#line 8578 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8550 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 156: /* op: tASET  */
-#line 3014 "mrbgems/mruby-compiler/core/parse.y"
+#line 2986 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(aset);   }
-#line 8584 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8556 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 157: /* op: '`'  */
-#line 3015 "mrbgems/mruby-compiler/core/parse.y"
+#line 2987 "mrbgems/mruby-compiler/core/parse.y"
                                 { (yyval.id) = intern_op(tick);   }
-#line 8590 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8562 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 198: /* arg: lhs '=' arg_rhs  */
-#line 3033 "mrbgems/mruby-compiler/core/parse.y"
+#line 3005 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_asgn(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 8598 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8570 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 199: /* arg: var_lhs tOP_ASGN arg_rhs  */
-#line 3037 "mrbgems/mruby-compiler/core/parse.y"
+#line 3009 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_op_asgn(p, (yyvsp[-2].nd), (yyvsp[-1].id), (yyvsp[0].nd));
                     }
-#line 8606 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8578 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 200: /* arg: primary_value '[' opt_call_args ']' tOP_ASGN arg_rhs  */
-#line 3041 "mrbgems/mruby-compiler/core/parse.y"
+#line 3013 "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 8614 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8586 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 201: /* arg: primary_value call_op "local variable or method" tOP_ASGN arg_rhs  */
-#line 3045 "mrbgems/mruby-compiler/core/parse.y"
+#line 3017 "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 8622 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8594 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 202: /* arg: primary_value call_op "constant" tOP_ASGN arg_rhs  */
-#line 3049 "mrbgems/mruby-compiler/core/parse.y"
+#line 3021 "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 8630 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8602 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 203: /* arg: primary_value "::" "local variable or method" tOP_ASGN arg_rhs  */
-#line 3053 "mrbgems/mruby-compiler/core/parse.y"
+#line 3025 "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 8638 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8610 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 204: /* arg: primary_value "::" "constant" tOP_ASGN arg_rhs  */
-#line 3057 "mrbgems/mruby-compiler/core/parse.y"
+#line 3029 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[-4]), p, "constant re-assignment");
                       (yyval.nd) = new_stmts(p, 0);
                     }
-#line 8647 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8619 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 205: /* arg: tCOLON3 "constant" tOP_ASGN arg_rhs  */
-#line 3062 "mrbgems/mruby-compiler/core/parse.y"
+#line 3034 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[-3]), p, "constant re-assignment");
                       (yyval.nd) = new_stmts(p, 0);
                     }
-#line 8656 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8628 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 206: /* arg: backref tOP_ASGN arg_rhs  */
-#line 3067 "mrbgems/mruby-compiler/core/parse.y"
+#line 3039 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       backref_error(p, (yyvsp[-2].nd));
                       (yyval.nd) = new_stmts(p, 0);
                     }
-#line 8665 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8637 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 207: /* arg: arg ".." arg  */
-#line 3072 "mrbgems/mruby-compiler/core/parse.y"
+#line 3044 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_dot2(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 8673 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8645 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 208: /* arg: arg ".."  */
-#line 3076 "mrbgems/mruby-compiler/core/parse.y"
+#line 3048 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_dot2(p, (yyvsp[-1].nd), new_nil(p));
                     }
-#line 8681 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8653 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 209: /* arg: tBDOT2 arg  */
-#line 3080 "mrbgems/mruby-compiler/core/parse.y"
+#line 3052 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_dot2(p, new_nil(p), (yyvsp[0].nd));
                     }
-#line 8689 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8661 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 210: /* arg: arg "..." arg  */
-#line 3084 "mrbgems/mruby-compiler/core/parse.y"
+#line 3056 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_dot3(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 8697 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8669 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 211: /* arg: arg "..."  */
-#line 3088 "mrbgems/mruby-compiler/core/parse.y"
+#line 3060 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_dot3(p, (yyvsp[-1].nd), new_nil(p));
                     }
-#line 8705 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8677 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 212: /* arg: tBDOT3 arg  */
-#line 3092 "mrbgems/mruby-compiler/core/parse.y"
+#line 3064 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_dot3(p, new_nil(p), (yyvsp[0].nd));
                     }
-#line 8713 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8685 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 213: /* arg: arg '+' arg  */
-#line 3096 "mrbgems/mruby-compiler/core/parse.y"
+#line 3068 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "+", (yyvsp[0].nd));
                     }
-#line 8721 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8693 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 214: /* arg: arg '-' arg  */
-#line 3100 "mrbgems/mruby-compiler/core/parse.y"
+#line 3072 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "-", (yyvsp[0].nd));
                     }
-#line 8729 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8701 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 215: /* arg: arg '*' arg  */
-#line 3104 "mrbgems/mruby-compiler/core/parse.y"
+#line 3076 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "*", (yyvsp[0].nd));
                     }
-#line 8737 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8709 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 216: /* arg: arg '/' arg  */
-#line 3108 "mrbgems/mruby-compiler/core/parse.y"
+#line 3080 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "/", (yyvsp[0].nd));
                     }
-#line 8745 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8717 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 217: /* arg: arg '%' arg  */
-#line 3112 "mrbgems/mruby-compiler/core/parse.y"
+#line 3084 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "%", (yyvsp[0].nd));
                     }
-#line 8753 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8725 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 218: /* arg: arg tPOW arg  */
-#line 3116 "mrbgems/mruby-compiler/core/parse.y"
+#line 3088 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "**", (yyvsp[0].nd));
                     }
-#line 8761 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8733 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 219: /* arg: tUMINUS_NUM "integer literal" tPOW arg  */
-#line 3120 "mrbgems/mruby-compiler/core/parse.y"
+#line 3092 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_negate(p, call_bin_op(p, (yyvsp[-2].nd), "**", (yyvsp[0].nd)));
                     }
-#line 8769 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8741 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 220: /* arg: tUMINUS_NUM "float literal" tPOW arg  */
-#line 3124 "mrbgems/mruby-compiler/core/parse.y"
+#line 3096 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_negate(p, call_bin_op(p, (yyvsp[-2].nd), "**", (yyvsp[0].nd)));
                     }
-#line 8777 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8749 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 221: /* arg: "unary plus" arg  */
-#line 3128 "mrbgems/mruby-compiler/core/parse.y"
+#line 3100 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_uni_op(p, (yyvsp[0].nd), "+@");
                     }
-#line 8785 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8757 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 222: /* arg: "unary minus" arg  */
-#line 3132 "mrbgems/mruby-compiler/core/parse.y"
+#line 3104 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_negate(p, (yyvsp[0].nd));
                     }
-#line 8793 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8765 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 223: /* arg: arg '|' arg  */
-#line 3136 "mrbgems/mruby-compiler/core/parse.y"
+#line 3108 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "|", (yyvsp[0].nd));
                     }
-#line 8801 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8773 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 224: /* arg: arg '^' arg  */
-#line 3140 "mrbgems/mruby-compiler/core/parse.y"
+#line 3112 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "^", (yyvsp[0].nd));
                     }
-#line 8809 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8781 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 225: /* arg: arg '&' arg  */
-#line 3144 "mrbgems/mruby-compiler/core/parse.y"
+#line 3116 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "&", (yyvsp[0].nd));
                     }
-#line 8817 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8789 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 226: /* arg: arg "<=>" arg  */
-#line 3148 "mrbgems/mruby-compiler/core/parse.y"
+#line 3120 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "<=>", (yyvsp[0].nd));
                     }
-#line 8825 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8797 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 227: /* arg: arg '>' arg  */
-#line 3152 "mrbgems/mruby-compiler/core/parse.y"
+#line 3124 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), ">", (yyvsp[0].nd));
                     }
-#line 8833 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8805 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 228: /* arg: arg ">=" arg  */
-#line 3156 "mrbgems/mruby-compiler/core/parse.y"
+#line 3128 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), ">=", (yyvsp[0].nd));
                     }
-#line 8841 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8813 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 229: /* arg: arg '<' arg  */
-#line 3160 "mrbgems/mruby-compiler/core/parse.y"
+#line 3132 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "<", (yyvsp[0].nd));
                     }
-#line 8849 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8821 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 230: /* arg: arg "<=" arg  */
-#line 3164 "mrbgems/mruby-compiler/core/parse.y"
+#line 3136 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "<=", (yyvsp[0].nd));
                     }
-#line 8857 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8829 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 231: /* arg: arg "==" arg  */
-#line 3168 "mrbgems/mruby-compiler/core/parse.y"
+#line 3140 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "==", (yyvsp[0].nd));
                     }
-#line 8865 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8837 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 232: /* arg: arg "===" arg  */
-#line 3172 "mrbgems/mruby-compiler/core/parse.y"
+#line 3144 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "===", (yyvsp[0].nd));
                     }
-#line 8873 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8845 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 233: /* arg: arg "!=" arg  */
-#line 3176 "mrbgems/mruby-compiler/core/parse.y"
+#line 3148 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "!=", (yyvsp[0].nd));
                     }
-#line 8881 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8853 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 234: /* arg: arg "=~" arg  */
-#line 3180 "mrbgems/mruby-compiler/core/parse.y"
+#line 3152 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "=~", (yyvsp[0].nd));
                     }
-#line 8889 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8861 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 235: /* arg: arg "!~" arg  */
-#line 3184 "mrbgems/mruby-compiler/core/parse.y"
+#line 3156 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "!~", (yyvsp[0].nd));
                     }
-#line 8897 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8869 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 236: /* arg: '!' arg  */
-#line 3188 "mrbgems/mruby-compiler/core/parse.y"
+#line 3160 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_uni_op(p, cond((yyvsp[0].nd)), "!");
                     }
-#line 8905 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8877 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 237: /* arg: '~' arg  */
-#line 3192 "mrbgems/mruby-compiler/core/parse.y"
+#line 3164 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_uni_op(p, cond((yyvsp[0].nd)), "~");
                     }
-#line 8913 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8885 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 238: /* arg: arg "<<" arg  */
-#line 3196 "mrbgems/mruby-compiler/core/parse.y"
+#line 3168 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), "<<", (yyvsp[0].nd));
                     }
-#line 8921 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8893 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 239: /* arg: arg ">>" arg  */
-#line 3200 "mrbgems/mruby-compiler/core/parse.y"
+#line 3172 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_bin_op(p, (yyvsp[-2].nd), ">>", (yyvsp[0].nd));
                     }
-#line 8929 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8901 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 240: /* arg: arg "&&" arg  */
-#line 3204 "mrbgems/mruby-compiler/core/parse.y"
+#line 3176 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_and(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 8937 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8909 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 241: /* arg: arg "||" arg  */
-#line 3208 "mrbgems/mruby-compiler/core/parse.y"
+#line 3180 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_or(p, (yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 8945 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8917 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 242: /* arg: arg '?' arg opt_nl ':' arg  */
-#line 3212 "mrbgems/mruby-compiler/core/parse.y"
+#line 3184 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_if(p, cond((yyvsp[-5].nd)), (yyvsp[-3].nd), (yyvsp[0].nd));
                     }
-#line 8953 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8925 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 243: /* arg: arg '?' arg opt_nl "label" arg  */
-#line 3216 "mrbgems/mruby-compiler/core/parse.y"
+#line 3188 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_if(p, cond((yyvsp[-5].nd)), (yyvsp[-3].nd), (yyvsp[0].nd));
                     }
-#line 8961 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8933 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 244: /* arg: defn_head f_opt_arglist_paren '=' arg  */
-#line 3220 "mrbgems/mruby-compiler/core/parse.y"
+#line 3192 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-3].nd);
                       endless_method_name(p, (yyvsp[-3].nd));
@@ -8970,11 +8942,11 @@ yyreduce:
                       nvars_unnest(p);
                       p->in_def--;
                     }
-#line 8974 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8946 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 245: /* arg: defn_head f_opt_arglist_paren '=' arg "'rescue' modifier" arg  */
-#line 3229 "mrbgems/mruby-compiler/core/parse.y"
+#line 3201 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-5].nd);
                       endless_method_name(p, (yyvsp[-5].nd));
@@ -8983,11 +8955,11 @@ yyreduce:
                       nvars_unnest(p);
                       p->in_def--;
                     }
-#line 8987 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8959 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 246: /* arg: defs_head f_opt_arglist_paren '=' arg  */
-#line 3238 "mrbgems/mruby-compiler/core/parse.y"
+#line 3210 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-3].nd);
                       void_expr_error(p, (yyvsp[0].nd));
@@ -8996,11 +8968,11 @@ yyreduce:
                       p->in_def--;
                       p->in_single--;
                     }
-#line 9000 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8972 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 247: /* arg: defs_head f_opt_arglist_paren '=' arg "'rescue' modifier" arg  */
-#line 3247 "mrbgems/mruby-compiler/core/parse.y"
+#line 3219 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-5].nd);
                       void_expr_error(p, (yyvsp[-2].nd));
@@ -9009,68 +8981,68 @@ yyreduce:
                       p->in_def--;
                       p->in_single--;
                     }
-#line 9013 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8985 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 248: /* arg: primary  */
-#line 3256 "mrbgems/mruby-compiler/core/parse.y"
+#line 3228 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 9021 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 8993 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 250: /* aref_args: args trailer  */
-#line 3263 "mrbgems/mruby-compiler/core/parse.y"
+#line 3235 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 9029 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9001 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 251: /* aref_args: args comma assocs trailer  */
-#line 3267 "mrbgems/mruby-compiler/core/parse.y"
+#line 3239 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-3].nd), new_hash(p, (yyvsp[-1].nd)));
                     }
-#line 9037 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9009 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 252: /* aref_args: assocs trailer  */
-#line 3271 "mrbgems/mruby-compiler/core/parse.y"
+#line 3243 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = cons(new_kw_hash(p, (yyvsp[-1].nd)), 0);
                     }
-#line 9045 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9017 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 253: /* arg_rhs: arg  */
-#line 3277 "mrbgems/mruby-compiler/core/parse.y"
+#line 3249 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 9053 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9025 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 254: /* arg_rhs: arg "'rescue' modifier" arg  */
-#line 3281 "mrbgems/mruby-compiler/core/parse.y"
+#line 3253 "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 9062 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9034 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 255: /* paren_args: '(' opt_call_args ')'  */
-#line 3288 "mrbgems/mruby-compiler/core/parse.y"
+#line 3260 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 9070 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9042 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 256: /* paren_args: '(' args comma tBDOT3 rparen  */
-#line 3292 "mrbgems/mruby-compiler/core/parse.y"
+#line 3264 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       mrb_sym r = intern_op(mul);
                       mrb_sym k = intern_op(pow);
@@ -9079,11 +9051,11 @@ yyreduce:
                                         new_kw_hash(p, list1(cons(new_kw_rest_args(p, 0), new_lvar(p, k)))),
                                         new_block_arg(p, new_lvar(p, b)));
                     }
-#line 9083 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9055 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 257: /* paren_args: '(' tBDOT3 rparen  */
-#line 3301 "mrbgems/mruby-compiler/core/parse.y"
+#line 3273 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       mrb_sym r = intern_op(mul);
                       mrb_sym k = intern_op(pow);
@@ -9098,390 +9070,390 @@ yyreduce:
                         (yyval.nd) = 0;
                       }
                     }
-#line 9102 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9074 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 262: /* opt_call_args: args comma  */
-#line 3324 "mrbgems/mruby-compiler/core/parse.y"
+#line 3296 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_callargs(p,(yyvsp[-1].nd),0,0);
                     }
-#line 9110 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9082 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 263: /* opt_call_args: args comma assocs comma  */
-#line 3328 "mrbgems/mruby-compiler/core/parse.y"
+#line 3300 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_callargs(p,(yyvsp[-3].nd),new_kw_hash(p,(yyvsp[-1].nd)),0);
                     }
-#line 9118 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9090 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 264: /* opt_call_args: assocs comma  */
-#line 3332 "mrbgems/mruby-compiler/core/parse.y"
+#line 3304 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_callargs(p,0,new_kw_hash(p,(yyvsp[-1].nd)),0);
                     }
-#line 9126 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9098 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 265: /* call_args: command  */
-#line 3338 "mrbgems/mruby-compiler/core/parse.y"
+#line 3310 "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 9135 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9107 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 266: /* call_args: args opt_block_arg  */
-#line 3343 "mrbgems/mruby-compiler/core/parse.y"
+#line 3315 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_callargs(p, (yyvsp[-1].nd), 0, (yyvsp[0].nd));
                     }
-#line 9143 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9115 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 267: /* call_args: assocs opt_block_arg  */
-#line 3347 "mrbgems/mruby-compiler/core/parse.y"
+#line 3319 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_callargs(p, 0, new_kw_hash(p, (yyvsp[-1].nd)), (yyvsp[0].nd));
                     }
-#line 9151 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9123 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 268: /* call_args: args comma assocs opt_block_arg  */
-#line 3351 "mrbgems/mruby-compiler/core/parse.y"
+#line 3323 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_callargs(p, (yyvsp[-3].nd), new_kw_hash(p, (yyvsp[-1].nd)), (yyvsp[0].nd));
                     }
-#line 9159 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9131 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 269: /* call_args: block_arg  */
-#line 3355 "mrbgems/mruby-compiler/core/parse.y"
+#line 3327 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_callargs(p, 0, 0, (yyvsp[0].nd));
                     }
-#line 9167 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9139 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 270: /* @7: %empty  */
-#line 3360 "mrbgems/mruby-compiler/core/parse.y"
+#line 3332 "mrbgems/mruby-compiler/core/parse.y"
                    {
                       (yyval.stack) = p->cmdarg_stack;
                       CMDARG_PUSH(1);
                     }
-#line 9176 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9148 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 271: /* command_args: @7 call_args  */
-#line 3365 "mrbgems/mruby-compiler/core/parse.y"
+#line 3337 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->cmdarg_stack = (yyvsp[-1].stack);
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 9185 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9157 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 272: /* block_arg: "&" arg  */
-#line 3372 "mrbgems/mruby-compiler/core/parse.y"
+#line 3344 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_block_arg(p, (yyvsp[0].nd));
                     }
-#line 9193 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9165 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 273: /* block_arg: "&"  */
-#line 3376 "mrbgems/mruby-compiler/core/parse.y"
+#line 3348 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_block_arg(p, 0);
                     }
-#line 9201 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9173 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 274: /* opt_block_arg: comma block_arg  */
-#line 3382 "mrbgems/mruby-compiler/core/parse.y"
+#line 3354 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 9209 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9181 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 275: /* opt_block_arg: none  */
-#line 3386 "mrbgems/mruby-compiler/core/parse.y"
+#line 3358 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = 0;
                     }
-#line 9217 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9189 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 277: /* args: arg  */
-#line 3395 "mrbgems/mruby-compiler/core/parse.y"
+#line 3367 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       void_expr_error(p, (yyvsp[0].nd));
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 9226 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9198 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 278: /* args: "*"  */
-#line 3400 "mrbgems/mruby-compiler/core/parse.y"
+#line 3372 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1(new_splat(p, new_lvar(p, intern_op(mul))));
                     }
-#line 9234 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9206 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 279: /* args: "*" arg  */
+#line 3376 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = list1(new_splat(p, (yyvsp[0].nd)));
+                    }
+#line 9214 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 280: /* args: args comma arg  */
+#line 3380 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      void_expr_error(p, (yyvsp[0].nd));
+                      (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
+                    }
+#line 9223 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 281: /* args: args comma "*"  */
+#line 3385 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = push((yyvsp[-2].nd), new_splat(p, new_lvar(p, intern_op(mul))));
+                    }
+#line 9231 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 282: /* args: args comma "*" arg  */
+#line 3389 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = push((yyvsp[-3].nd), new_splat(p, (yyvsp[0].nd)));
+                    }
+#line 9239 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 283: /* mrhs: args comma arg  */
+#line 3395 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      void_expr_error(p, (yyvsp[0].nd));
+                      (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
+                    }
+#line 9248 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 284: /* mrhs: args comma "*" arg  */
+#line 3400 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = push((yyvsp[-3].nd), new_splat(p, (yyvsp[0].nd)));
+                    }
+#line 9256 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 285: /* mrhs: "*" arg  */
 #line 3404 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1(new_splat(p, (yyvsp[0].nd)));
                     }
-#line 9242 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 280: /* args: args comma arg  */
-#line 3408 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      void_expr_error(p, (yyvsp[0].nd));
-                      (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
-                    }
-#line 9251 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 281: /* args: args comma "*"  */
-#line 3413 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = push((yyvsp[-2].nd), new_splat(p, new_lvar(p, intern_op(mul))));
-                    }
-#line 9259 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 282: /* args: args comma "*" arg  */
-#line 3417 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = push((yyvsp[-3].nd), new_splat(p, (yyvsp[0].nd)));
-                    }
-#line 9267 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 283: /* mrhs: args comma arg  */
-#line 3423 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      void_expr_error(p, (yyvsp[0].nd));
-                      (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
-                    }
-#line 9276 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 284: /* mrhs: args comma "*" arg  */
-#line 3428 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = push((yyvsp[-3].nd), new_splat(p, (yyvsp[0].nd)));
-                    }
-#line 9284 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 285: /* mrhs: "*" arg  */
-#line 3432 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = list1(new_splat(p, (yyvsp[0].nd)));
-                    }
-#line 9292 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9264 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 287: /* primary: string  */
-#line 3439 "mrbgems/mruby-compiler/core/parse.y"
+#line 3411 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_str(p, (yyvsp[0].nd));
                     }
-#line 9300 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9272 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 288: /* primary: xstring  */
-#line 3443 "mrbgems/mruby-compiler/core/parse.y"
+#line 3415 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_xstr(p, (yyvsp[0].nd));
                     }
-#line 9308 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9280 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 293: /* primary: "method"  */
-#line 3451 "mrbgems/mruby-compiler/core/parse.y"
+#line 3423 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_fcall(p, (yyvsp[0].id), 0);
                     }
-#line 9316 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9288 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 294: /* @8: %empty  */
-#line 3455 "mrbgems/mruby-compiler/core/parse.y"
+#line 3427 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.stack) = p->cmdarg_stack;
                       p->cmdarg_stack = 0;
                     }
-#line 9325 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9297 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 295: /* primary: "'begin'" @8 bodystmt "'end'"  */
-#line 3461 "mrbgems/mruby-compiler/core/parse.y"
+#line 3433 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->cmdarg_stack = (yyvsp[-2].stack);
                       (yyval.nd) = new_begin(p, (yyvsp[-1].nd));
                     }
-#line 9334 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9306 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 296: /* @9: %empty  */
-#line 3466 "mrbgems/mruby-compiler/core/parse.y"
+#line 3438 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.stack) = p->cmdarg_stack;
                       p->cmdarg_stack = 0;
                     }
-#line 9343 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9315 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 297: /* $@10: %empty  */
-#line 3470 "mrbgems/mruby-compiler/core/parse.y"
+#line 3442 "mrbgems/mruby-compiler/core/parse.y"
                        {p->lstate = EXPR_ENDARG;}
-#line 9349 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9321 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 298: /* primary: "(" @9 stmt $@10 rparen  */
-#line 3471 "mrbgems/mruby-compiler/core/parse.y"
+#line 3443 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->cmdarg_stack = (yyvsp[-3].stack);
                       (yyval.nd) = (yyvsp[-2].nd);
                     }
-#line 9358 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9330 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 299: /* $@11: %empty  */
-#line 3475 "mrbgems/mruby-compiler/core/parse.y"
+#line 3447 "mrbgems/mruby-compiler/core/parse.y"
                               {p->lstate = EXPR_ENDARG;}
-#line 9364 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9336 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 300: /* primary: "(" $@11 rparen  */
-#line 3476 "mrbgems/mruby-compiler/core/parse.y"
+#line 3448 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_nil(p);
                     }
-#line 9372 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9344 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 301: /* primary: tLPAREN compstmt ')'  */
-#line 3480 "mrbgems/mruby-compiler/core/parse.y"
+#line 3452 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 9380 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9352 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 302: /* primary: primary_value "::" "constant"  */
-#line 3484 "mrbgems/mruby-compiler/core/parse.y"
+#line 3456 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_colon2(p, (yyvsp[-2].nd), (yyvsp[0].id));
                     }
-#line 9388 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9360 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 303: /* primary: tCOLON3 "constant"  */
-#line 3488 "mrbgems/mruby-compiler/core/parse.y"
+#line 3460 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_colon3(p, (yyvsp[0].id));
                     }
-#line 9396 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9368 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 304: /* primary: "[" aref_args ']'  */
-#line 3492 "mrbgems/mruby-compiler/core/parse.y"
+#line 3464 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_array(p, (yyvsp[-1].nd));
                     }
-#line 9404 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9376 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 305: /* primary: tLBRACE assoc_list '}'  */
-#line 3496 "mrbgems/mruby-compiler/core/parse.y"
+#line 3468 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_hash(p, (yyvsp[-1].nd));
                     }
-#line 9412 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9384 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 306: /* primary: "'return'"  */
-#line 3500 "mrbgems/mruby-compiler/core/parse.y"
+#line 3472 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_return(p, 0);
                     }
-#line 9420 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9392 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 307: /* primary: "'yield'" opt_paren_args  */
-#line 3504 "mrbgems/mruby-compiler/core/parse.y"
+#line 3476 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_yield(p, (yyvsp[0].nd));
                     }
-#line 9428 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9400 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 308: /* primary: "'not'" '(' expr rparen  */
-#line 3508 "mrbgems/mruby-compiler/core/parse.y"
+#line 3480 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_uni_op(p, cond((yyvsp[-1].nd)), "!");
                     }
-#line 9436 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9408 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 309: /* primary: "'not'" '(' rparen  */
-#line 3512 "mrbgems/mruby-compiler/core/parse.y"
+#line 3484 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = call_uni_op(p, new_nil(p), "!");
                     }
-#line 9444 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9416 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 310: /* primary: operation brace_block  */
-#line 3516 "mrbgems/mruby-compiler/core/parse.y"
+#line 3488 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_fcall(p, (yyvsp[-1].id), new_callargs(p, 0, 0, (yyvsp[0].nd)));
                     }
-#line 9452 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9424 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 312: /* primary: method_call brace_block  */
-#line 3521 "mrbgems/mruby-compiler/core/parse.y"
+#line 3493 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       call_with_block(p, (yyvsp[-1].nd), (yyvsp[0].nd));
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 9461 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9433 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 313: /* @12: %empty  */
-#line 3526 "mrbgems/mruby-compiler/core/parse.y"
+#line 3498 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_nest(p);
                       nvars_nest(p);
                       (yyval.num) = p->lpar_beg;
                       p->lpar_beg = ++p->paren_nest;
                     }
-#line 9472 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9444 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 314: /* @13: %empty  */
-#line 3533 "mrbgems/mruby-compiler/core/parse.y"
+#line 3505 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.stack) = p->cmdarg_stack;
                       p->cmdarg_stack = 0;
                     }
-#line 9481 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9453 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 315: /* primary: "->" @12 f_larglist @13 lambda_body  */
-#line 3538 "mrbgems/mruby-compiler/core/parse.y"
+#line 3510 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->lpar_beg = (yyvsp[-3].num);
                       (yyval.nd) = new_lambda(p, (yyvsp[-2].nd), (yyvsp[0].nd));
@@ -9490,149 +9462,149 @@ yyreduce:
                       p->cmdarg_stack = (yyvsp[-1].stack);
                       CMDARG_LEXPOP();
                     }
-#line 9494 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9466 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 316: /* primary: "'if'" expr_value then compstmt if_tail "'end'"  */
-#line 3550 "mrbgems/mruby-compiler/core/parse.y"
+#line 3522 "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 9503 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9475 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 317: /* primary: "'unless'" expr_value then compstmt opt_else "'end'"  */
-#line 3558 "mrbgems/mruby-compiler/core/parse.y"
+#line 3530 "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 9512 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9484 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 318: /* $@14: %empty  */
-#line 3562 "mrbgems/mruby-compiler/core/parse.y"
+#line 3534 "mrbgems/mruby-compiler/core/parse.y"
                                 {COND_PUSH(1);}
-#line 9518 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9490 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 319: /* $@15: %empty  */
-#line 3562 "mrbgems/mruby-compiler/core/parse.y"
+#line 3534 "mrbgems/mruby-compiler/core/parse.y"
                                                               {COND_POP();}
-#line 9524 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9496 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 320: /* primary: "'while'" $@14 expr_value do $@15 compstmt "'end'"  */
-#line 3565 "mrbgems/mruby-compiler/core/parse.y"
+#line 3537 "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 9533 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9505 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 321: /* $@16: %empty  */
-#line 3569 "mrbgems/mruby-compiler/core/parse.y"
+#line 3541 "mrbgems/mruby-compiler/core/parse.y"
                                 {COND_PUSH(1);}
-#line 9539 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9511 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 322: /* $@17: %empty  */
-#line 3569 "mrbgems/mruby-compiler/core/parse.y"
+#line 3541 "mrbgems/mruby-compiler/core/parse.y"
                                                               {COND_POP();}
-#line 9545 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9517 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 323: /* primary: "'until'" $@16 expr_value do $@17 compstmt "'end'"  */
-#line 3572 "mrbgems/mruby-compiler/core/parse.y"
+#line 3544 "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 9554 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9526 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 324: /* primary: "'case'" expr_value opt_terms case_body "'end'"  */
-#line 3579 "mrbgems/mruby-compiler/core/parse.y"
+#line 3551 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_case(p, (yyvsp[-3].nd), (yyvsp[-1].nd));
                     }
-#line 9562 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9534 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 325: /* primary: "'case'" opt_terms case_body "'end'"  */
-#line 3583 "mrbgems/mruby-compiler/core/parse.y"
+#line 3555 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_case(p, 0, (yyvsp[-1].nd));
                     }
-#line 9570 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9542 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 326: /* $@18: %empty  */
-#line 3587 "mrbgems/mruby-compiler/core/parse.y"
+#line 3559 "mrbgems/mruby-compiler/core/parse.y"
                   {COND_PUSH(1);}
-#line 9576 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9548 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 327: /* $@19: %empty  */
-#line 3589 "mrbgems/mruby-compiler/core/parse.y"
+#line 3561 "mrbgems/mruby-compiler/core/parse.y"
                   {COND_POP();}
-#line 9582 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9554 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 328: /* primary: "'for'" for_var "'in'" $@18 expr_value do $@19 compstmt "'end'"  */
-#line 3592 "mrbgems/mruby-compiler/core/parse.y"
+#line 3564 "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 9591 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9563 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 329: /* @20: %empty  */
-#line 3598 "mrbgems/mruby-compiler/core/parse.y"
+#line 3570 "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 9602 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9574 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 330: /* primary: "'class'" cpath superclass @20 bodystmt "'end'"  */
-#line 3606 "mrbgems/mruby-compiler/core/parse.y"
+#line 3578 "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 9613 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9585 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 331: /* @21: %empty  */
-#line 3614 "mrbgems/mruby-compiler/core/parse.y"
+#line 3586 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.num) = p->in_def;
                       p->in_def = 0;
                     }
-#line 9622 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9594 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 332: /* @22: %empty  */
-#line 3619 "mrbgems/mruby-compiler/core/parse.y"
+#line 3591 "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 9632 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9604 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 333: /* primary: "'class'" "<<" expr @21 term @22 bodystmt "'end'"  */
-#line 3626 "mrbgems/mruby-compiler/core/parse.y"
+#line 3598 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_sclass(p, (yyvsp[-5].nd), (yyvsp[-1].nd));
                       SET_LINENO((yyval.nd), (yyvsp[-7].num));
@@ -9641,44 +9613,44 @@ yyreduce:
                       p->in_def = (yyvsp[-4].num);
                       p->in_single = node_to_int((yyvsp[-2].nd)->cdr);
                     }
-#line 9645 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9617 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 334: /* @23: %empty  */
-#line 3636 "mrbgems/mruby-compiler/core/parse.y"
+#line 3608 "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 9656 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9628 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 335: /* primary: "'module'" cpath @23 bodystmt "'end'"  */
-#line 3644 "mrbgems/mruby-compiler/core/parse.y"
+#line 3616 "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 9667 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9639 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 336: /* primary: defn_head f_arglist bodystmt "'end'"  */
-#line 3654 "mrbgems/mruby-compiler/core/parse.y"
+#line 3626 "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 9678 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9650 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 337: /* primary: defs_head f_arglist bodystmt "'end'"  */
-#line 3664 "mrbgems/mruby-compiler/core/parse.y"
+#line 3636 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-3].nd);
                       defn_setup(p, (yyval.nd), (yyvsp[-2].nd), (yyvsp[-1].nd));
@@ -9686,610 +9658,610 @@ yyreduce:
                       p->in_def--;
                       p->in_single--;
                     }
-#line 9690 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9662 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 338: /* primary: "'break'"  */
-#line 3672 "mrbgems/mruby-compiler/core/parse.y"
+#line 3644 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_break(p, 0);
                     }
-#line 9698 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9670 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 339: /* primary: "'next'"  */
-#line 3676 "mrbgems/mruby-compiler/core/parse.y"
+#line 3648 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_next(p, 0);
                     }
-#line 9706 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9678 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 340: /* primary: "'redo'"  */
-#line 3680 "mrbgems/mruby-compiler/core/parse.y"
+#line 3652 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_redo(p);
                     }
-#line 9714 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9686 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 341: /* primary: "'retry'"  */
-#line 3684 "mrbgems/mruby-compiler/core/parse.y"
+#line 3656 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_retry(p);
                     }
-#line 9722 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9694 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 342: /* primary_value: primary  */
-#line 3690 "mrbgems/mruby-compiler/core/parse.y"
+#line 3662 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                       if (!(yyval.nd)) (yyval.nd) = new_nil(p);
                     }
-#line 9731 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9703 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 349: /* if_tail: "'elsif'" expr_value then compstmt if_tail  */
-#line 3709 "mrbgems/mruby-compiler/core/parse.y"
+#line 3681 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_if(p, cond((yyvsp[-3].nd)), (yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 9739 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9711 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 351: /* opt_else: "'else'" compstmt  */
-#line 3716 "mrbgems/mruby-compiler/core/parse.y"
+#line 3688 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 9747 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9719 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 352: /* for_var: lhs  */
-#line 3722 "mrbgems/mruby-compiler/core/parse.y"
+#line 3694 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1(list1((yyvsp[0].nd)));
                     }
-#line 9755 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9727 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 354: /* f_margs: f_arg  */
-#line 3729 "mrbgems/mruby-compiler/core/parse.y"
+#line 3701 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3((yyvsp[0].nd),0,0);
                     }
-#line 9763 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9735 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 355: /* f_margs: f_arg ',' "*" f_norm_arg  */
-#line 3733 "mrbgems/mruby-compiler/core/parse.y"
+#line 3705 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3((yyvsp[-3].nd), new_lvar(p, (yyvsp[0].id)), 0);
                     }
-#line 9771 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9743 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 356: /* f_margs: f_arg ',' "*" f_norm_arg ',' f_arg  */
-#line 3737 "mrbgems/mruby-compiler/core/parse.y"
+#line 3709 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3((yyvsp[-5].nd), new_lvar(p, (yyvsp[-2].id)), (yyvsp[0].nd));
                     }
-#line 9779 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9751 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 357: /* f_margs: f_arg ',' "*"  */
-#line 3741 "mrbgems/mruby-compiler/core/parse.y"
+#line 3713 "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 9788 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9760 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 358: /* f_margs: f_arg ',' "*" ',' f_arg  */
-#line 3746 "mrbgems/mruby-compiler/core/parse.y"
+#line 3718 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3((yyvsp[-4].nd), int_to_node(-1), (yyvsp[0].nd));
                     }
-#line 9796 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9768 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 359: /* f_margs: "*" f_norm_arg  */
-#line 3750 "mrbgems/mruby-compiler/core/parse.y"
+#line 3722 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3(0, new_lvar(p, (yyvsp[0].id)), 0);
                     }
-#line 9804 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9776 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 360: /* f_margs: "*" f_norm_arg ',' f_arg  */
-#line 3754 "mrbgems/mruby-compiler/core/parse.y"
+#line 3726 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3(0, new_lvar(p, (yyvsp[-2].id)), (yyvsp[0].nd));
                     }
-#line 9812 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9784 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 361: /* f_margs: "*"  */
-#line 3758 "mrbgems/mruby-compiler/core/parse.y"
+#line 3730 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_f(p, intern_op(mul));
                       (yyval.nd) = list3(0, int_to_node(-1), 0);
                     }
-#line 9821 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9793 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 362: /* $@24: %empty  */
-#line 3763 "mrbgems/mruby-compiler/core/parse.y"
+#line 3735 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_f(p, intern_op(mul));
                     }
-#line 9829 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9801 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 363: /* f_margs: "*" ',' $@24 f_arg  */
-#line 3767 "mrbgems/mruby-compiler/core/parse.y"
+#line 3739 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list3(0, int_to_node(-1), (yyvsp[0].nd));
                     }
-#line 9837 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9809 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 364: /* block_args_tail: f_block_kwarg ',' f_kwrest opt_f_block_arg  */
-#line 3773 "mrbgems/mruby-compiler/core/parse.y"
+#line 3745 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, (yyvsp[-3].nd), (yyvsp[-1].id), (yyvsp[0].id));
                     }
-#line 9845 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9817 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 365: /* block_args_tail: f_block_kwarg opt_f_block_arg  */
-#line 3777 "mrbgems/mruby-compiler/core/parse.y"
+#line 3749 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, (yyvsp[-1].nd), 0, (yyvsp[0].id));
                     }
-#line 9853 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9825 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 366: /* block_args_tail: f_kwrest opt_f_block_arg  */
-#line 3781 "mrbgems/mruby-compiler/core/parse.y"
+#line 3753 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, 0, (yyvsp[-1].id), (yyvsp[0].id));
                     }
-#line 9861 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9833 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 367: /* block_args_tail: f_block_arg  */
-#line 3785 "mrbgems/mruby-compiler/core/parse.y"
+#line 3757 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, 0, 0, (yyvsp[0].id));
                     }
-#line 9869 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9841 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 368: /* opt_block_args_tail: ',' block_args_tail  */
-#line 3791 "mrbgems/mruby-compiler/core/parse.y"
+#line 3763 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 9877 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9849 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 369: /* opt_block_args_tail: %empty  */
-#line 3795 "mrbgems/mruby-compiler/core/parse.y"
+#line 3767 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, 0, 0, 0);
                     }
-#line 9885 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9857 "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 3801 "mrbgems/mruby-compiler/core/parse.y"
+#line 3773 "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 9893 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9865 "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 3805 "mrbgems/mruby-compiler/core/parse.y"
+#line 3777 "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 9901 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9873 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 372: /* block_param: f_arg ',' f_block_optarg opt_block_args_tail  */
-#line 3809 "mrbgems/mruby-compiler/core/parse.y"
+#line 3781 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, (yyvsp[-3].nd), (yyvsp[-1].nd), 0, 0, (yyvsp[0].nd));
                     }
-#line 9909 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9881 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 373: /* block_param: f_arg ',' f_block_optarg ',' f_arg opt_block_args_tail  */
-#line 3813 "mrbgems/mruby-compiler/core/parse.y"
+#line 3785 "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 9917 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9889 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 374: /* block_param: f_arg ',' f_rest_arg opt_block_args_tail  */
-#line 3817 "mrbgems/mruby-compiler/core/parse.y"
+#line 3789 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, (yyvsp[-3].nd), 0, (yyvsp[-1].id), 0, (yyvsp[0].nd));
                     }
-#line 9925 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9897 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 375: /* block_param: f_arg ',' opt_block_args_tail  */
-#line 3821 "mrbgems/mruby-compiler/core/parse.y"
+#line 3793 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, (yyvsp[-2].nd), 0, 0, 0, (yyvsp[0].nd));
                     }
-#line 9933 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9905 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 376: /* block_param: f_arg ',' f_rest_arg ',' f_arg opt_block_args_tail  */
-#line 3825 "mrbgems/mruby-compiler/core/parse.y"
+#line 3797 "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 9941 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9913 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 377: /* block_param: f_arg opt_block_args_tail  */
-#line 3829 "mrbgems/mruby-compiler/core/parse.y"
+#line 3801 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, (yyvsp[-1].nd), 0, 0, 0, (yyvsp[0].nd));
                     }
-#line 9949 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9921 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 378: /* block_param: f_block_optarg ',' f_rest_arg opt_block_args_tail  */
-#line 3833 "mrbgems/mruby-compiler/core/parse.y"
+#line 3805 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, (yyvsp[-3].nd), (yyvsp[-1].id), 0, (yyvsp[0].nd));
                     }
-#line 9957 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9929 "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 3837 "mrbgems/mruby-compiler/core/parse.y"
+#line 3809 "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 9965 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9937 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 380: /* block_param: f_block_optarg opt_block_args_tail  */
-#line 3841 "mrbgems/mruby-compiler/core/parse.y"
+#line 3813 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, (yyvsp[-1].nd), 0, 0, (yyvsp[0].nd));
                     }
-#line 9973 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9945 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 381: /* block_param: f_block_optarg ',' f_arg opt_block_args_tail  */
-#line 3845 "mrbgems/mruby-compiler/core/parse.y"
+#line 3817 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, (yyvsp[-3].nd), 0, (yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 9981 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9953 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 382: /* block_param: f_rest_arg opt_block_args_tail  */
-#line 3849 "mrbgems/mruby-compiler/core/parse.y"
+#line 3821 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, 0, (yyvsp[-1].id), 0, (yyvsp[0].nd));
                     }
-#line 9989 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9961 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 383: /* block_param: f_rest_arg ',' f_arg opt_block_args_tail  */
-#line 3853 "mrbgems/mruby-compiler/core/parse.y"
+#line 3825 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, 0, (yyvsp[-3].id), (yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 9997 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9969 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 384: /* block_param: block_args_tail  */
-#line 3857 "mrbgems/mruby-compiler/core/parse.y"
+#line 3829 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, 0, 0, 0, (yyvsp[0].nd));
                     }
-#line 10005 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9977 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 385: /* opt_block_param: none  */
-#line 3863 "mrbgems/mruby-compiler/core/parse.y"
+#line 3835 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_blk(p);
                       (yyval.nd) = 0;
                     }
-#line 10014 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9986 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 386: /* opt_block_param: block_param_def  */
-#line 3868 "mrbgems/mruby-compiler/core/parse.y"
+#line 3840 "mrbgems/mruby-compiler/core/parse.y"
                    {
                       p->cmd_start = TRUE;
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 10023 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 9995 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 387: /* $@25: %empty  */
-#line 3874 "mrbgems/mruby-compiler/core/parse.y"
+#line 3846 "mrbgems/mruby-compiler/core/parse.y"
                       {local_add_blk(p);}
-#line 10029 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10001 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 388: /* block_param_def: '|' $@25 opt_bv_decl '|'  */
-#line 3875 "mrbgems/mruby-compiler/core/parse.y"
+#line 3847 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = 0;
                     }
-#line 10037 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10009 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 389: /* block_param_def: "||"  */
-#line 3879 "mrbgems/mruby-compiler/core/parse.y"
+#line 3851 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_blk(p);
                       (yyval.nd) = 0;
                     }
-#line 10046 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10018 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 390: /* block_param_def: '|' block_param opt_bv_decl '|'  */
-#line 3884 "mrbgems/mruby-compiler/core/parse.y"
+#line 3856 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-2].nd);
                     }
-#line 10054 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10026 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 391: /* opt_bv_decl: opt_nl  */
-#line 3890 "mrbgems/mruby-compiler/core/parse.y"
+#line 3862 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = 0;
                     }
-#line 10062 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10034 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 392: /* opt_bv_decl: opt_nl ';' bv_decls opt_nl  */
-#line 3894 "mrbgems/mruby-compiler/core/parse.y"
+#line 3866 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = 0;
                     }
-#line 10070 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10042 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 395: /* bvar: "local variable or method"  */
-#line 3904 "mrbgems/mruby-compiler/core/parse.y"
+#line 3876 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_f(p, (yyvsp[0].id));
                       new_bv(p, (yyvsp[0].id));
                     }
-#line 10079 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10051 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 397: /* f_larglist: '(' f_args opt_bv_decl ')'  */
-#line 3912 "mrbgems/mruby-compiler/core/parse.y"
+#line 3884 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-2].nd);
                     }
-#line 10087 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10059 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 398: /* f_larglist: f_args  */
-#line 3916 "mrbgems/mruby-compiler/core/parse.y"
+#line 3888 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 10095 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10067 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 399: /* lambda_body: tLAMBEG compstmt '}'  */
-#line 3922 "mrbgems/mruby-compiler/core/parse.y"
+#line 3894 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 10103 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10075 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 400: /* lambda_body: "'do' for lambda" bodystmt "'end'"  */
-#line 3926 "mrbgems/mruby-compiler/core/parse.y"
+#line 3898 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 10111 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10083 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 401: /* @26: %empty  */
-#line 3932 "mrbgems/mruby-compiler/core/parse.y"
+#line 3904 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_nest(p);
                       nvars_nest(p);
                       (yyval.num) = p->lineno;
                     }
-#line 10121 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10093 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 402: /* do_block: "'do' for block" @26 opt_block_param bodystmt "'end'"  */
-#line 3940 "mrbgems/mruby-compiler/core/parse.y"
+#line 3912 "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 10132 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10104 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 403: /* block_call: command do_block  */
-#line 3949 "mrbgems/mruby-compiler/core/parse.y"
+#line 3921 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       call_with_block(p, (yyvsp[-1].nd), (yyvsp[0].nd));
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 10141 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10113 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 404: /* block_call: block_call call_op2 operation2 opt_paren_args  */
-#line 3954 "mrbgems/mruby-compiler/core/parse.y"
+#line 3926 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), (yyvsp[-1].id), (yyvsp[0].nd), (yyvsp[-2].num));
                     }
-#line 10149 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10121 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 405: /* block_call: block_call call_op2 operation2 opt_paren_args brace_block  */
-#line 3958 "mrbgems/mruby-compiler/core/parse.y"
+#line 3930 "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 10158 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10130 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 406: /* block_call: block_call call_op2 operation2 command_args do_block  */
-#line 3963 "mrbgems/mruby-compiler/core/parse.y"
+#line 3935 "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 10167 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10139 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 407: /* method_call: operation paren_args  */
-#line 3970 "mrbgems/mruby-compiler/core/parse.y"
+#line 3942 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_fcall(p, (yyvsp[-1].id), (yyvsp[0].nd));
                     }
-#line 10175 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10147 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 408: /* method_call: primary_value call_op operation2 opt_paren_args  */
-#line 3974 "mrbgems/mruby-compiler/core/parse.y"
+#line 3946 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), (yyvsp[-1].id), (yyvsp[0].nd), (yyvsp[-2].num));
                     }
-#line 10183 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10155 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 409: /* method_call: primary_value "::" operation2 paren_args  */
-#line 3978 "mrbgems/mruby-compiler/core/parse.y"
+#line 3950 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), (yyvsp[-1].id), (yyvsp[0].nd), tCOLON2);
                     }
-#line 10191 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10163 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 410: /* method_call: primary_value "::" operation3  */
-#line 3982 "mrbgems/mruby-compiler/core/parse.y"
+#line 3954 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-2].nd), (yyvsp[0].id), 0, tCOLON2);
                     }
-#line 10199 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10171 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 411: /* method_call: primary_value call_op paren_args  */
-#line 3986 "mrbgems/mruby-compiler/core/parse.y"
+#line 3958 "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 10207 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10179 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 412: /* method_call: primary_value "::" paren_args  */
-#line 3990 "mrbgems/mruby-compiler/core/parse.y"
+#line 3962 "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 10215 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10187 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 413: /* method_call: "'super'" paren_args  */
-#line 3994 "mrbgems/mruby-compiler/core/parse.y"
+#line 3966 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_super(p, (yyvsp[0].nd));
                     }
-#line 10223 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10195 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 414: /* method_call: "'super'"  */
-#line 3998 "mrbgems/mruby-compiler/core/parse.y"
+#line 3970 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_zsuper(p);
                     }
-#line 10231 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10203 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 415: /* method_call: primary_value '[' opt_call_args ']'  */
-#line 4002 "mrbgems/mruby-compiler/core/parse.y"
+#line 3974 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_call(p, (yyvsp[-3].nd), intern_op(aref), (yyvsp[-1].nd), '.');
                     }
-#line 10239 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10211 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 416: /* @27: %empty  */
-#line 4008 "mrbgems/mruby-compiler/core/parse.y"
+#line 3980 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_nest(p);
                       nvars_nest(p);
                       (yyval.num) = p->lineno;
                     }
-#line 10249 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10221 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 417: /* brace_block: '{' @27 opt_block_param compstmt '}'  */
-#line 4015 "mrbgems/mruby-compiler/core/parse.y"
+#line 3987 "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 10260 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10232 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 418: /* @28: %empty  */
-#line 4022 "mrbgems/mruby-compiler/core/parse.y"
+#line 3994 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_nest(p);
                       nvars_nest(p);
                       (yyval.num) = p->lineno;
                     }
-#line 10270 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10242 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 419: /* brace_block: "'do'" @28 opt_block_param bodystmt "'end'"  */
-#line 4029 "mrbgems/mruby-compiler/core/parse.y"
+#line 4001 "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 10281 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10253 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 420: /* case_body: "'when'" args then compstmt cases  */
-#line 4040 "mrbgems/mruby-compiler/core/parse.y"
+#line 4012 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = cons(cons((yyvsp[-3].nd), (yyvsp[-1].nd)), (yyvsp[0].nd));
                     }
-#line 10289 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10261 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 421: /* cases: opt_else  */
-#line 4046 "mrbgems/mruby-compiler/core/parse.y"
+#line 4018 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       if ((yyvsp[0].nd)) {
                         (yyval.nd) = cons(cons(0, (yyvsp[0].nd)), 0);
@@ -10298,155 +10270,155 @@ yyreduce:
                         (yyval.nd) = 0;
                       }
                     }
-#line 10302 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10274 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 423: /* opt_rescue: "'rescue'" exc_list exc_var then compstmt opt_rescue  */
-#line 4060 "mrbgems/mruby-compiler/core/parse.y"
+#line 4032 "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 10311 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10283 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 425: /* exc_list: arg  */
-#line 4068 "mrbgems/mruby-compiler/core/parse.y"
+#line 4040 "mrbgems/mruby-compiler/core/parse.y"
                     {
                         (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 10319 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10291 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 428: /* exc_var: "=>" lhs  */
-#line 4076 "mrbgems/mruby-compiler/core/parse.y"
+#line 4048 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 10327 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10299 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 430: /* opt_ensure: "'ensure'" compstmt  */
-#line 4083 "mrbgems/mruby-compiler/core/parse.y"
+#line 4055 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 10335 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10307 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 437: /* string: string string_fragment  */
-#line 4097 "mrbgems/mruby-compiler/core/parse.y"
+#line 4069 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = append((yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 10343 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10315 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 438: /* string_fragment: "character literal"  */
-#line 4103 "mrbgems/mruby-compiler/core/parse.y"
+#line 4075 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       /* tCHAR is (len . str), wrap as cons list */
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 10352 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10324 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 439: /* string_fragment: tSTRING  */
-#line 4108 "mrbgems/mruby-compiler/core/parse.y"
+#line 4080 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       /* tSTRING is (len . str), wrap as cons list */
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 10361 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10333 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 440: /* string_fragment: "string literal" tSTRING  */
-#line 4113 "mrbgems/mruby-compiler/core/parse.y"
+#line 4085 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       /* $2 is (len . str), wrap as cons list */
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 10370 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10342 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 441: /* string_fragment: "string literal" string_rep tSTRING  */
-#line 4118 "mrbgems/mruby-compiler/core/parse.y"
+#line 4090 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 10378 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10350 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 443: /* string_rep: string_rep string_interp  */
-#line 4125 "mrbgems/mruby-compiler/core/parse.y"
+#line 4097 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = append((yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 10386 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10358 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 444: /* string_interp: tSTRING_MID  */
-#line 4131 "mrbgems/mruby-compiler/core/parse.y"
+#line 4103 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       /* $1 is already in (len . str) format */
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 10395 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10367 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 445: /* @29: %empty  */
-#line 4136 "mrbgems/mruby-compiler/core/parse.y"
+#line 4108 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push_strterm(p);
                     }
-#line 10403 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10375 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 446: /* string_interp: tSTRING_PART @29 compstmt '}'  */
-#line 4141 "mrbgems/mruby-compiler/core/parse.y"
+#line 4113 "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 10414 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10386 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 447: /* string_interp: tLITERAL_DELIM  */
-#line 4148 "mrbgems/mruby-compiler/core/parse.y"
+#line 4120 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1(new_literal_delim(p));
                     }
-#line 10422 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10394 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 448: /* string_interp: tHD_LITERAL_DELIM heredoc_bodies  */
-#line 4152 "mrbgems/mruby-compiler/core/parse.y"
+#line 4124 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1(new_literal_delim(p));
                     }
-#line 10430 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10402 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 449: /* xstring: tXSTRING_BEG tXSTRING  */
-#line 4158 "mrbgems/mruby-compiler/core/parse.y"
+#line 4130 "mrbgems/mruby-compiler/core/parse.y"
                     {
                         (yyval.nd) = cons((yyvsp[0].nd), (node*)NULL);
                     }
-#line 10438 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10410 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 450: /* xstring: tXSTRING_BEG string_rep tXSTRING  */
-#line 4162 "mrbgems/mruby-compiler/core/parse.y"
+#line 4134 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 10446 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10418 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 451: /* regexp: tREGEXP_BEG tREGEXP  */
-#line 4168 "mrbgems/mruby-compiler/core/parse.y"
+#line 4140 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       node *data = (yyvsp[0].nd);  /* ((len . pattern) . (flags . encoding)) */
                       const char *flags = (const char*)data->cdr->car;
@@ -10455,11 +10427,11 @@ yyreduce:
                       node *pattern_list = cons(data->car, (node*)NULL);
                       (yyval.nd) = new_dregx(p, pattern_list, flags, encoding);
                     }
-#line 10459 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10431 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 452: /* regexp: tREGEXP_BEG string_rep tREGEXP  */
-#line 4177 "mrbgems/mruby-compiler/core/parse.y"
+#line 4149 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       node *data = (yyvsp[0].nd);  /* ((len . pattern) . (flags . encoding)) */
                       const char *flags = (const char*)data->cdr->car;
@@ -10468,47 +10440,47 @@ yyreduce:
                       node *complete_list = push((yyvsp[-1].nd), data->car);
                       (yyval.nd) = new_dregx(p, complete_list, flags, encoding);
                     }
-#line 10472 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10444 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 456: /* heredoc_body: tHEREDOC_END  */
-#line 4195 "mrbgems/mruby-compiler/core/parse.y"
+#line 4167 "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 10482 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10454 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 457: /* heredoc_body: heredoc_string_rep tHEREDOC_END  */
-#line 4201 "mrbgems/mruby-compiler/core/parse.y"
+#line 4173 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       heredoc_end(p);
                     }
-#line 10490 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10462 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 460: /* heredoc_string_interp: tHD_STRING_MID  */
-#line 4211 "mrbgems/mruby-compiler/core/parse.y"
+#line 4183 "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 10500 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10472 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 461: /* @30: %empty  */
-#line 4217 "mrbgems/mruby-compiler/core/parse.y"
+#line 4189 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push_strterm(p);
                     }
-#line 10508 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10480 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 462: /* heredoc_string_interp: tHD_STRING_PART @30 compstmt '}'  */
-#line 4222 "mrbgems/mruby-compiler/core/parse.y"
+#line 4194 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       pop_strterm(p, (yyvsp[-2].nd));
                       parser_heredoc_info *info = parsing_heredoc_info(p);
@@ -10516,37 +10488,37 @@ yyreduce:
                       node *expr_elem = cons(int_to_node(-1), (yyvsp[-1].nd));
                       info->doc = push(push(info->doc, (yyvsp[-3].nd)), expr_elem);
                     }
-#line 10520 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10492 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 463: /* words: tWORDS_BEG tSTRING  */
-#line 4232 "mrbgems/mruby-compiler/core/parse.y"
+#line 4204 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_words(p, list1((yyvsp[0].nd)));
                     }
-#line 10528 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10500 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 464: /* words: tWORDS_BEG string_rep tSTRING  */
-#line 4236 "mrbgems/mruby-compiler/core/parse.y"
+#line 4208 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       node *n = (yyvsp[-1].nd);
                       n = push(n, (yyvsp[0].nd));
                       (yyval.nd) = new_words(p, n);
                     }
-#line 10538 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10510 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 465: /* symbol: basic_symbol  */
-#line 4244 "mrbgems/mruby-compiler/core/parse.y"
+#line 4216 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_sym(p, (yyvsp[0].id));
                     }
-#line 10546 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10518 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 466: /* symbol: "symbol" "string literal" string_rep tSTRING  */
-#line 4248 "mrbgems/mruby-compiler/core/parse.y"
+#line 4220 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       node *n = (yyvsp[-1].nd);
                       p->lstate = EXPR_ENDARG;
@@ -10558,183 +10530,183 @@ yyreduce:
                       }
                       (yyval.nd) = new_dsym(p, new_str(p, n));
                     }
-#line 10562 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10534 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 467: /* symbol: "symbol" "numbered parameter"  */
-#line 4260 "mrbgems/mruby-compiler/core/parse.y"
+#line 4232 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       mrb_sym sym = intern_numparam((yyvsp[0].num));
                       (yyval.nd) = new_sym(p, sym);
                     }
-#line 10571 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10543 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 468: /* basic_symbol: "symbol" sym  */
-#line 4267 "mrbgems/mruby-compiler/core/parse.y"
+#line 4239 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->lstate = EXPR_END;
                       (yyval.id) = (yyvsp[0].id);
                     }
-#line 10580 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10552 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 473: /* sym: tSTRING  */
-#line 4278 "mrbgems/mruby-compiler/core/parse.y"
+#line 4250 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.id) = new_strsym(p, (yyvsp[0].nd));
                     }
-#line 10588 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10560 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 474: /* sym: "string literal" tSTRING  */
-#line 4282 "mrbgems/mruby-compiler/core/parse.y"
+#line 4254 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.id) = new_strsym(p, (yyvsp[0].nd));
                     }
-#line 10596 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10568 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 475: /* symbols: tSYMBOLS_BEG tSTRING  */
-#line 4288 "mrbgems/mruby-compiler/core/parse.y"
+#line 4260 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_symbols(p, list1((yyvsp[0].nd)));
                     }
-#line 10604 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10576 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 476: /* symbols: tSYMBOLS_BEG string_rep tSTRING  */
-#line 4292 "mrbgems/mruby-compiler/core/parse.y"
+#line 4264 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       node *n = (yyvsp[-1].nd);
                       n = push(n, (yyvsp[0].nd));
                       (yyval.nd) = new_symbols(p, n);
                     }
-#line 10614 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10586 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 479: /* numeric: tUMINUS_NUM "integer literal"  */
-#line 4302 "mrbgems/mruby-compiler/core/parse.y"
+#line 4274 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_negate(p, (yyvsp[0].nd));
                     }
-#line 10622 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10594 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 480: /* numeric: tUMINUS_NUM "float literal"  */
-#line 4306 "mrbgems/mruby-compiler/core/parse.y"
+#line 4278 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_negate(p, (yyvsp[0].nd));
                     }
-#line 10630 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10602 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 481: /* variable: "local variable or method"  */
-#line 4312 "mrbgems/mruby-compiler/core/parse.y"
+#line 4284 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_lvar(p, (yyvsp[0].id));
                     }
-#line 10638 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10610 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 482: /* variable: "instance variable"  */
-#line 4316 "mrbgems/mruby-compiler/core/parse.y"
+#line 4288 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_ivar(p, (yyvsp[0].id));
                     }
-#line 10646 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10618 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 483: /* variable: "global variable"  */
-#line 4320 "mrbgems/mruby-compiler/core/parse.y"
+#line 4292 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_gvar(p, (yyvsp[0].id));
                     }
-#line 10654 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10626 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 484: /* variable: "class variable"  */
-#line 4324 "mrbgems/mruby-compiler/core/parse.y"
+#line 4296 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_cvar(p, (yyvsp[0].id));
                     }
-#line 10662 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10634 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 485: /* variable: "constant"  */
-#line 4328 "mrbgems/mruby-compiler/core/parse.y"
+#line 4300 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_const(p, (yyvsp[0].id));
                     }
-#line 10670 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10642 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 486: /* var_lhs: variable  */
-#line 4334 "mrbgems/mruby-compiler/core/parse.y"
+#line 4306 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       assignable(p, (yyvsp[0].nd));
                     }
-#line 10678 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10650 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 487: /* var_lhs: "numbered parameter"  */
-#line 4338 "mrbgems/mruby-compiler/core/parse.y"
+#line 4310 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[0]), p, "can't assign to numbered parameter");
                     }
-#line 10686 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10658 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 488: /* var_ref: variable  */
-#line 4344 "mrbgems/mruby-compiler/core/parse.y"
+#line 4316 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = var_reference(p, (yyvsp[0].nd));
                     }
-#line 10694 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10666 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 489: /* var_ref: "numbered parameter"  */
-#line 4348 "mrbgems/mruby-compiler/core/parse.y"
+#line 4320 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_nvar(p, (yyvsp[0].num));
                     }
-#line 10702 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10674 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 490: /* var_ref: "'nil'"  */
-#line 4352 "mrbgems/mruby-compiler/core/parse.y"
+#line 4324 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_nil(p);
                     }
-#line 10710 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10682 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 491: /* var_ref: "'self'"  */
-#line 4356 "mrbgems/mruby-compiler/core/parse.y"
+#line 4328 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_self(p);
                     }
-#line 10718 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10690 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 492: /* var_ref: "'true'"  */
-#line 4360 "mrbgems/mruby-compiler/core/parse.y"
+#line 4332 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_true(p);
                     }
-#line 10726 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10698 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 493: /* var_ref: "'false'"  */
-#line 4364 "mrbgems/mruby-compiler/core/parse.y"
+#line 4336 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_false(p);
                     }
-#line 10734 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10706 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 494: /* var_ref: "'__FILE__'"  */
-#line 4368 "mrbgems/mruby-compiler/core/parse.y"
+#line 4340 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       const char *fn = mrb_sym_name_len(p->mrb, p->filename_sym, NULL);
                       if (!fn) {
@@ -10742,686 +10714,686 @@ yyreduce:
                       }
                       (yyval.nd) = new_str(p, cons(cons(int_to_node(strlen(fn)), (node*)fn), (node*)NULL));
                     }
-#line 10746 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10718 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 495: /* var_ref: "'__LINE__'"  */
-#line 4376 "mrbgems/mruby-compiler/core/parse.y"
+#line 4348 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       char buf[16];
 
                       dump_int(p->lineno, buf);
                       (yyval.nd) = new_int(p, buf, 10, 0);
                     }
-#line 10757 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10729 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 496: /* var_ref: "'__ENCODING__'"  */
-#line 4383 "mrbgems/mruby-compiler/core/parse.y"
+#line 4355 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_fcall(p, MRB_SYM_2(p->mrb, __ENCODING__), 0);
                     }
-#line 10765 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10737 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 499: /* superclass: %empty  */
-#line 4393 "mrbgems/mruby-compiler/core/parse.y"
+#line 4365 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = 0;
                     }
-#line 10773 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10745 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 500: /* $@31: %empty  */
-#line 4397 "mrbgems/mruby-compiler/core/parse.y"
+#line 4369 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->lstate = EXPR_BEG;
                       p->cmd_start = TRUE;
                     }
-#line 10782 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10754 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 501: /* superclass: '<' $@31 expr_value term  */
-#line 4402 "mrbgems/mruby-compiler/core/parse.y"
+#line 4374 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 10790 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10762 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 504: /* f_arglist_paren: '(' f_args rparen  */
-#line 4418 "mrbgems/mruby-compiler/core/parse.y"
+#line 4390 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                       p->lstate = EXPR_BEG;
                       p->cmd_start = TRUE;
                     }
-#line 10800 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10772 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 505: /* f_arglist_paren: '(' f_arg ',' tBDOT3 rparen  */
-#line 4424 "mrbgems/mruby-compiler/core/parse.y"
+#line 4396 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_dots(p, (yyvsp[-3].nd));
                     }
-#line 10808 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10780 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 506: /* f_arglist_paren: '(' tBDOT3 rparen  */
-#line 4428 "mrbgems/mruby-compiler/core/parse.y"
+#line 4400 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_dots(p, 0);
                     }
-#line 10816 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10788 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 508: /* f_arglist: f_args term  */
-#line 4435 "mrbgems/mruby-compiler/core/parse.y"
+#line 4407 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 10824 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10796 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 509: /* f_arglist: f_arg ',' tBDOT3 term  */
-#line 4439 "mrbgems/mruby-compiler/core/parse.y"
+#line 4411 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_dots(p, (yyvsp[-3].nd));
                     }
-#line 10832 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10804 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 510: /* f_arglist: "..." term  */
-#line 4443 "mrbgems/mruby-compiler/core/parse.y"
+#line 4415 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_dots(p, 0);
                     }
-#line 10840 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10812 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 511: /* f_label: "local variable or method" "label"  */
-#line 4449 "mrbgems/mruby-compiler/core/parse.y"
+#line 4421 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_nest(p);
                     }
-#line 10848 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10820 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 512: /* f_label: "numbered parameter" "label"  */
-#line 4453 "mrbgems/mruby-compiler/core/parse.y"
+#line 4425 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_nest(p);
                     }
-#line 10856 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10828 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 513: /* f_kw: f_label arg  */
-#line 4459 "mrbgems/mruby-compiler/core/parse.y"
+#line 4431 "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 10838 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 514: /* f_kw: f_label  */
+#line 4437 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_kw_arg(p, (yyvsp[0].id), 0);
+                      local_unnest(p);
+                    }
+#line 10847 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 515: /* f_block_kw: f_label primary_value  */
+#line 4444 "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 10857 "mrbgems/mruby-compiler/core/y.tab.c"
+    break;
+
+  case 516: /* f_block_kw: f_label  */
+#line 4450 "mrbgems/mruby-compiler/core/parse.y"
+                    {
+                      (yyval.nd) = new_kw_arg(p, (yyvsp[0].id), 0);
+                      local_unnest(p);
+                    }
 #line 10866 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
-  case 514: /* f_kw: f_label  */
-#line 4465 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_kw_arg(p, (yyvsp[0].id), 0);
-                      local_unnest(p);
-                    }
-#line 10875 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 515: /* f_block_kw: f_label primary_value  */
-#line 4472 "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 10885 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
-  case 516: /* f_block_kw: f_label  */
-#line 4478 "mrbgems/mruby-compiler/core/parse.y"
-                    {
-                      (yyval.nd) = new_kw_arg(p, (yyvsp[0].id), 0);
-                      local_unnest(p);
-                    }
-#line 10894 "mrbgems/mruby-compiler/core/y.tab.c"
-    break;
-
   case 517: /* f_block_kwarg: f_block_kw  */
-#line 4485 "mrbgems/mruby-compiler/core/parse.y"
+#line 4457 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 10902 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10874 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 518: /* f_block_kwarg: f_block_kwarg ',' f_block_kw  */
-#line 4489 "mrbgems/mruby-compiler/core/parse.y"
+#line 4461 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 10910 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10882 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 519: /* f_kwarg: f_kw  */
-#line 4495 "mrbgems/mruby-compiler/core/parse.y"
+#line 4467 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 10918 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10890 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 520: /* f_kwarg: f_kwarg ',' f_kw  */
-#line 4499 "mrbgems/mruby-compiler/core/parse.y"
+#line 4471 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 10926 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10898 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 523: /* f_kwrest: kwrest_mark "local variable or method"  */
-#line 4509 "mrbgems/mruby-compiler/core/parse.y"
+#line 4481 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.id) = (yyvsp[0].id);
                     }
-#line 10934 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10906 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 524: /* f_kwrest: kwrest_mark  */
-#line 4513 "mrbgems/mruby-compiler/core/parse.y"
+#line 4485 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.id) = intern_op(pow);
                     }
-#line 10942 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10914 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 525: /* args_tail: f_kwarg ',' f_kwrest opt_f_block_arg  */
-#line 4519 "mrbgems/mruby-compiler/core/parse.y"
+#line 4491 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, (yyvsp[-3].nd), (yyvsp[-1].id), (yyvsp[0].id));
                     }
-#line 10950 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10922 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 526: /* args_tail: f_kwarg opt_f_block_arg  */
-#line 4523 "mrbgems/mruby-compiler/core/parse.y"
+#line 4495 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, (yyvsp[-1].nd), 0, (yyvsp[0].id));
                     }
-#line 10958 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10930 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 527: /* args_tail: f_kwrest opt_f_block_arg  */
-#line 4527 "mrbgems/mruby-compiler/core/parse.y"
+#line 4499 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, 0, (yyvsp[-1].id), (yyvsp[0].id));
                     }
-#line 10966 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10938 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 528: /* args_tail: f_block_arg  */
-#line 4531 "mrbgems/mruby-compiler/core/parse.y"
+#line 4503 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, 0, 0, (yyvsp[0].id));
                     }
-#line 10974 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10946 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 529: /* opt_args_tail: ',' args_tail  */
-#line 4537 "mrbgems/mruby-compiler/core/parse.y"
+#line 4509 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[0].nd);
                     }
-#line 10982 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10954 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 530: /* opt_args_tail: %empty  */
-#line 4541 "mrbgems/mruby-compiler/core/parse.y"
+#line 4513 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args_tail(p, 0, 0, 0);
                     }
-#line 10990 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10962 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 531: /* f_args: f_arg ',' f_optarg ',' f_rest_arg opt_args_tail  */
-#line 4547 "mrbgems/mruby-compiler/core/parse.y"
+#line 4519 "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 10998 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10970 "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 4551 "mrbgems/mruby-compiler/core/parse.y"
+#line 4523 "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 11006 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10978 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 533: /* f_args: f_arg ',' f_optarg opt_args_tail  */
-#line 4555 "mrbgems/mruby-compiler/core/parse.y"
+#line 4527 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, (yyvsp[-3].nd), (yyvsp[-1].nd), 0, 0, (yyvsp[0].nd));
                     }
-#line 11014 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10986 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 534: /* f_args: f_arg ',' f_optarg ',' f_arg opt_args_tail  */
-#line 4559 "mrbgems/mruby-compiler/core/parse.y"
+#line 4531 "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 11022 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 10994 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 535: /* f_args: f_arg ',' f_rest_arg opt_args_tail  */
-#line 4563 "mrbgems/mruby-compiler/core/parse.y"
+#line 4535 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, (yyvsp[-3].nd), 0, (yyvsp[-1].id), 0, (yyvsp[0].nd));
                     }
-#line 11030 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11002 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 536: /* f_args: f_arg ',' f_rest_arg ',' f_arg opt_args_tail  */
-#line 4567 "mrbgems/mruby-compiler/core/parse.y"
+#line 4539 "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 11038 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11010 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 537: /* f_args: f_arg opt_args_tail  */
-#line 4571 "mrbgems/mruby-compiler/core/parse.y"
+#line 4543 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, (yyvsp[-1].nd), 0, 0, 0, (yyvsp[0].nd));
                     }
-#line 11046 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11018 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 538: /* f_args: f_optarg ',' f_rest_arg opt_args_tail  */
-#line 4575 "mrbgems/mruby-compiler/core/parse.y"
+#line 4547 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, (yyvsp[-3].nd), (yyvsp[-1].id), 0, (yyvsp[0].nd));
                     }
-#line 11054 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11026 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 539: /* f_args: f_optarg ',' f_rest_arg ',' f_arg opt_args_tail  */
-#line 4579 "mrbgems/mruby-compiler/core/parse.y"
+#line 4551 "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 11062 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11034 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 540: /* f_args: f_optarg opt_args_tail  */
-#line 4583 "mrbgems/mruby-compiler/core/parse.y"
+#line 4555 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, (yyvsp[-1].nd), 0, 0, (yyvsp[0].nd));
                     }
-#line 11070 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11042 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 541: /* f_args: f_optarg ',' f_arg opt_args_tail  */
-#line 4587 "mrbgems/mruby-compiler/core/parse.y"
+#line 4559 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, (yyvsp[-3].nd), 0, (yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 11078 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11050 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 542: /* f_args: f_rest_arg opt_args_tail  */
-#line 4591 "mrbgems/mruby-compiler/core/parse.y"
+#line 4563 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, 0, (yyvsp[-1].id), 0, (yyvsp[0].nd));
                     }
-#line 11086 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11058 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 543: /* f_args: f_rest_arg ',' f_arg opt_args_tail  */
-#line 4595 "mrbgems/mruby-compiler/core/parse.y"
+#line 4567 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, 0, (yyvsp[-3].id), (yyvsp[-1].nd), (yyvsp[0].nd));
                     }
-#line 11094 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11066 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 544: /* f_args: args_tail  */
-#line 4599 "mrbgems/mruby-compiler/core/parse.y"
+#line 4571 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_args(p, 0, 0, 0, 0, (yyvsp[0].nd));
                     }
-#line 11102 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11074 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 545: /* f_args: %empty  */
-#line 4603 "mrbgems/mruby-compiler/core/parse.y"
+#line 4575 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_f(p, 0);
                       (yyval.nd) = new_args(p, 0, 0, 0, 0, 0);
                     }
-#line 11111 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11083 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 546: /* f_bad_arg: "constant"  */
-#line 4610 "mrbgems/mruby-compiler/core/parse.y"
+#line 4582 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[0]), p, "formal argument cannot be a constant");
                       (yyval.nd) = 0;
                     }
-#line 11120 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11092 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 547: /* f_bad_arg: "instance variable"  */
-#line 4615 "mrbgems/mruby-compiler/core/parse.y"
+#line 4587 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[0]), p, "formal argument cannot be an instance variable");
                       (yyval.nd) = 0;
                     }
-#line 11129 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11101 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 548: /* f_bad_arg: "global variable"  */
-#line 4620 "mrbgems/mruby-compiler/core/parse.y"
+#line 4592 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[0]), p, "formal argument cannot be a global variable");
                       (yyval.nd) = 0;
                     }
-#line 11138 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11110 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 549: /* f_bad_arg: "class variable"  */
-#line 4625 "mrbgems/mruby-compiler/core/parse.y"
+#line 4597 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[0]), p, "formal argument cannot be a class variable");
                       (yyval.nd) = 0;
                     }
-#line 11147 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11119 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 550: /* f_bad_arg: "numbered parameter"  */
-#line 4630 "mrbgems/mruby-compiler/core/parse.y"
+#line 4602 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       yyerror(&(yylsp[0]), p, "formal argument cannot be a numbered parameter");
                       (yyval.nd) = 0;
                     }
-#line 11156 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11128 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 551: /* f_norm_arg: f_bad_arg  */
-#line 4637 "mrbgems/mruby-compiler/core/parse.y"
+#line 4609 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.id) = 0;
                     }
-#line 11164 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11136 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 552: /* f_norm_arg: "local variable or method"  */
-#line 4641 "mrbgems/mruby-compiler/core/parse.y"
+#line 4613 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_f(p, (yyvsp[0].id));
                       (yyval.id) = (yyvsp[0].id);
                     }
-#line 11173 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11145 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 553: /* f_arg_item: f_norm_arg  */
-#line 4648 "mrbgems/mruby-compiler/core/parse.y"
+#line 4620 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = new_lvar(p, (yyvsp[0].id));
                     }
-#line 11181 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11153 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 554: /* @32: %empty  */
-#line 4652 "mrbgems/mruby-compiler/core/parse.y"
+#line 4624 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = local_switch(p);
                     }
-#line 11189 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11161 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 555: /* f_arg_item: tLPAREN @32 f_margs rparen  */
-#line 4656 "mrbgems/mruby-compiler/core/parse.y"
+#line 4628 "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 11199 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11171 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 556: /* f_arg: f_arg_item  */
-#line 4664 "mrbgems/mruby-compiler/core/parse.y"
+#line 4636 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 11207 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11179 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 557: /* f_arg: f_arg ',' f_arg_item  */
-#line 4668 "mrbgems/mruby-compiler/core/parse.y"
+#line 4640 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 11215 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11187 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 558: /* f_opt_asgn: "local variable or method" '='  */
-#line 4674 "mrbgems/mruby-compiler/core/parse.y"
+#line 4646 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_f(p, (yyvsp[-1].id));
                       local_nest(p);
                       (yyval.id) = (yyvsp[-1].id);
                     }
-#line 11225 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11197 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 559: /* f_opt: f_opt_asgn arg  */
-#line 4682 "mrbgems/mruby-compiler/core/parse.y"
+#line 4654 "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 11235 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11207 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 560: /* f_block_opt: f_opt_asgn primary_value  */
-#line 4690 "mrbgems/mruby-compiler/core/parse.y"
+#line 4662 "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 11245 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11217 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 561: /* f_block_optarg: f_block_opt  */
-#line 4698 "mrbgems/mruby-compiler/core/parse.y"
+#line 4670 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 11253 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11225 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 562: /* f_block_optarg: f_block_optarg ',' f_block_opt  */
-#line 4702 "mrbgems/mruby-compiler/core/parse.y"
+#line 4674 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 11261 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11233 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 563: /* f_optarg: f_opt  */
-#line 4708 "mrbgems/mruby-compiler/core/parse.y"
+#line 4680 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 11269 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11241 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 564: /* f_optarg: f_optarg ',' f_opt  */
-#line 4712 "mrbgems/mruby-compiler/core/parse.y"
+#line 4684 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 11277 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11249 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 567: /* f_rest_arg: restarg_mark "local variable or method"  */
-#line 4722 "mrbgems/mruby-compiler/core/parse.y"
+#line 4694 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       local_add_f(p, (yyvsp[0].id));
                       (yyval.id) = (yyvsp[0].id);
                     }
-#line 11286 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11258 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 568: /* f_rest_arg: restarg_mark  */
-#line 4727 "mrbgems/mruby-compiler/core/parse.y"
+#line 4699 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.id) = intern_op(mul);
                       local_add_f(p, (yyval.id));
                     }
-#line 11295 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11267 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 571: /* f_block_arg: blkarg_mark "local variable or method"  */
-#line 4738 "mrbgems/mruby-compiler/core/parse.y"
+#line 4710 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.id) = (yyvsp[0].id);
                     }
-#line 11303 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11275 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 572: /* f_block_arg: blkarg_mark  */
-#line 4742 "mrbgems/mruby-compiler/core/parse.y"
+#line 4714 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.id) = intern_op(and);
                     }
-#line 11311 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11283 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 573: /* opt_f_block_arg: ',' f_block_arg  */
-#line 4748 "mrbgems/mruby-compiler/core/parse.y"
+#line 4720 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.id) = (yyvsp[0].id);
                     }
-#line 11319 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11291 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 574: /* opt_f_block_arg: none  */
-#line 4752 "mrbgems/mruby-compiler/core/parse.y"
+#line 4724 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.id) = 0;
                     }
-#line 11327 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11299 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 575: /* singleton: var_ref  */
-#line 4758 "mrbgems/mruby-compiler/core/parse.y"
+#line 4730 "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 11337 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11309 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 576: /* $@33: %empty  */
-#line 4763 "mrbgems/mruby-compiler/core/parse.y"
+#line 4735 "mrbgems/mruby-compiler/core/parse.y"
                       {p->lstate = EXPR_BEG;}
-#line 11343 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11315 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 577: /* singleton: '(' $@33 expr rparen  */
-#line 4764 "mrbgems/mruby-compiler/core/parse.y"
+#line 4736 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       prohibit_literals(p, (yyvsp[-1].nd));
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 11352 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11324 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 579: /* assoc_list: assocs trailer  */
-#line 4772 "mrbgems/mruby-compiler/core/parse.y"
+#line 4744 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = (yyvsp[-1].nd);
                     }
-#line 11360 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11332 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 580: /* assocs: assoc  */
-#line 4778 "mrbgems/mruby-compiler/core/parse.y"
+#line 4750 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = list1((yyvsp[0].nd));
                     }
-#line 11368 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11340 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 581: /* assocs: assocs comma assoc  */
-#line 4782 "mrbgems/mruby-compiler/core/parse.y"
+#line 4754 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = push((yyvsp[-2].nd), (yyvsp[0].nd));
                     }
-#line 11376 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11348 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 582: /* assoc: arg "=>" arg  */
-#line 4788 "mrbgems/mruby-compiler/core/parse.y"
+#line 4760 "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 11386 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11358 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 583: /* assoc: "local variable or method" "label" arg  */
-#line 4794 "mrbgems/mruby-compiler/core/parse.y"
+#line 4766 "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 11395 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11367 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 584: /* assoc: "local variable or method" "label"  */
-#line 4799 "mrbgems/mruby-compiler/core/parse.y"
+#line 4771 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = cons(new_sym(p, (yyvsp[-1].id)), label_reference(p, (yyvsp[-1].id)));
                     }
-#line 11403 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11375 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 585: /* assoc: "numbered parameter" "label"  */
-#line 4803 "mrbgems/mruby-compiler/core/parse.y"
+#line 4775 "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 11412 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11384 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 586: /* assoc: "numbered parameter" "label" arg  */
-#line 4808 "mrbgems/mruby-compiler/core/parse.y"
+#line 4780 "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 11421 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11393 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 587: /* assoc: string_fragment "label" arg  */
-#line 4813 "mrbgems/mruby-compiler/core/parse.y"
+#line 4785 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       void_expr_error(p, (yyvsp[0].nd));
                       if ((yyvsp[-2].nd)->cdr) {
@@ -11437,75 +11409,75 @@ yyreduce:
                         (yyval.nd) = cons(new_sym(p, new_strsym(p, (yyvsp[-2].nd)->car)), (yyvsp[0].nd));
                       }
                     }
-#line 11441 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11413 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 588: /* assoc: "**" arg  */
-#line 4829 "mrbgems/mruby-compiler/core/parse.y"
+#line 4801 "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 11450 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11422 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 589: /* assoc: "**"  */
-#line 4834 "mrbgems/mruby-compiler/core/parse.y"
+#line 4806 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = cons(new_kw_rest_args(p, 0), new_lvar(p, intern_op(pow)));
                     }
-#line 11458 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11430 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 602: /* call_op: '.'  */
-#line 4860 "mrbgems/mruby-compiler/core/parse.y"
+#line 4832 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.num) = '.';
                     }
-#line 11466 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11438 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 603: /* call_op: "&."  */
-#line 4864 "mrbgems/mruby-compiler/core/parse.y"
+#line 4836 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.num) = 0;
                     }
-#line 11474 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11446 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 605: /* call_op2: "::"  */
-#line 4871 "mrbgems/mruby-compiler/core/parse.y"
+#line 4843 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.num) = tCOLON2;
                     }
-#line 11482 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11454 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 614: /* term: ';'  */
-#line 4892 "mrbgems/mruby-compiler/core/parse.y"
+#line 4864 "mrbgems/mruby-compiler/core/parse.y"
                       {yyerrok;}
-#line 11488 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11460 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 616: /* nl: '\n'  */
-#line 4897 "mrbgems/mruby-compiler/core/parse.y"
+#line 4869 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       p->lineno += (yyvsp[0].num);
                       p->column = 0;
                     }
-#line 11497 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11469 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
   case 620: /* none: %empty  */
-#line 4909 "mrbgems/mruby-compiler/core/parse.y"
+#line 4881 "mrbgems/mruby-compiler/core/parse.y"
                     {
                       (yyval.nd) = 0;
                     }
-#line 11505 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11477 "mrbgems/mruby-compiler/core/y.tab.c"
     break;
 
 
-#line 11509 "mrbgems/mruby-compiler/core/y.tab.c"
+#line 11481 "mrbgems/mruby-compiler/core/y.tab.c"
 
       default: break;
     }
@@ -11738,7 +11710,7 @@ yyreturnlab:
   return yyresult;
 }
 
-#line 4913 "mrbgems/mruby-compiler/core/parse.y"
+#line 4885 "mrbgems/mruby-compiler/core/parse.y"
 
 #define pylval  (*((YYSTYPE*)(p->ylval)))