mruby-compiler: remove unused NODE_MATCH node type and related code

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

Co-authored-by: Claude <noreply@anthropic.com>

mrbgems/mruby-compiler/core/codegen.c

@@ -5082,16 +5082,6 @@ gen_dvar_var(codegen_scope *s, node *varnode, int val)
   }
 }
 
-static void
-gen_match_var(codegen_scope *s, node *varnode, int val)
-{
-  struct mrb_ast_match_node *n = (struct mrb_ast_match_node*)varnode;
-  // MATCH nodes are not currently used in mruby, but provide basic implementation
-  if (val) {
-    codegen(s, n->pattern, val);
-  }
-}
-
 // Group 11: Operators and Expressions
 static void
 gen_not_var(codegen_scope *s, node *varnode, int val)
@@ -5710,10 +5700,6 @@ codegen(codegen_scope *s, node *tree, int val)
     gen_dvar_var(s, tree, val);
     break;
 
-  case NODE_MATCH:
-    gen_match_var(s, tree, val);
-    break;
-
   case NODE_NOT:
     gen_not_var(s, tree, val);
     break;

mrbgems/mruby-compiler/core/node.h

@@ -48,7 +48,6 @@ enum node_type {
   NODE_NVAR,
   NODE_NTH_REF,
   NODE_BACK_REF,
-  NODE_MATCH,
   NODE_INT,
   NODE_BIGINT,
   NODE_FLOAT,
@@ -675,16 +674,10 @@ struct mrb_ast_dvar_node {
   mrb_sym name;
 };
 
-struct mrb_ast_match_node {
-  struct mrb_ast_var_header header;
-  struct mrb_ast_node *pattern;
-};
-
 #define nth_ref_node(n) ((struct mrb_ast_nth_ref_node*)(n))
 #define back_ref_node(n) ((struct mrb_ast_back_ref_node*)(n))
 #define nvar_node(n) ((struct mrb_ast_nvar_node*)(n))
 #define dvar_node(n) ((struct mrb_ast_dvar_node*)(n))
-#define match_node(n) ((struct mrb_ast_match_node*)(n))
 
 #define NTH_REF_NODE_NTH(n) (nth_ref_node(n)->nth)
 #define BACK_REF_NODE_TYPE(n) (back_ref_node(n)->type)

mrbgems/mruby-compiler/core/parse.y

@@ -1894,7 +1894,6 @@ prohibit_literals(parser_state *p, node *n)
     case NODE_STR:
     case NODE_XSTR:
     case NODE_REGX:
-    case NODE_MATCH:
     case NODE_FLOAT:
     case NODE_ARRAY:
     case NODE_HEREDOC:
@@ -8189,16 +8188,6 @@ mrb_parser_dump(mrb_state *mrb, node *tree, int offset)
     printf("NODE_RETRY\n");
     break;
 
-  case NODE_MATCH:
-    printf("NODE_MATCH:\n");
-    dump_prefix(offset + 1, lineno);
-    printf("lhs:\n");
-    mrb_parser_dump(mrb, tree->car, offset + 2);
-    dump_prefix(offset + 1, lineno);
-    printf("rhs:\n");
-    mrb_parser_dump(mrb, tree->cdr, offset + 2);
-    break;
-
   case NODE_BACK_REF:
     printf("NODE_BACK_REF: $%c\n", node_to_int(tree));
     break;