parse.y: allow arguments start with _ to appear multiple times; fix #5604

2026-06-08 16:11:16 +00:00 · 2021-12-24 07:41:37 +09:00
parent 3b59c95ead
commit 39191cd9fa
2 changed files with 1061 additions and 1053 deletions
@@ -302,8 +302,12 @@ local_add_f(parser_state *p, mrb_sym sym)
    node *n = p->locals->car;
    while (n) {
      if (sym(n->car) == sym) {
-        yyerror(p, "duplicated argument name");
-        return;
+        mrb_int len;
+        const char* name = mrb_sym_name_len(p->mrb, sym, &len);
+        if (len > 0 && name[0] != '_') {
+          yyerror(p, "duplicated argument name");
+          return;
+        }
      }
      n = n->cdr;
    }