Warnings for numbered parameters in nested blocks.
MODIFY
mrbgems/mruby-compiler/core/parse.y
mrbgems/mruby-compiler/core/parse.y
@@ -326,7 +326,7 @@ nvars_nest(parser_state *p)
static void
nvars_block(parser_state *p)
{
- p->nvars = cons(p->nvars, nint(-1));
+ p->nvars = cons(p->nvars, nint(-2));
}
static void
@@ -673,7 +673,7 @@ new_cvar(parser_state *p, mrb_sym sym)
static node*
new_nvar(parser_state *p, int num)
{
- if (!p->nvars || intn(p->nvars->cdr) < 0) {
+ if (!p->nvars || intn(p->nvars->cdr) < -1) {
yyerror(p, "numbered parameter outside block");
} else {
int nvars = intn(p->nvars->cdr);
@@ -5954,6 +5954,19 @@ parser_yylex(parser_state *p)
case '_':
if (toklen(p) == 2 && ISDIGIT(tok(p)[1])) {
int n = tok(p)[1] - '0';
+ node *nvars = p->nvars->car;
+
+ while (nvars) {
+ if (intn(nvars->cdr) > 0) {
+ yywarning(p, "numbered parameter in nested block");
+ break;
+ }
+ nvars->cdr = nint(-1);
+ nvars = nvars->car;
+ }
+ if (intn(p->nvars->cdr) < 0) {
+ yywarning(p, "numbered parameter in nested block");
+ }
if (n == 0) {
yyerror(p, "_0 is not available");
return 0;

Warnings for numbered parameters in nested blocks.