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Warnings for numbered parameters in nested blocks.

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This commit is contained in:
Yukihiro "Matz" Matsumoto
2019-10-09 10:28:16 +09:00
parent f7a0f11c36
commit fb9e92e828
1 changed files with 15 additions and 2 deletions
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mrbgems/mruby-compiler/core/parse.y
+15 -2
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@@ -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;