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Compositing NODE_STR and NODE_STR

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dearblue
2019-02-27 21:42:37 +09:00
parent cece016389
commit 9913643ed8
1 changed files with 15 additions and 0 deletions
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mrbgems/mruby-compiler/core/parse.y
+15
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@@ -855,6 +855,21 @@ new_dstr(parser_state *p, node *a)
static node*
concat_string(parser_state *p, node *a, node *b)
{
if ((enum node_type)(intptr_t)a->car == NODE_STR) {
if ((enum node_type)(intptr_t)b->car == NODE_STR) {
/* a == NODE_STR && b == NODE_STR */
size_t newlen = (size_t)a->cdr->cdr + (size_t)b->cdr->cdr;
char *str = (char*)mrb_pool_realloc(p->pool, a->cdr->car, (size_t)a->cdr->cdr + 1, newlen + 1);
memcpy(str + (size_t)a->cdr->cdr, b->cdr->car, (size_t)b->cdr->cdr);
str[newlen] = '\0';
a->cdr->car = (node*)str;
a->cdr->cdr = (node*)newlen;
cons_free(b->cdr);
cons_free(b);
return a;
}
}
return new_dstr(p, list2(a, b));
}