Remove unnecessary `mrb_funcall()`.
MODIFY
mrbgems/mruby-io/src/io.c
mrbgems/mruby-io/src/io.c
@@ -284,12 +284,13 @@ mrb_io_alloc(mrb_state *mrb)
#endif
static int
-option_to_fd(mrb_state *mrb, mrb_value obj, const char *key)
+option_to_fd(mrb_state *mrb, mrb_value hash, const char *key)
{
- mrb_value opt = mrb_funcall(mrb, obj, "[]", 1, mrb_symbol_value(mrb_intern_static(mrb, key, strlen(key))));
- if (mrb_nil_p(opt)) {
- return -1;
- }
+ mrb_value opt;
+
+ if (!mrb_hash_p(hash)) return -1;
+ opt = mrb_hash_fetch(mrb, hash, mrb_symbol_value(mrb_intern_static(mrb, key, strlen(key))), mrb_nil_value());
+ if (mrb_nil_p(opt)) return -1;
switch (mrb_type(opt)) {
case MRB_TT_DATA: /* IO */

Remove unnecessary `mrb_funcall()`.