Revert "`instance_eval` for classes and modules should behave as `class_eval`."

This reverts commit ee3017496ba60ca418b5e54c1f8f5d8b38524a52.

I misunderstood something and the new behavior was different from CRuby.
The issue was reported by @dearblue, regarding #5478

1 files changed, 1 insertions, 11 deletions

diff --git a/src/vm.c b/src/vm.c
index d902716ca..1490ad232 100644
--- a/src/vm.c
+++ b/src/vm.c
@@ -792,21 +792,11 @@ mrb_value
 mrb_obj_instance_eval(mrb_state *mrb, mrb_value self)
 {
   mrb_value a, b;
-  struct RClass *c;
 
   if (mrb_get_args(mrb, "|S&", &a, &b) == 1) {
     mrb_raise(mrb, E_NOTIMP_ERROR, "instance_eval with string not implemented");
   }
-  switch (mrb_type(self)) {
-  case MRB_TT_MODULE:
-  case MRB_TT_CLASS:
-  case MRB_TT_ICLASS:
-    c = mrb_class_ptr(self);
-    break;
-  default:
-    c = mrb_singleton_class_ptr(mrb, self);
-  }
-  return eval_under(mrb, self, b, c);
+  return eval_under(mrb, self, b, mrb_singleton_class_ptr(mrb, self));
 }
 
 MRB_API mrb_value