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Inherit MRB_FL_UNDEF_ALLOCATE in subclasses

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If `Class#allocate` is prohibited, subclasses should also be implicitly prohibited.

```ruby
p Class.new(Struct).allocate.class
# => #<Class:0x82362ac00>                                             by #6122
# => allocator undefined for #<Class:0x000000083a983220> (TypeError)  by Ruby 3.2
```

Added `MRB_DEFINE_ALLOCATOR()` to allow subclasses to use `Class#allocate`.

Supplement to #6122.
This commit is contained in:
dearblue
2023-12-23 21:01:42 +09:00
parent 63580581f7
commit 2a1ea7d605
4 changed files with 4 additions and 0 deletions
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include/mruby/class.h
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@@ -78,6 +78,7 @@ mrb_class(mrb_state *mrb, mrb_value v)
#define MRB_FL_UNDEF_ALLOCATE (1 << 6)
#define MRB_UNDEF_ALLOCATOR(c) (mrb_assert((c)->tt == MRB_TT_CLASS), (c)->flags |= MRB_FL_UNDEF_ALLOCATE)
#define MRB_UNDEF_ALLOCATOR_P(c) ((c)->flags & MRB_FL_UNDEF_ALLOCATE)
#define MRB_DEFINE_ALLOCATOR(c) ((c)->flags &= ~MRB_FL_UNDEF_ALLOCATE)
MRB_API void mrb_define_method_raw(mrb_state*, struct RClass*, mrb_sym, mrb_method_t);
MRB_API void mrb_alias_method(mrb_state*, struct RClass *c, mrb_sym a, mrb_sym b);