Ruby: include/ruby/internal/has Directory Reference

Ruby 3.3.5p100 (2024-09-03 revision ef084cc8f4958c1b6e4ead99136631bef6d8ddba)

has Directory Reference

## Files
| attribute.h
| Defines RBIMPL_HAS_ATTRIBUTE.
| builtin.h
| Defines RBIMPL_HAS_BUILTIN.
| c_attribute.h
| Defines RBIMPL_HAS_C_ATTRIBUTE.
| cpp_attribute.h
| Defines RBIMPL_HAS_CPP_ATTRIBUTE.
| declspec_attribute.h
| Defines RBIMPL_HAS_DECLSPEC_ATTRIBUTE.
| extension.h
| Defines RBIMPL_HAS_EXTENSION.
| feature.h
| Defines RBIMPL_HAS_FEATURE.
| warning.h
| Defines RBIMPL_HAS_WARNING.