Ruby: include/ruby/internal/has Directory Reference

Ruby 3.4.9p82 (2026-03-11 revision 76cca827ab52ab1d346a728f068d5b8da3e2952b)

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.