Ruby: include/ruby/internal/has/cpp_attribute.h File Reference

Ruby 3.0.5p211 (2022-11-24 revision ba5cf0f7c52d4d35cc6a173c89eda98ceffa2dcf)

Macros
cpp_attribute.h File Reference

Defines RBIMPL_HAS_CPP_ATTRIBUTE. More...

`#include "ruby/internal/compiler_is.h"`
`#include "ruby/internal/compiler_since.h"`
`#include "ruby/internal/token_paste.h"`

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## Macros
#define | RBIMPL_HAS_CPP_ATTRIBUTE(_) ((RBIMPL_HAS_CPP_ATTRIBUTE0(_) <= __cplusplus) ? RBIMPL_HAS_CPP_ATTRIBUTE0(_) : 0)
| Wraps (or simulates) `__has_cpp_attribute`. More...

## Detailed Description

Defines RBIMPL_HAS_CPP_ATTRIBUTE.

Author
  Ruby developers ruby-.nosp@m.core.nosp@m.@ruby.nosp@m.-lan.nosp@m.g.org

Copyright
  This file is a part of the programming language Ruby. Permission is hereby granted, to either redistribute and/or modify this file, provided that the conditions mentioned in the file COPYING are met. Consult the file for details.

Warning
  Symbols prefixed with either `RBIMPL` or `rbimpl` are implementation details. Don't take them as canon. They could rapidly appear then vanish. The name (path) of this header file is also an implementation detail. Do not expect it to persist at the place it is now. Developers are free to move it anywhere anytime at will.

Note
  To ruby-core: remember that this header can be possibly recursively included from extension libraries written in C++. Do not expect for instance `__VA_ARGS__` is always available. We assume C99 for ruby itself but we don't assume languages of extension libraries. They could be written in C++98.

Definition in file cpp_attribute.h.

## Macro Definition Documentation

## ◆ RBIMPL_HAS_CPP_ATTRIBUTE

#define RBIMPL_HAS_CPP_ATTRIBUTE | ( |  | _ | ) | ((RBIMPL_HAS_CPP_ATTRIBUTE0(_) <= __cplusplus) ? RBIMPL_HAS_CPP_ATTRIBUTE0(_) : 0)

Wraps (or simulates) `__has_cpp_attribute`.

Definition at line 83 of file cpp_attribute.h.