mirror of
https://github.com/ruby/ruby.git
synced 2022-11-09 12:17:21 -05:00
33 lines
1.7 KiB
C++
33 lines
1.7 KiB
C++
#ifndef RBIMPL_HAS_EXTENSION_H /*-*-C++-*-vi:se ft=cpp:*/
|
|
#define RBIMPL_HAS_EXTENSION_H
|
|
/**
|
|
* @file
|
|
* @author Ruby developers <ruby-core@ruby-lang.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.
|
|
* @brief Defines #RBIMPL_HAS_EXTENSION.
|
|
*/
|
|
#include "ruby/internal/has/feature.h"
|
|
|
|
/** Wraps (or simulates) `__has_extension`. */
|
|
#if defined(__has_extension)
|
|
# define RBIMPL_HAS_EXTENSION(_) __has_extension(_)
|
|
#else
|
|
# /* Pre-3.0 clang had __has_feature but not __has_extension. */
|
|
# define RBIMPL_HAS_EXTENSION(_) RBIMPL_HAS_FEATURE(_)
|
|
#endif
|
|
|
|
#endif /* RBIMPL_HAS_EXTENSION_H */
|