mirror of
https://github.com/ruby/ruby.git
synced 2022-11-09 12:17:21 -05:00
43 lines
1.9 KiB
C++
43 lines
1.9 KiB
C++
#ifndef RUBY3_ATTR_PURE_H /*-*-C++-*-vi:se ft=cpp:*/
|
|
#define RUBY3_ATTR_PURE_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 `RUBY3` or `ruby3` 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 #RUBY3_ATTR_PURE.
|
|
*/
|
|
#include "ruby/impl/compiler_since.h"
|
|
#include "ruby/impl/has/attribute.h"
|
|
#include "ruby/assert.h"
|
|
|
|
/** Wraps (or simulates) `__attribute__((pure))` */
|
|
#if RUBY3_HAS_ATTRIBUTE(pure)
|
|
# define RUBY3_ATTR_PURE() __attribute__((__pure__))
|
|
#elif RUBY3_COMPILER_SINCE(SunPro, 5, 10, 0)
|
|
# define RUBY3_ATTR_PURE() _Pragma("does_not_write_global_data")
|
|
#else
|
|
# define RUBY3_ATTR_PURE() /* void */
|
|
#endif
|
|
|
|
/** Enables #RUBY3_ATTR_PURE iff. #RUBY_NDEBUG. */
|
|
#if RUBY_NDEBUG
|
|
# define RUBY3_ATTR_PURE_ON_NDEBUG() RUBY3_ATTR_PURE()
|
|
#else
|
|
# define RUBY3_ATTR_PURE_ON_NDEBUG() /* void */
|
|
#endif
|
|
|
|
#endif /* RUBY3_ATTR_PURE_H */
|