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#ifndef RBIMPL_STDBOOL_H /*-*-C++-*-vi:se ft=cpp:*/
#define RBIMPL_STDBOOL_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 C99 shim for <stdbool.h>
*/
#include "ruby/internal/config.h"
#if defined(__bool_true_false_are_defined)
# /* Take that. */
#elif defined(__cplusplus)
# /* bool is a keyword in C++. */
# if defined(HAVE_STDBOOL_H) && (__cplusplus >= 201103L)
# include <cstdbool>
# endif
#
# ifndef __bool_true_false_are_defined
# define __bool_true_false_are_defined
# endif
#elif defined(HAVE_STDBOOL_H)
# /* Take stdbool.h definition. */
# include <stdbool.h>
#else
typedef unsigned char _Bool;
# /* See also http://www.open-std.org/jtc1/sc22/wg14/www/docs/n2229.htm */
# define bool _Bool
# define true ((_Bool)+1)
# define false ((_Bool)+0)
# define __bool_true_false_are_defined
#endif
#endif /* RBIMPL_STDBOOL_H */