#ifndef RBIMPL_CAST_H /*-*-C++-*-vi:se ft=cpp:*/
#define RBIMPL_CAST_H
/**
* @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_CAST.
*
* This casting macro makes sense only inside of other macros that are part of
* public headers. They could be used from C++, and C-style casts could issue
* warnings. Ruby internals are pure C so they should not bother.
*/
#include "ruby/internal/compiler_since.h"
#include "ruby/internal/has/warning.h"
#include "ruby/internal/warning_push.h"
#if ! defined(__cplusplus)
# define RBIMPL_CAST(expr) (expr)
#elif RBIMPL_COMPILER_SINCE(GCC, 4, 6, 0)
# /* g++ has -Wold-style-cast since 1997 or so, but its _Pragma is broken. */
# /* See https://gcc.godbolt.org/z/XWhU6J */
# define RBIMPL_CAST(expr) (expr)
# pragma GCC diagnostic ignored "-Wold-style-cast"
#elif RBIMPL_HAS_WARNING("-Wold-style-cast")
# define RBIMPL_CAST(expr) \
RBIMPL_WARNING_PUSH() \
RBIMPL_WARNING_IGNORED(-Wold-style-cast) \
(expr) \
RBIMPL_WARNING_POP()
#else
# define RBIMPL_CAST(expr) (expr)
#endif
#endif /* RBIMPL_CAST_H */
