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#ifndef RBIMPL_WARNING_PUSH_H /*-*-C++-*-vi:se ft=cpp:*/
#define RBIMPL_WARNING_PUSH_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_WARNING_PUSH.
*
* ### Q&A ###
*
* Q: Why all the macros defined in this file are function-like macros?
*
* A: Sigh. This is because of Doxygen. Its `SKIP_FUNCTION_MACROS = YES`
* configuration setting requests us that if we want it to ignore these
* macros, then we have to do two things: (1) let them be defined as
* function-like macros, and (2) place them separately in their own line,
* like below:
*
* ```CXX
* // NG -- foo's type considered something like `unsigned int`.
* RBIMPL_WARNING_PUSH
* int foo(void);
* RBIMPL_WARNING_POP
*
* // OK -- the macros are ignored by Doxygen.
* RBIMPL_WARNING_PUSH()
* int foo(void);
* RBIMPL_WARNING_POP()
* ```
*/
#include "ruby/internal/compiler_is.h"
#include "ruby/internal/compiler_since.h"
#if defined(__DOXYGEN__)
/**
* @private
*
* Pushes compiler warning state.
*/
#define RBIMPL_WARNING_PUSH() __pragma(warning(push))
/**
* @private
*
* Pops compiler warning state.
*/
#define RBIMPL_WARNING_POP() __pragma(warning(pop))
/**
* @private
*
* Turns a warning into a fatal error.
*
* @param flag A flag that represents the kind of warnings.
*/
#define RBIMPL_WARNING_ERROR(flag) __pragma(warning(error: flag))
/**
* @private
*
* Suppresses a warning.
*
* @param flag A flag that represents the kind of warnings.
*/
#define RBIMPL_WARNING_IGNORED(flag) __pragma(warning(disable: flag))
#elif RBIMPL_COMPILER_SINCE(MSVC, 12, 0, 0)
# /* Not sure exactly when but it seems VC++ 6.0 is a version with it.*/
# define RBIMPL_WARNING_PUSH() __pragma(warning(push))
# define RBIMPL_WARNING_POP() __pragma(warning(pop))
# define RBIMPL_WARNING_ERROR(flag) __pragma(warning(error: flag))
# define RBIMPL_WARNING_IGNORED(flag) __pragma(warning(disable: flag))
#elif RBIMPL_COMPILER_SINCE(Intel, 13, 0, 0)
# define RBIMPL_WARNING_PUSH() __pragma(warning(push))
# define RBIMPL_WARNING_POP() __pragma(warning(pop))
# define RBIMPL_WARNING_ERROR(flag) __pragma(warning(error: flag))
# define RBIMPL_WARNING_IGNORED(flag) __pragma(warning(disable: flag))
#elif RBIMPL_COMPILER_IS(Clang) || RBIMPL_COMPILER_IS(Apple)
# /* Not sure exactly when but it seems LLVM 2.6.0 is a version with it. */
# define RBIMPL_WARNING_PRAGMA0(x) _Pragma(# x)
# define RBIMPL_WARNING_PRAGMA1(x) RBIMPL_WARNING_PRAGMA0(clang diagnostic x)
# define RBIMPL_WARNING_PRAGMA2(x, y) RBIMPL_WARNING_PRAGMA1(x # y)
# define RBIMPL_WARNING_PUSH() RBIMPL_WARNING_PRAGMA1(push)
# define RBIMPL_WARNING_POP() RBIMPL_WARNING_PRAGMA1(pop)
# define RBIMPL_WARNING_ERROR(flag) RBIMPL_WARNING_PRAGMA2(error, flag)
# define RBIMPL_WARNING_IGNORED(flag) RBIMPL_WARNING_PRAGMA2(ignored, flag)
#elif RBIMPL_COMPILER_SINCE(GCC, 4, 6, 0)
# /* https://gcc.gnu.org/onlinedocs/gcc-4.6.0/gcc/Diagnostic-Pragmas.html */
# define RBIMPL_WARNING_PRAGMA0(x) _Pragma(# x)
# define RBIMPL_WARNING_PRAGMA1(x) RBIMPL_WARNING_PRAGMA0(GCC diagnostic x)
# define RBIMPL_WARNING_PRAGMA2(x, y) RBIMPL_WARNING_PRAGMA1(x # y)
# define RBIMPL_WARNING_PUSH() RBIMPL_WARNING_PRAGMA1(push)
# define RBIMPL_WARNING_POP() RBIMPL_WARNING_PRAGMA1(pop)
# define RBIMPL_WARNING_ERROR(flag) RBIMPL_WARNING_PRAGMA2(error, flag)
# define RBIMPL_WARNING_IGNORED(flag) RBIMPL_WARNING_PRAGMA2(ignored, flag)
#else
# /* :FIXME: improve here */
# define RBIMPL_WARNING_PUSH() /* void */
# define RBIMPL_WARNING_POP() /* void */
# define RBIMPL_WARNING_ERROR(flag) /* void */
# define RBIMPL_WARNING_IGNORED(flag) /* void */
#endif /* _MSC_VER */
/** @endcond */
#endif /* RBIMPL_WARNING_PUSH_H */
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