Sprout/sprout/static_warning.hpp

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2014-03-01 01:35:24 +00:00
/*=============================================================================
Copyright (c) 2011-2014 Bolero MURAKAMI
https://github.com/bolero-MURAKAMI/Sprout
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
=============================================================================*/
#ifndef SPROUT_STATIC_WARNING_HPP
#define SPROUT_STATIC_WARNING_HPP
#include <sprout/config.hpp>
namespace sprout {
//
// static_warning
//
template<bool C>
struct static_warning;
template<>
struct static_warning<true> {
template<typename Message>
static void warn() {}
};
template <>
struct static_warning<false> {
template<typename Message>
static void warn() {
Message static_warning_failed;
}
};
} // namespace sprout
//
// SPROUT_STATIC_WARNING
//
#define SPROUT_STATIC_WARNING_IMPL_2(cond, msg, line) \
struct sprout_static_warning_line_ ## line { \
struct msg {}; \
sprout_static_warning_line_ ## line() { \
::sprout::static_warning<(cond)>:: \
warn<void***** (msg::*****)()>(); \
} \
}
#define SPROUT_STATIC_WARNING_IMPL(cond, msg) \
SPROUT_STATIC_WARNING_IMPL_2(cond, msg, __LINE__)
#define SPROUT_STATIC_WARNING(cond) \
SPROUT_STATIC_WARNING_IMPL(cond, static_warning_failed)
#endif // #ifndef SPROUT_STATIC_WARNING_HPP