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[sprout.functional] add is_transparent_function metafunction

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bolero-MURAKAMI 2013-10-26 19:09:10 +09:00
parent f1c0774f7a
commit 2a57ee6af5
42 changed files with 102 additions and 240 deletions
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14
sprout/functional/polymorphic/negate.hpp
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@ -8,25 +8,15 @@
#ifndef SPROUT_FUNCTIONAL_POLYMORPHIC_NEGATE_HPP
#define SPROUT_FUNCTIONAL_POLYMORPHIC_NEGATE_HPP
#include <utility>
#include <sprout/config.hpp>
#include <sprout/utility/forward.hpp>
#include <sprout/functional/negate.hpp>
namespace sprout {
//
// negate_t
// negate_
//
struct negate_t {
public:
template<typename T>
SPROUT_CONSTEXPR decltype(-std::declval<T>())
operator()(T&& x)
const SPROUT_NOEXCEPT_EXPR(SPROUT_NOEXCEPT_EXPR(-std::declval<T>()))
{
return -sprout::forward<T>(x);
}
};
typedef sprout::negate<> negate_t;
namespace {
SPROUT_STATIC_CONSTEXPR sprout::negate_t negate_ = {};
} // anonymous-namespace