mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
synced 2024-11-14 10:39:05 +00:00
31 lines
811 B
C++
31 lines
811 B
C++
#ifndef SPROUT_FUNCTIONAL_NOT1_HPP
|
|
#define SPROUT_FUNCTIONAL_NOT1_HPP
|
|
|
|
#include <functional>
|
|
#include <sprout/config.hpp>
|
|
|
|
namespace sprout {
|
|
// 20.8.8 negators
|
|
template<typename Predicate>
|
|
class unary_negate {
|
|
public:
|
|
typedef typename Predicate::argument_type argument_type;
|
|
typedef bool result_type;
|
|
protected:
|
|
Predicate fn;
|
|
public:
|
|
explicit SPROUT_CONSTEXPR unary_negate(Predicate const& pred)
|
|
: fn(pred)
|
|
{}
|
|
SPROUT_CONSTEXPR bool operator()(typename Predicate::argument_type const& x) const {
|
|
return !fn(x);
|
|
}
|
|
};
|
|
|
|
template<typename Predicate>
|
|
inline SPROUT_CONSTEXPR sprout::unary_negate<Predicate> not1(Predicate const& pred) {
|
|
return sprout::unary_negate<Predicate>(pred);
|
|
}
|
|
} // namespace sprout
|
|
|
|
#endif // #ifndef SPROUT_FUNCTIONAL_NOT1_HPP
|