kpr/function/RecLambda.hpp

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• Last update: 2023-04-04 01:42:52+09:00
• Include: #include "kpr/function/RecLambda.hpp"

Required by

• kpr/all.hpp
• kpr/all/all.hpp
• kpr/function/function.hpp

Code

#pragma once
#include <type_traits>
#include <utility>

namespace kpr {
    // 再帰可能関数クラス

    template<class F>
    struct RecLambda {
        using value_type = F;

    private:
        F func;

    public:
        template<class G>
        constexpr RecLambda(G&& func) noexcept: func(std::forward<G>(func)) {}

        template<class... Args>
        constexpr decltype(auto) operator ()(Args&&... args) const noexcept(noexcept(func(*this, std::forward<Args>(args)...))) {
            return func(*this, std::forward<Args>(args)...);
        }
    };

    template<class F>
    RecLambda(F&&) -> RecLambda<std::decay_t<F>>;
} // namespace kpr

#line 2 "kpr/function/RecLambda.hpp"
#include <type_traits>
#include <utility>

namespace kpr {
    // 再帰可能関数クラス

    template<class F>
    struct RecLambda {
        using value_type = F;

    private:
        F func;

    public:
        template<class G>
        constexpr RecLambda(G&& func) noexcept: func(std::forward<G>(func)) {}

        template<class... Args>
        constexpr decltype(auto) operator ()(Args&&... args) const noexcept(noexcept(func(*this, std::forward<Args>(args)...))) {
            return func(*this, std::forward<Args>(args)...);
        }
    };

    template<class F>
    RecLambda(F&&) -> RecLambda<std::decay_t<F>>;
} // namespace kpr

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