params.h

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/*
Copyright (c) 2026 MrXie1109
 
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*/
 
#pragma once
#include <type_traits>
#include <utility>
 
namespace console {
    template <class... Ts>
    class Params;

    template <>
    class Params<> {
    public:
        Params() = default;

        template <class F>
        auto apply(F f) const -> decltype(f()) {
            return f();
        }
    };

    template <class T>
    class Params<T> {
        T value; 
 
    public:
        Params(const T &value) : value(value) {}

        template <class F>
        auto apply(F f) const -> decltype(f(value)) {
            return f(value);
        };
    };

    template <class T, class... Rest>
    class Params<T, Rest...> {
        T               value; 
        Params<Rest...> rest;  

        template <class F>
        struct Helper {
            F        f;     
            const T &value; 

            Helper(F f, const T &value) : f(f), value(value) {}

            template <class... Args>
            auto operator()(const Args &...args) const
                -> decltype(f(value, args...)) {
                return f(value, args...);
            }
        };
 
    public:
        Params(const T &value, const Rest &...rest) :
            value(value), rest(rest...) {}

        template <class F>
        auto apply(F f) const -> decltype(rest.apply(Helper<F>(f, value))) {
            return rest.apply(Helper<F>(f, value));
        }
    };

    template <class... Ts>
    Params<typename std::decay<Ts>::type...> params(Ts &&...values) {
        return {std::forward<Ts>(values)...};
    }
}