cppmp/include/cppmp/core/checker.inl

#pragma once

#include "checker.h"

namespace cppmp
{

    namespace __impl
    {

        /* bool_pack */

        template<bool...>
        struct bool_pack;

        /* is_specialization_of_impl */

        template<typename T, template <typename...> class T_template>
        struct is_specialization_of_impl
            : public false_t
            { };

        template<template <typename...> class T_template, typename... Ts>
        struct is_specialization_of_impl<T_template<Ts...>, T_template>
            : public true_t
            { };

        /* is_valid */

        template<typename T, std::size_t = sizeof(T)>
        std::true_type is_valid_impl(T *);

        std::false_type is_valid_impl(...);

        template<typename T>
        struct is_valid
            : public decltype(is_valid_impl(std::declval<T*>()))
            { };

        template<>
        struct is_valid<void>
            : public true_t
            { };

    }

    /* is_specialization_of */

    template<typename T, template <typename...> class T_template>
    struct is_specialization_of
        : public __impl::is_specialization_of_impl<T, T_template>
        { };

    /* is_true */

    template<bool... B>
    struct is_true
        : public is_same<__impl::bool_pack<true, B...>, __impl::bool_pack<B..., true>>
        { };

}