Truth.hpp

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#pragma once    // Source encoding: UTF-8 with BOM (π is a lowercase Greek "pi").

#include <cppx-core/language/syntax/macro-use.hpp>          // CPPX_USE_STD
#include <cppx-core/language/tmp/basic-Enable_if_.hpp>      // cppx::Enable_if_

#include <type_traits>      // std::is_same_v

namespace cppx
{
    CPPX_USE_STD( enable_if_t, is_same_v );

    class Truth
    {
        bool        m_value;

        template< class T >
        static constexpr bool is_bool_ = std::is_same_v<T, bool>;

    public:
        template<
            class Result,
            class = Enable_if_<is_bool_<Result>>
            >
        constexpr operator Result() const noexcept { return m_value; }

        template<
            class Arg,
            class = Enable_if_<is_bool_<Arg>>
            >
        constexpr Truth( const Arg value ) noexcept: m_value( value ) {}
    };
}  // namespace cppx