reference_wrapper.hpp

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#ifndef BSL_REFERENCE_WRAPPER_HPP
#define BSL_REFERENCE_WRAPPER_HPP

#include "addressof.hpp"
#include "forward.hpp"
#include "invoke_result.hpp"

namespace bsl
{
    template<typename T>
    class reference_wrapper final
    {
        T *m_ptr;

    public:
        using type = T;

        explicit constexpr reference_wrapper(T &val) noexcept : m_ptr{addressof(val)}
        {}

        [[nodiscard]] constexpr T &
        get() const noexcept
        {
            return *m_ptr;
        }

        template<typename... ARGS>
        [[nodiscard]] constexpr invoke_result_t<T &, ARGS...>
        operator()(ARGS &&... a) const
        {
            return invoke(this->get(), bsl::forward<ARGS>(a)...);
        }
    };
}

#endif