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PATH: opt / cpanel / ea-ruby27 / src / passenger-release-6.1.2 / src / cxx_supportlib / vendor-modified / boost / core

/*
Copyright 2021-2023 Glen Joseph Fernandes
(glenjofe@gmail.com)

Distributed under the Boost Software License, Version 1.0.
(http://www.boost.org/LICENSE_1_0.txt)
*/
#ifndef BOOST_CORE_IDENTITY_HPP
#define BOOST_CORE_IDENTITY_HPP

#include <boost/config.hpp>
#if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
#include <utility>
#endif

namespace boost {

struct identity {
    typedef void is_transparent;

#if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
    template<class T>
    BOOST_CONSTEXPR T&& operator()(T&& value) const BOOST_NOEXCEPT {
        return std::forward<T>(value);
    }
#else
    template<class T>
    BOOST_CONSTEXPR const T& operator()(const T& value) const BOOST_NOEXCEPT {
        return value;
    }

template<class T>
    BOOST_CONSTEXPR T& operator()(T& value) const BOOST_NOEXCEPT {
        return value;
    }
#endif

template<class>
    struct result { };

template<class T>
    struct result<identity(T&)> {
        typedef T& type;
    };

#if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
    template<class T>
    struct result<identity(T)> {
        typedef T&& type;
    };

template<class T>
    struct result<identity(T&&)> {
        typedef T&& type;
    };
#endif
};

} /* boost */

#endif

[-] ref.hpp [edit]
[-] default_allocator.hpp [edit]
[-] allocator_access.hpp [edit]
[-] no_exceptions_support.hpp [edit]
[-] uncaught_exceptions.hpp [edit]
[-] invoke_swap.hpp [edit]
[-] quick_exit.hpp [edit]
[-] launder.hpp [edit]
[-] swap.hpp [edit]
[-] enable_if.hpp [edit]
[-] first_scalar.hpp [edit]
[-] memory_resource.hpp [edit]
[-] make_span.hpp [edit]
[-] scoped_enum.hpp [edit]
[-] exchange.hpp [edit]
[-] cmath.hpp [edit]
[-] lightweight_test_trait.hpp [edit]
[-] max_align.hpp [edit]
[-] demangle.hpp [edit]
[-] noinit_adaptor.hpp [edit]
[-] empty_value.hpp [edit]
[+] ..
[-] underlying_type.hpp [edit]
[-] null_deleter.hpp [edit]
[-] data.hpp [edit]
[-] allocator_traits.hpp [edit]
[-] is_same.hpp [edit]
[-] verbose_terminate_handler.hpp [edit]
[-] fclose_deleter.hpp [edit]
[-] span.hpp [edit]
[-] lightweight_test.hpp [edit]
[-] use_default.hpp [edit]
[-] alignof.hpp [edit]
[-] size.hpp [edit]
[-] checked_delete.hpp [edit]
[-] typeinfo.hpp [edit]
[-] nvp.hpp [edit]
[-] serialization.hpp [edit]
[-] snprintf.hpp [edit]
[-] type_name.hpp [edit]
[-] addressof.hpp [edit]
[-] explicit_operator_bool.hpp [edit]
[-] yield_primitives.hpp [edit]
[-] pointer_in_range.hpp [edit]
[+] detail
[-] pointer_traits.hpp [edit]
[-] identity.hpp [edit]
[-] alloc_construct.hpp [edit]
[-] ignore_unused.hpp [edit]
[-] bit.hpp [edit]
[-] noncopyable.hpp [edit]
[-] functor.hpp [edit]