| 1 | /* |
|---|---|
| 2 | * Copyright Andrey Semashev 2014. |
| 3 | * Distributed under the Boost Software License, Version 1.0. |
| 4 | * (See accompanying file LICENSE_1_0.txt or copy at |
| 5 | * http://www.boost.org/LICENSE_1_0.txt) |
| 6 | */ |
| 7 | /*! |
| 8 | * \file underlying_type.cpp |
| 9 | * \author Andrey Semashev |
| 10 | * \date 06.06.2014 |
| 11 | * |
| 12 | * \brief This test checks that underlying_type trait works. |
| 13 | */ |
| 14 | |
| 15 | #include <boost/core/underlying_type.hpp> |
| 16 | #include <boost/core/scoped_enum.hpp> |
| 17 | #include <boost/core/lightweight_test_trait.hpp> |
| 18 | #include <boost/type_traits/is_same.hpp> |
| 19 | #include <boost/config.hpp> |
| 20 | |
| 21 | #if defined(_MSC_VER) |
| 22 | # pragma warning(disable: 4244) // conversion from enum_type to underlying_type |
| 23 | #endif |
| 24 | |
| 25 | BOOST_SCOPED_ENUM_UT_DECLARE_BEGIN(emulated_enum, unsigned char) |
| 26 | { |
| 27 | value0, |
| 28 | value1, |
| 29 | value2 |
| 30 | } |
| 31 | BOOST_SCOPED_ENUM_DECLARE_END(emulated_enum) |
| 32 | |
| 33 | #if !defined(BOOST_NO_CXX11_SCOPED_ENUMS) |
| 34 | |
| 35 | enum class native_enum : unsigned short |
| 36 | { |
| 37 | value0, |
| 38 | value1, |
| 39 | value2 |
| 40 | }; |
| 41 | |
| 42 | #endif |
| 43 | |
| 44 | #if defined(BOOST_NO_UNDERLYING_TYPE) |
| 45 | namespace boost { |
| 46 | |
| 47 | template< > |
| 48 | struct underlying_type< emulated_enum > |
| 49 | { |
| 50 | typedef unsigned char type; |
| 51 | }; |
| 52 | |
| 53 | #if !defined(BOOST_NO_CXX11_SCOPED_ENUMS) |
| 54 | template< > |
| 55 | struct underlying_type< native_enum > |
| 56 | { |
| 57 | typedef unsigned short type; |
| 58 | }; |
| 59 | #endif |
| 60 | |
| 61 | } // namespace boost |
| 62 | #endif |
| 63 | |
| 64 | int main(int, char*[]) |
| 65 | { |
| 66 | BOOST_TEST_TRAIT_TRUE((boost::is_same< boost::underlying_type< emulated_enum >::type, unsigned char >)); |
| 67 | #if !defined(BOOST_NO_CXX11_SCOPED_ENUMS) |
| 68 | BOOST_TEST_TRAIT_TRUE((boost::is_same< boost::underlying_type< native_enum >::type, unsigned short >)); |
| 69 | #endif |
| 70 | |
| 71 | return boost::report_errors(); |
| 72 | } |
| 73 |