1#ifndef BOOST_CORE_LIGHTWEIGHT_TEST_TRAIT_HPP
2#define BOOST_CORE_LIGHTWEIGHT_TEST_TRAIT_HPP
3
4// MS compatible compilers support #pragma once
5
6#if defined(_MSC_VER)
7# pragma once
8#endif
9
10// boost/core/lightweight_test_trait.hpp
11//
12// BOOST_TEST_TRAIT_TRUE, BOOST_TEST_TRAIT_FALSE, BOOST_TEST_TRAIT_SAME
13//
14// Copyright 2014, 2021 Peter Dimov
15//
16// Copyright 2019 Glen Joseph Fernandes
17// (glenjofe@gmail.com)
18//
19// Distributed under the Boost Software License, Version 1.0.
20// See accompanying file LICENSE_1_0.txt or copy at
21// http://www.boost.org/LICENSE_1_0.txt
22
23#include <boost/core/lightweight_test.hpp>
24#include <boost/core/type_name.hpp>
25#include <boost/core/detail/is_same.hpp>
26#include <boost/config.hpp>
27
28namespace boost
29{
30namespace detail
31{
32
33template< class T > inline void test_trait_impl( char const * trait, void (*)( T ),
34 bool expected, char const * file, int line, char const * function )
35{
36 if( T::value == expected )
37 {
38 test_results();
39 }
40 else
41 {
42 BOOST_LIGHTWEIGHT_TEST_OSTREAM
43 << file << "(" << line << "): predicate '" << trait << "' ["
44 << boost::core::type_name<T>() << "]"
45 << " test failed in function '" << function
46 << "' (should have been " << ( expected? "true": "false" ) << ")"
47 << std::endl;
48
49 ++test_results().errors();
50 }
51}
52
53template<class T> inline bool test_trait_same_impl_( T )
54{
55 return T::value;
56}
57
58template<class T1, class T2> inline void test_trait_same_impl( char const * types,
59 boost::core::detail::is_same<T1, T2> same, char const * file, int line, char const * function )
60{
61 if( test_trait_same_impl_( same ) )
62 {
63 test_results();
64 }
65 else
66 {
67 BOOST_LIGHTWEIGHT_TEST_OSTREAM
68 << file << "(" << line << "): test 'is_same<" << types << ">'"
69 << " failed in function '" << function
70 << "' ('" << boost::core::type_name<T1>()
71 << "' != '" << boost::core::type_name<T2>() << "')"
72 << std::endl;
73
74 ++test_results().errors();
75 }
76}
77
78} // namespace detail
79} // namespace boost
80
81#define BOOST_TEST_TRAIT_TRUE(type) ( ::boost::detail::test_trait_impl(#type, (void(*)type)0, true, __FILE__, __LINE__, BOOST_CURRENT_FUNCTION) )
82#define BOOST_TEST_TRAIT_FALSE(type) ( ::boost::detail::test_trait_impl(#type, (void(*)type)0, false, __FILE__, __LINE__, BOOST_CURRENT_FUNCTION) )
83
84#if defined(__GNUC__)
85// ignoring -Wvariadic-macros with #pragma doesn't work under GCC
86# pragma GCC system_header
87#endif
88
89#define BOOST_TEST_TRAIT_SAME(...) ( ::boost::detail::test_trait_same_impl(#__VA_ARGS__, ::boost::core::detail::is_same< __VA_ARGS__ >(), __FILE__, __LINE__, BOOST_CURRENT_FUNCTION) )
90
91#endif // #ifndef BOOST_CORE_LIGHTWEIGHT_TEST_TRAIT_HPP
92

source code of boost/libs/core/include/boost/core/lightweight_test_trait.hpp