1 | // (C) Copyright Gennadiy Rozental 2001. |
2 | // Distributed under the Boost Software License, Version 1.0. |
3 | // (See accompanying file LICENSE_1_0.txt or copy at |
4 | // http://www.boost.org/LICENSE_1_0.txt) |
5 | |
6 | // See http://www.boost.org/libs/test for the library home page. |
7 | // |
8 | //! @file |
9 | //! @brief Floating point comparison tolerance manipulators |
10 | //! |
11 | //! This file defines several manipulators for floating point comparison. These |
12 | //! manipulators are intended to be used with BOOST_TEST. |
13 | // *************************************************************************** |
14 | |
15 | #ifndef BOOST_TEST_TOOLS_DETAIL_TOLERANCE_MANIP_HPP_012705GER |
16 | #define BOOST_TEST_TOOLS_DETAIL_TOLERANCE_MANIP_HPP_012705GER |
17 | |
18 | // Boost Test |
19 | #include <boost/test/tools/detail/fwd.hpp> |
20 | #include <boost/test/tools/detail/indirections.hpp> |
21 | |
22 | #include <boost/test/tools/fpc_tolerance.hpp> |
23 | #include <boost/test/tools/floating_point_comparison.hpp> |
24 | |
25 | #include <boost/test/detail/suppress_warnings.hpp> |
26 | |
27 | //____________________________________________________________________________// |
28 | |
29 | namespace boost { |
30 | namespace test_tools { |
31 | namespace tt_detail { |
32 | |
33 | // ************************************************************************** // |
34 | // ************** fpc tolerance manipulator ************** // |
35 | // ************************************************************************** // |
36 | |
37 | template<typename FPT> |
38 | struct tolerance_manip { |
39 | explicit tolerance_manip( FPT const & tol ) : m_value( tol ) {} |
40 | |
41 | FPT m_value; |
42 | }; |
43 | |
44 | //____________________________________________________________________________// |
45 | |
46 | struct tolerance_manip_delay {}; |
47 | |
48 | template<typename FPT> |
49 | inline tolerance_manip<FPT> |
50 | operator%( FPT v, tolerance_manip_delay const& ) |
51 | { |
52 | BOOST_STATIC_ASSERT_MSG( (fpc::tolerance_based<FPT>::value), |
53 | "tolerance should be specified using a floating points type" ); |
54 | |
55 | return tolerance_manip<FPT>( FPT(v / 100) ); |
56 | } |
57 | |
58 | //____________________________________________________________________________// |
59 | |
60 | template<typename E, typename FPT> |
61 | inline assertion_result |
62 | operator<<(assertion_evaluate_t<E> const& ae, tolerance_manip<FPT> const& tol) |
63 | { |
64 | local_fpc_tolerance<FPT> lt( tol.m_value ); |
65 | |
66 | return ae.m_e.evaluate(); |
67 | } |
68 | |
69 | //____________________________________________________________________________// |
70 | |
71 | template<typename FPT> |
72 | inline int |
73 | operator<<( unit_test::lazy_ostream const&, tolerance_manip<FPT> const& ) { return 0; } |
74 | |
75 | //____________________________________________________________________________// |
76 | |
77 | template<typename FPT> |
78 | inline check_type |
79 | operator<<( assertion_type const& /*at*/, tolerance_manip<FPT> const& ) { return CHECK_BUILT_ASSERTION; } |
80 | |
81 | //____________________________________________________________________________// |
82 | |
83 | } // namespace tt_detail |
84 | |
85 | |
86 | /*! Tolerance manipulator |
87 | * |
88 | * These functions return a manipulator that can be used in conjunction with BOOST_TEST |
89 | * in order to specify the tolerance with which floating point comparisons are made. |
90 | */ |
91 | template<typename FPT> |
92 | inline tt_detail::tolerance_manip<FPT> |
93 | tolerance( FPT v ) |
94 | { |
95 | BOOST_STATIC_ASSERT_MSG( (fpc::tolerance_based<FPT>::value), |
96 | "tolerance only for floating points" ); |
97 | |
98 | return tt_detail::tolerance_manip<FPT>( v ); |
99 | } |
100 | |
101 | //____________________________________________________________________________// |
102 | |
103 | //! @overload tolerance( FPT v ) |
104 | template<typename FPT> |
105 | inline tt_detail::tolerance_manip<FPT> |
106 | tolerance( fpc::percent_tolerance_t<FPT> v ) |
107 | { |
108 | BOOST_STATIC_ASSERT_MSG( (fpc::tolerance_based<FPT>::value), |
109 | "tolerance only for floating points" ); |
110 | |
111 | return tt_detail::tolerance_manip<FPT>( static_cast<FPT>(v.m_value / 100) ); |
112 | } |
113 | |
114 | //____________________________________________________________________________// |
115 | |
116 | //! @overload tolerance( FPT v ) |
117 | inline tt_detail::tolerance_manip_delay |
118 | tolerance() |
119 | { |
120 | return tt_detail::tolerance_manip_delay(); |
121 | } |
122 | |
123 | //____________________________________________________________________________// |
124 | |
125 | } // namespace test_tools |
126 | } // namespace boost |
127 | |
128 | #include <boost/test/detail/enable_warnings.hpp> |
129 | |
130 | #endif // BOOST_TEST_TOOLS_DETAIL_TOLERANCE_MANIP_HPP_012705GER |
131 | |