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 | // Description : contains definition for all test tools in test toolbox |
9 | // *************************************************************************** |
10 | |
11 | #ifndef BOOST_TEST_UTILS_LAZY_OSTREAM_HPP |
12 | #define BOOST_TEST_UTILS_LAZY_OSTREAM_HPP |
13 | |
14 | // Boost.Test |
15 | #include <boost/test/detail/config.hpp> |
16 | |
17 | // STL |
18 | #include <iosfwd> |
19 | |
20 | #include <boost/test/detail/suppress_warnings.hpp> |
21 | |
22 | //____________________________________________________________________________// |
23 | |
24 | // ************************************************************************** // |
25 | // ************** lazy_ostream ************** // |
26 | // ************************************************************************** // |
27 | |
28 | namespace boost { |
29 | namespace unit_test { |
30 | |
31 | class lazy_ostream { |
32 | public: |
33 | virtual ~lazy_ostream() {} |
34 | |
35 | static lazy_ostream& instance() { static lazy_ostream inst; return inst; } |
36 | |
37 | friend std::ostream& operator<<( std::ostream& ostr, lazy_ostream const& o ) { return o( ostr ); } |
38 | |
39 | // access method |
40 | bool empty() const { return m_empty; } |
41 | |
42 | // actual printing interface; to be accessed only by this class and children |
43 | virtual std::ostream& operator()( std::ostream& ostr ) const { return ostr; } |
44 | protected: |
45 | explicit lazy_ostream( bool p_empty = true ) : m_empty( p_empty ) {} |
46 | |
47 | private: |
48 | // Data members |
49 | bool m_empty; |
50 | }; |
51 | |
52 | //____________________________________________________________________________// |
53 | |
54 | template<typename PrevType, typename T, typename StorageT=T const&> |
55 | class lazy_ostream_impl : public lazy_ostream { |
56 | public: |
57 | lazy_ostream_impl( PrevType const& prev, T const& value ) |
58 | : lazy_ostream( false ) |
59 | , m_prev( prev ) |
60 | , m_value( value ) |
61 | { |
62 | } |
63 | |
64 | virtual std::ostream& operator()( std::ostream& ostr ) const |
65 | { |
66 | return m_prev(ostr) << m_value; |
67 | } |
68 | private: |
69 | // Data members |
70 | PrevType const& m_prev; |
71 | StorageT m_value; |
72 | }; |
73 | |
74 | //____________________________________________________________________________// |
75 | |
76 | template<typename T> |
77 | inline lazy_ostream_impl<lazy_ostream,T> |
78 | operator<<( lazy_ostream const& prev, T const& v ) |
79 | { |
80 | return lazy_ostream_impl<lazy_ostream,T>( prev, v ); |
81 | } |
82 | |
83 | //____________________________________________________________________________// |
84 | |
85 | template<typename PrevPrevType, typename TPrev, typename T> |
86 | inline lazy_ostream_impl<lazy_ostream_impl<PrevPrevType,TPrev>,T> |
87 | operator<<( lazy_ostream_impl<PrevPrevType,TPrev> const& prev, T const& v ) |
88 | { |
89 | typedef lazy_ostream_impl<PrevPrevType,TPrev> PrevType; |
90 | return lazy_ostream_impl<PrevType,T>( prev, v ); |
91 | } |
92 | |
93 | //____________________________________________________________________________// |
94 | |
95 | #if BOOST_TEST_USE_STD_LOCALE |
96 | |
97 | template<typename R,typename S> |
98 | inline lazy_ostream_impl<lazy_ostream,R& (BOOST_TEST_CALL_DECL *)(S&),R& (BOOST_TEST_CALL_DECL *)(S&)> |
99 | operator<<( lazy_ostream const& prev, R& (BOOST_TEST_CALL_DECL *man)(S&) ) |
100 | { |
101 | typedef R& (BOOST_TEST_CALL_DECL * ManipType)(S&); |
102 | |
103 | return lazy_ostream_impl<lazy_ostream,ManipType,ManipType>( prev, man ); |
104 | } |
105 | |
106 | //____________________________________________________________________________// |
107 | |
108 | template<typename PrevPrevType, typename TPrev,typename R,typename S> |
109 | inline lazy_ostream_impl<lazy_ostream_impl<PrevPrevType,TPrev>,R& (BOOST_TEST_CALL_DECL *)(S&),R& (BOOST_TEST_CALL_DECL *)(S&)> |
110 | operator<<( lazy_ostream_impl<PrevPrevType,TPrev> const& prev, R& (BOOST_TEST_CALL_DECL *man)(S&) ) |
111 | { |
112 | typedef R& (BOOST_TEST_CALL_DECL * ManipType)(S&); |
113 | |
114 | return lazy_ostream_impl<lazy_ostream_impl<PrevPrevType,TPrev>,ManipType,ManipType>( prev, man ); |
115 | } |
116 | |
117 | //____________________________________________________________________________// |
118 | |
119 | #endif |
120 | |
121 | #define BOOST_TEST_LAZY_MSG( M ) (::boost::unit_test::lazy_ostream::instance() << M) |
122 | |
123 | } // namespace unit_test |
124 | } // namespace boost |
125 | |
126 | #include <boost/test/detail/enable_warnings.hpp> |
127 | |
128 | #endif // BOOST_TEST_UTILS_LAZY_OSTREAM_HPP |
129 | |