1 // Copyright (C) 2003, Fernando Luis Cacciola Carballal.
2 //
3 // Distributed under the Boost Software License, Version 1.0. (See
4 // accompanying file LICENSE_1_0.txt or copy at
5 // http://www.boost.org/LICENSE_1_0.txt)
6 //
7
8
9 //
10 // NOTE: This file is intended to be used ONLY by the test files
11 // from the Numeric Conversions Library
12 //
13
14 // The conversion test is performed using a class whose instances encapsulate
15 // a particular specific conversion defnied explicitely.
16 // A ConversionInstance object includes the source type, the target type,
17 // the source value and the expected result, including possible exceptions.
18 //
19
20 enum PostCondition { c_converted, c_overflow, c_neg_overflow, c_pos_overflow } ;
21
22 template<class Converter>
23 struct ConversionInstance
24 {
25 typedef Converter converter ;
26
27 typedef typename Converter::argument_type argument_type ;
28 typedef typename Converter::result_type result_type ;
29
30 typedef typename Converter::traits traits ;
31 typedef typename traits::target_type target_type ;
32 typedef typename traits::source_type source_type ;
33
ConversionInstanceConversionInstance34 ConversionInstance ( result_type a_result, argument_type a_source, PostCondition a_post)
35 :
36 source(a_source),
37 result(a_result),
38 post(a_post)
39 {}
40
to_stringConversionInstance41 std::string to_string() const
42 {
43 return std::string("converter<")
44 + typeid(target_type).name()
45 + std::string(",")
46 + typeid(source_type).name()
47 + std::string(">::convert(") ;
48 }
49
50 argument_type source ;
51 result_type result ;
52 PostCondition post ;
53 } ;
54
55 //
56 // Main conversion test point.
57 // Exercises a specific conversion described by 'conv'.
58 //
59 template<class Instance>
test_conv_base(Instance const & conv)60 void test_conv_base( Instance const& conv )
61 {
62 typedef typename Instance::argument_type argument_type ;
63 typedef typename Instance::result_type result_type ;
64 typedef typename Instance::converter converter ;
65
66 argument_type source = conv.source ;
67
68 try
69 {
70 result_type result = converter::convert(source);
71
72 if ( conv.post == c_converted )
73 {
74 BOOST_CHECK_MESSAGE( result == conv.result,
75 conv.to_string() << printable(source) << ")= " << printable(result) << ". Expected:" << printable(conv.result)
76 ) ;
77 }
78 else
79 {
80 BOOST_ERROR( conv.to_string() << printable(source) << ") = " << printable(result)
81 << ". Expected:" << ( conv.post == c_neg_overflow ? " negative_overflow" : "positive_overflow" )
82 ) ;
83 }
84 }
85 catch ( boost::numeric::negative_overflow const& )
86 {
87 if ( conv.post == c_neg_overflow )
88 {
89 BOOST_CHECK_MESSAGE( true, conv.to_string() << printable(source) << ") = negative_overflow, as expected" ) ;
90 }
91 else
92 {
93 BOOST_ERROR( conv.to_string() << printable(source) << ") = negative_overflow. Expected:" << printable(conv.result) ) ;
94 }
95 }
96 catch ( boost::numeric::positive_overflow const& )
97 {
98 if ( conv.post == c_pos_overflow )
99 {
100 BOOST_CHECK_MESSAGE( true, conv.to_string() << printable(source) << ") = positive_overflow, as expected" ) ;
101 }
102 else
103 {
104 BOOST_ERROR( conv.to_string() << printable(source) << ") = positive_overflow. Expected:" << printable(conv.result) ) ;
105 }
106 }
107 catch ( boost::numeric::bad_numeric_cast const& )
108 {
109 if ( conv.post == c_overflow )
110 {
111 BOOST_CHECK_MESSAGE( true, conv.to_string() << printable(source) << ") = bad_numeric_cast, as expected" ) ;
112 }
113 else
114 {
115 BOOST_ERROR( conv.to_string() << printable(source) << ") = bad_numeric_cast. Expected:" << printable(conv.result) ) ;
116 }
117 }
118 }
119
120
121 #define TEST_SUCCEEDING_CONVERSION(Conv,typeT,typeS,valueT,valueS) \
122 test_conv_base( ConversionInstance< Conv >(valueT, valueS, c_converted ) )
123
124 #define TEST_POS_OVERFLOW_CONVERSION(Conv,typeT,typeS,valueS) \
125 test_conv_base( ConversionInstance< Conv >( static_cast< typeT >(0), valueS, c_pos_overflow ) )
126
127 #define TEST_NEG_OVERFLOW_CONVERSION(Conv,typeT,typeS,valueS) \
128 test_conv_base( ConversionInstance< Conv >( static_cast< typeT >(0), valueS, c_neg_overflow ) )
129
130 #define DEF_CONVERTER(T,S) boost::numeric::converter< T , S >
131
132 #define TEST_SUCCEEDING_CONVERSION_DEF(typeT,typeS,valueT,valueS) \
133 TEST_SUCCEEDING_CONVERSION( DEF_CONVERTER(typeT,typeS), typeT, typeS, valueT, valueS )
134
135 #define TEST_POS_OVERFLOW_CONVERSION_DEF(typeT,typeS,valueS) \
136 TEST_POS_OVERFLOW_CONVERSION( DEF_CONVERTER(typeT,typeS), typeT, typeS, valueS )
137
138 #define TEST_NEG_OVERFLOW_CONVERSION_DEF(typeT,typeS,valueS) \
139 TEST_NEG_OVERFLOW_CONVERSION( DEF_CONVERTER(typeT,typeS), typeT, typeS, valueS )
140
141
142 //
143 ///////////////////////////////////////////////////////////////////////////////////////////////
144
145