1 | // Unit test for boost::lexical_cast. |
2 | // |
3 | // See http://www.boost.org for most recent version, including documentation. |
4 | // |
5 | // Copyright Antony Polukhin, 2011-2024. |
6 | // |
7 | // Distributed under the Boost |
8 | // Software License, Version 1.0. (See accompanying file |
9 | // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt). |
10 | |
11 | #include <boost/lexical_cast.hpp> |
12 | |
13 | #include <boost/core/lightweight_test.hpp> |
14 | |
15 | #include <iostream> |
16 | |
17 | |
18 | ///////////////////////// char streamable classes /////////////////////////////////////////// |
19 | |
20 | struct streamable_easy { enum ENU {value = 0}; }; |
21 | std::ostream& operator << (std::ostream& ostr, const streamable_easy&) { |
22 | return ostr << streamable_easy::value; |
23 | } |
24 | std::istream& operator >> (std::istream& istr, const streamable_easy&) { |
25 | int i; istr >> i; BOOST_TEST_EQ(i, streamable_easy::value); |
26 | return istr; |
27 | } |
28 | |
29 | struct streamable_medium { enum ENU {value = 1}; }; |
30 | template <class CharT> |
31 | typename boost::enable_if<boost::is_same<CharT, char>, std::basic_ostream<CharT>&>::type |
32 | operator << (std::basic_ostream<CharT>& ostr, const streamable_medium&) { |
33 | return ostr << streamable_medium::value; |
34 | } |
35 | template <class CharT> |
36 | typename boost::enable_if<boost::is_same<CharT, char>, std::basic_istream<CharT>&>::type |
37 | operator >> (std::basic_istream<CharT>& istr, const streamable_medium&) { |
38 | int i; istr >> i; BOOST_TEST_EQ(i, streamable_medium::value); |
39 | return istr; |
40 | } |
41 | |
42 | struct streamable_hard { enum ENU {value = 2}; }; |
43 | template <class CharT, class TraitsT> |
44 | typename boost::enable_if<boost::is_same<CharT, char>, std::basic_ostream<CharT, TraitsT>&>::type |
45 | operator << (std::basic_ostream<CharT, TraitsT>& ostr, const streamable_hard&) { |
46 | return ostr << streamable_hard::value; |
47 | } |
48 | template <class CharT, class TraitsT> |
49 | typename boost::enable_if<boost::is_same<CharT, char>, std::basic_istream<CharT, TraitsT>&>::type |
50 | operator >> (std::basic_istream<CharT, TraitsT>& istr, const streamable_hard&) { |
51 | int i; istr >> i; BOOST_TEST_EQ(i, streamable_hard::value); |
52 | return istr; |
53 | } |
54 | |
55 | struct streamable_hard2 { enum ENU {value = 3}; }; |
56 | template <class TraitsT> |
57 | std::basic_ostream<char, TraitsT>& operator << (std::basic_ostream<char, TraitsT>& ostr, const streamable_hard2&) { |
58 | return ostr << streamable_hard2::value; |
59 | } |
60 | template <class TraitsT> |
61 | std::basic_istream<char, TraitsT>& operator >> (std::basic_istream<char, TraitsT>& istr, const streamable_hard2&) { |
62 | int i; istr >> i; BOOST_TEST_EQ(i, streamable_hard2::value); |
63 | return istr; |
64 | } |
65 | |
66 | |
67 | ///////////////////////// wchar_t streamable classes /////////////////////////////////////////// |
68 | |
69 | struct wstreamable_easy { enum ENU {value = 4}; }; |
70 | std::wostream& operator << (std::wostream& ostr, const wstreamable_easy&) { |
71 | return ostr << wstreamable_easy::value; |
72 | } |
73 | std::wistream& operator >> (std::wistream& istr, const wstreamable_easy&) { |
74 | int i; istr >> i; BOOST_TEST_EQ(i, wstreamable_easy::value); |
75 | return istr; |
76 | } |
77 | |
78 | struct wstreamable_medium { enum ENU {value = 5}; }; |
79 | template <class CharT> |
80 | typename boost::enable_if<boost::is_same<CharT, wchar_t>, std::basic_ostream<CharT>& >::type |
81 | operator << (std::basic_ostream<CharT>& ostr, const wstreamable_medium&) { |
82 | return ostr << wstreamable_medium::value; |
83 | } |
84 | template <class CharT> |
85 | typename boost::enable_if<boost::is_same<CharT, wchar_t>, std::basic_istream<CharT>& >::type |
86 | operator >> (std::basic_istream<CharT>& istr, const wstreamable_medium&) { |
87 | int i; istr >> i; BOOST_TEST_EQ(i, wstreamable_medium::value); |
88 | return istr; |
89 | } |
90 | |
91 | struct wstreamable_hard { enum ENU {value = 6}; }; |
92 | template <class CharT, class TraitsT> |
93 | typename boost::enable_if<boost::is_same<CharT, wchar_t>, std::basic_ostream<CharT, TraitsT>&>::type |
94 | operator << (std::basic_ostream<CharT, TraitsT>& ostr, const wstreamable_hard&) { |
95 | return ostr << wstreamable_hard::value; |
96 | } |
97 | template <class CharT, class TraitsT> |
98 | typename boost::enable_if<boost::is_same<CharT, wchar_t>, std::basic_istream<CharT, TraitsT>&>::type |
99 | operator >> (std::basic_istream<CharT, TraitsT>& istr, const wstreamable_hard&) { |
100 | int i; istr >> i; BOOST_TEST_EQ(i, wstreamable_hard::value); |
101 | return istr; |
102 | } |
103 | |
104 | struct wstreamable_hard2 { enum ENU {value = 7}; }; |
105 | template <class TraitsT> |
106 | std::basic_ostream<wchar_t, TraitsT>& operator << (std::basic_ostream<wchar_t, TraitsT>& ostr, const wstreamable_hard2&) { |
107 | return ostr << wstreamable_hard2::value; |
108 | } |
109 | template <class TraitsT> |
110 | std::basic_istream<wchar_t, TraitsT>& operator >> (std::basic_istream<wchar_t, TraitsT>& istr, const wstreamable_hard2&) { |
111 | int i; istr >> i; BOOST_TEST_EQ(i, wstreamable_hard2::value); |
112 | return istr; |
113 | } |
114 | |
115 | ///////////////////////// char and wchar_t streamable classes /////////////////////////////////////////// |
116 | |
117 | |
118 | struct bistreamable_easy { enum ENU {value = 8}; }; |
119 | std::ostream& operator << (std::ostream& ostr, const bistreamable_easy&) { |
120 | return ostr << bistreamable_easy::value; |
121 | } |
122 | std::istream& operator >> (std::istream& istr, const bistreamable_easy&) { |
123 | int i; istr >> i; BOOST_TEST_EQ(i, bistreamable_easy::value); |
124 | return istr; |
125 | } |
126 | |
127 | std::wostream& operator << (std::wostream& ostr, const bistreamable_easy&) { |
128 | return ostr << bistreamable_easy::value + 100; |
129 | } |
130 | std::wistream& operator >> (std::wistream& istr, const bistreamable_easy&) { |
131 | int i; istr >> i; BOOST_TEST_EQ(i, bistreamable_easy::value + 100); |
132 | return istr; |
133 | } |
134 | |
135 | struct bistreamable_medium { enum ENU {value = 9}; }; |
136 | template <class CharT> |
137 | std::basic_ostream<CharT>& operator << (std::basic_ostream<CharT>& ostr, const bistreamable_medium&) { |
138 | return ostr << bistreamable_medium::value + (sizeof(CharT) == 1 ? 0 : 100); |
139 | } |
140 | template <class CharT> |
141 | std::basic_istream<CharT>& operator >> (std::basic_istream<CharT>& istr, const bistreamable_medium&) { |
142 | int i; istr >> i; BOOST_TEST_EQ(i, bistreamable_medium::value + (sizeof(CharT) == 1 ? 0 : 100)); |
143 | return istr; |
144 | } |
145 | |
146 | struct bistreamable_hard { enum ENU {value = 10}; }; |
147 | template <class CharT, class TraitsT> |
148 | std::basic_ostream<CharT, TraitsT>& operator << (std::basic_ostream<CharT, TraitsT>& ostr, const bistreamable_hard&) { |
149 | return ostr << bistreamable_hard::value + (sizeof(CharT) == 1 ? 0 : 100); |
150 | } |
151 | template <class CharT, class TraitsT> |
152 | std::basic_istream<CharT, TraitsT>& operator >> (std::basic_istream<CharT, TraitsT>& istr, const bistreamable_hard&) { |
153 | int i; istr >> i; BOOST_TEST_EQ(i, bistreamable_hard::value + (sizeof(CharT) == 1 ? 0 : 100)); |
154 | return istr; |
155 | } |
156 | |
157 | struct bistreamable_hard2 { enum ENU {value = 11}; }; |
158 | template <class TraitsT> |
159 | std::basic_ostream<char, TraitsT>& operator << (std::basic_ostream<char, TraitsT>& ostr, const bistreamable_hard2&) { |
160 | return ostr << bistreamable_hard2::value; |
161 | } |
162 | template <class TraitsT> |
163 | std::basic_istream<char, TraitsT>& operator >> (std::basic_istream<char, TraitsT>& istr, const bistreamable_hard2&) { |
164 | int i; istr >> i; BOOST_TEST_EQ(i, bistreamable_hard2::value); |
165 | return istr; |
166 | } |
167 | |
168 | template <class TraitsT> |
169 | std::basic_ostream<wchar_t, TraitsT>& operator << (std::basic_ostream<wchar_t, TraitsT>& ostr, const bistreamable_hard2&) { |
170 | return ostr << bistreamable_hard2::value + 100; |
171 | } |
172 | template <class TraitsT> |
173 | std::basic_istream<wchar_t, TraitsT>& operator >> (std::basic_istream<wchar_t, TraitsT>& istr, const bistreamable_hard2&) { |
174 | int i; istr >> i; BOOST_TEST_EQ(i, bistreamable_hard2::value + 100); |
175 | return istr; |
176 | } |
177 | |
178 | template <class T> |
179 | static void test_ostr_impl() { |
180 | T streamable; |
181 | BOOST_TEST_EQ(T::value, boost::lexical_cast<int>(streamable)); |
182 | BOOST_TEST_EQ(boost::lexical_cast<std::string>(T::value), boost::lexical_cast<std::string>(streamable)); |
183 | } |
184 | |
185 | template <class T> |
186 | static void test_wostr_impl() { |
187 | T streamable; |
188 | BOOST_TEST_EQ(T::value, boost::lexical_cast<int>(streamable)); |
189 | // BOOST_TEST_EQ(boost::lexical_cast<std::string>(T::value), boost::lexical_cast<std::string>(streamable)); // Shall not compile??? |
190 | BOOST_TEST(boost::lexical_cast<std::wstring>(T::value) == boost::lexical_cast<std::wstring>(streamable)); |
191 | } |
192 | |
193 | template <class T> |
194 | static void test_bistr_impl() { |
195 | T streamable; |
196 | |
197 | BOOST_TEST_EQ(T::value, boost::lexical_cast<int>(streamable)); |
198 | BOOST_TEST_EQ(boost::lexical_cast<std::string>(T::value), boost::lexical_cast<std::string>(streamable)); |
199 | |
200 | BOOST_TEST(boost::lexical_cast<std::wstring>(T::value + 100) == boost::lexical_cast<std::wstring>(streamable)); |
201 | } |
202 | |
203 | void test_ostream_character_detection() { |
204 | test_ostr_impl<streamable_easy>(); |
205 | test_ostr_impl<streamable_medium>(); |
206 | test_ostr_impl<streamable_hard>(); |
207 | test_ostr_impl<streamable_hard2>(); |
208 | |
209 | test_wostr_impl<wstreamable_easy>(); |
210 | test_wostr_impl<wstreamable_medium>(); |
211 | test_wostr_impl<wstreamable_hard>(); |
212 | test_wostr_impl<wstreamable_hard2>(); |
213 | |
214 | test_bistr_impl<bistreamable_easy>(); |
215 | test_bistr_impl<bistreamable_medium>(); |
216 | test_bistr_impl<bistreamable_hard>(); |
217 | test_bistr_impl<bistreamable_hard2>(); |
218 | } |
219 | |
220 | |
221 | template <class T> |
222 | static void test_istr_impl() { |
223 | boost::lexical_cast<T>(T::value); |
224 | boost::lexical_cast<T>(boost::lexical_cast<std::string>(T::value)); |
225 | } |
226 | |
227 | template <class T> |
228 | static void test_wistr_impl() { |
229 | boost::lexical_cast<T>(T::value); |
230 | //boost::lexical_cast<T>(boost::lexical_cast<std::string>(T::value)); // Shall not compile??? |
231 | boost::lexical_cast<T>(boost::lexical_cast<std::wstring>(T::value)); |
232 | } |
233 | |
234 | template <class T> |
235 | static void test_bistr_instr_impl() { |
236 | boost::lexical_cast<T>(T::value); |
237 | boost::lexical_cast<T>(boost::lexical_cast<std::string>(T::value)); |
238 | boost::lexical_cast<T>(boost::lexical_cast<std::wstring>(T::value + 100)); |
239 | } |
240 | |
241 | void test_istream_character_detection() { |
242 | test_istr_impl<streamable_easy>(); |
243 | test_istr_impl<streamable_medium>(); |
244 | test_istr_impl<streamable_hard>(); |
245 | test_istr_impl<streamable_hard2>(); |
246 | |
247 | test_wistr_impl<wstreamable_easy>(); |
248 | test_wistr_impl<wstreamable_medium>(); |
249 | test_wistr_impl<wstreamable_hard>(); |
250 | test_wistr_impl<wstreamable_hard2>(); |
251 | |
252 | test_bistr_instr_impl<bistreamable_easy>(); |
253 | test_bistr_instr_impl<bistreamable_medium>(); |
254 | test_bistr_instr_impl<bistreamable_hard>(); |
255 | test_bistr_instr_impl<bistreamable_hard2>(); |
256 | } |
257 | |
258 | struct wistreamble_ostreamable { enum ENU {value = 200}; }; |
259 | std::ostream& operator << (std::ostream& ostr, const wistreamble_ostreamable&) { |
260 | return ostr << wistreamble_ostreamable::value; |
261 | } |
262 | std::wistream& operator >> (std::wistream& istr, const wistreamble_ostreamable&) { |
263 | int i = 100; |
264 | istr >> i; |
265 | BOOST_TEST_EQ(i, wistreamble_ostreamable::value); |
266 | return istr; |
267 | } |
268 | |
269 | struct istreamble_wostreamable { enum ENU {value = 201}; }; |
270 | std::wostream& operator << (std::wostream& ostr, const istreamble_wostreamable&) { |
271 | return ostr << istreamble_wostreamable::value; |
272 | } |
273 | std::istream& operator >> (std::istream& istr, const istreamble_wostreamable&) { |
274 | int i; istr >> i; BOOST_TEST_EQ(i, istreamble_wostreamable::value); |
275 | return istr; |
276 | } |
277 | |
278 | void test_mixed_stream_character_detection() { |
279 | //boost::lexical_cast<std::wstring>(std::string("qwe")); // TODO: ALLOW IT AS EXTENSION! |
280 | |
281 | BOOST_TEST_EQ(boost::lexical_cast<int>(wistreamble_ostreamable::value), wistreamble_ostreamable::value); |
282 | boost::lexical_cast<wistreamble_ostreamable>(arg: wistreamble_ostreamable::value); |
283 | BOOST_TEST_EQ(boost::lexical_cast<int>(wistreamble_ostreamable()), wistreamble_ostreamable::value); |
284 | |
285 | boost::lexical_cast<istreamble_wostreamable>(arg: istreamble_wostreamable::value); |
286 | BOOST_TEST_EQ(boost::lexical_cast<int>(istreamble_wostreamable()), istreamble_wostreamable::value); |
287 | } |
288 | |
289 | |
290 | int main() |
291 | { |
292 | test_ostream_character_detection(); |
293 | test_istream_character_detection(); |
294 | test_mixed_stream_character_detection(); |
295 | |
296 | return boost::report_errors(); |
297 | } |
298 | |