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1 | // Copyright (C) 2003, Fernando Luis Cacciola Carballal. |
2 | // Copyright (C) 2014 Andrzej Krzemienski. | |
3 | // | |
4 | // Use, modification, and distribution is subject to the Boost Software | |
5 | // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at | |
6 | // http://www.boost.org/LICENSE_1_0.txt) | |
7 | // | |
8 | // See http://www.boost.org/lib/optional for documentation. | |
9 | // | |
10 | // You are welcome to contact the author at: | |
11 | // fernando_cacciola@hotmail.com | |
12 | ||
13 | #include <sstream> | |
14 | #include "boost/optional/optional.hpp" | |
15 | #include "boost/optional/optional_io.hpp" | |
16 | ||
17 | #ifdef __BORLANDC__ | |
18 | #pragma hdrstop | |
19 | #endif | |
20 | ||
21 | #include "boost/core/lightweight_test.hpp" | |
22 | ||
23 | using boost::optional; | |
7c673cae FG |
24 | |
25 | template<class Opt> | |
26 | void test2( Opt o, Opt buff ) | |
27 | { | |
28 | std::stringstream s ; | |
29 | ||
30 | const int markv = 123 ; | |
31 | int mark = 0 ; | |
32 | ||
33 | s << o << " " << markv ; | |
34 | s >> buff >> mark ; | |
35 | ||
36 | BOOST_TEST( buff == o ) ; | |
37 | BOOST_TEST( mark == markv ) ; | |
38 | } | |
39 | ||
40 | ||
41 | template<class T> | |
42 | void test( T v, T w ) | |
43 | { | |
b32b8144 FG |
44 | test2( boost::make_optional(v), optional<T> ()); |
45 | test2( boost::make_optional(v), boost::make_optional(w)); | |
7c673cae | 46 | test2( optional<T> () , optional<T> ()); |
b32b8144 | 47 | test2( optional<T> () , boost::make_optional(w)); |
7c673cae FG |
48 | } |
49 | ||
50 | ||
51 | template <class T> | |
52 | void subtest_tag_none_reversibility_with_optional(optional<T> ov) | |
53 | { | |
54 | std::stringstream s; | |
55 | s << boost::none; | |
56 | s >> ov; | |
57 | BOOST_TEST(!ov); | |
58 | } | |
59 | ||
60 | template <class T> | |
61 | void subtest_tag_none_equivalence_with_optional() | |
62 | { | |
63 | std::stringstream s, r; | |
64 | optional<T> ov; | |
65 | s << boost::none; | |
66 | r << ov; | |
67 | BOOST_TEST_EQ(s.str(), r.str()); | |
68 | } | |
69 | ||
70 | template <class T> | |
71 | void test_tag_none(T v) | |
72 | { | |
73 | subtest_tag_none_reversibility_with_optional(optional<T>(v)); | |
74 | subtest_tag_none_reversibility_with_optional(optional<T>()); | |
75 | subtest_tag_none_equivalence_with_optional<T>(); | |
76 | } | |
77 | ||
78 | ||
79 | int main() | |
80 | { | |
81 | test(1,2); | |
82 | test(std::string("hello"), std::string("buffer")); | |
83 | test_tag_none(10); | |
84 | test_tag_none(std::string("text")); | |
85 | ||
86 | return boost::report_errors(); | |
87 | } |