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1 | // Copyright David Abrahams, Daniel Wallin 2003. |
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) | |
7c673cae | 5 | |
92f5a8d4 TL |
6 | #include <boost/parameter/config.hpp> |
7 | ||
8 | #if (BOOST_PARAMETER_MAX_ARITY < 2) | |
9 | #error Define BOOST_PARAMETER_MAX_ARITY as 2 or greater. | |
10 | #endif | |
11 | #if !defined(BOOST_PARAMETER_HAS_PERFECT_FORWARDING) | |
12 | #if (BOOST_PARAMETER_EXPONENTIAL_OVERLOAD_THRESHOLD_ARITY < 3) | |
13 | #error Define BOOST_PARAMETER_EXPONENTIAL_OVERLOAD_THRESHOLD_ARITY \ | |
14 | as 3 or greater. | |
15 | #endif | |
16 | #endif | |
17 | ||
18 | #include <boost/parameter/name.hpp> | |
19 | ||
20 | namespace test { | |
21 | ||
22 | BOOST_PARAMETER_NAME((name, keywords) in(name)) | |
23 | BOOST_PARAMETER_NAME((value, keywords) in(value)) | |
24 | } // namespace test | |
25 | ||
26 | #if defined(BOOST_PARAMETER_CAN_USE_MP11) | |
27 | #include <type_traits> | |
28 | #else | |
29 | #include <boost/mpl/bool.hpp> | |
30 | #include <boost/mpl/if.hpp> | |
7c673cae | 31 | #include <boost/type_traits/is_convertible.hpp> |
92f5a8d4 | 32 | #endif |
7c673cae | 33 | |
92f5a8d4 | 34 | namespace test { |
7c673cae | 35 | |
92f5a8d4 TL |
36 | template <typename To> |
37 | struct f_predicate | |
38 | { | |
39 | template <typename From, typename Args> | |
40 | #if defined(BOOST_PARAMETER_CAN_USE_MP11) | |
41 | using fn = std::is_convertible<From,To>; | |
42 | #else | |
43 | struct apply | |
44 | : boost::mpl::if_< | |
45 | boost::is_convertible<From,To> | |
46 | , boost::mpl::true_ | |
47 | , boost::mpl::false_ | |
48 | > | |
49 | { | |
50 | }; | |
51 | #endif | |
52 | }; | |
53 | } // namespace test | |
54 | ||
55 | #include <boost/parameter/parameters.hpp> | |
56 | #include <boost/parameter/optional.hpp> | |
57 | #include <string> | |
58 | ||
59 | namespace test { | |
60 | ||
61 | struct f_parameters | |
62 | : boost::parameter::parameters< | |
63 | boost::parameter::optional< | |
64 | test::keywords::name | |
65 | , test::f_predicate<std::string> | |
66 | > | |
67 | , boost::parameter::optional< | |
68 | test::keywords::value | |
69 | , test::f_predicate<float> | |
70 | > | |
71 | > | |
72 | { | |
73 | }; | |
74 | } // namespace test | |
75 | ||
76 | #include <boost/core/lightweight_test.hpp> | |
77 | ||
78 | namespace test { | |
79 | ||
80 | // The use of assert_equal_string is just a nasty workaround for a | |
81 | // vc++ 6 ICE. | |
82 | void assert_equal_string(std::string x, std::string y) | |
83 | { | |
7c673cae | 84 | BOOST_TEST(x == y); |
92f5a8d4 TL |
85 | } |
86 | ||
87 | template <typename P> | |
88 | void f_impl(P const& p) | |
89 | { | |
90 | float v = p[test::value | 3.f]; | |
91 | BOOST_TEST_EQ(v, 3.f); | |
92 | test::assert_equal_string(p[test::name | "bar"], "foo"); | |
93 | } | |
94 | ||
95 | void f() | |
96 | { | |
97 | test::f_impl(f_parameters()()); | |
98 | } | |
7c673cae FG |
99 | } // namespace test |
100 | ||
92f5a8d4 TL |
101 | #include <boost/parameter/match.hpp> |
102 | ||
103 | namespace test { | |
104 | ||
105 | template <typename A0> | |
106 | void | |
107 | f( | |
108 | A0 const& a0 | |
109 | , BOOST_PARAMETER_MATCH(f_parameters, (A0), args) | |
110 | ) | |
111 | { | |
112 | test::f_impl(args(a0)); | |
113 | } | |
114 | ||
115 | template <typename A0, typename A1> | |
116 | void | |
117 | f( | |
118 | A0 const& a0 | |
119 | , A1 const& a1 | |
120 | , BOOST_PARAMETER_MATCH(f_parameters, (A0)(A1), args) | |
121 | ) | |
122 | { | |
123 | test::f_impl(args(a0, a1)); | |
124 | } | |
125 | } // namespace test | |
126 | ||
127 | #if !defined(BOOST_NO_SFINAE) && \ | |
20effc67 | 128 | !BOOST_WORKAROUND(BOOST_BORLANDC, BOOST_TESTED_AT(0x592)) |
92f5a8d4 TL |
129 | #include <boost/core/enable_if.hpp> |
130 | ||
131 | #if !defined(BOOST_PARAMETER_CAN_USE_MP11) | |
132 | #include <boost/type_traits/is_same.hpp> | |
133 | #endif | |
134 | ||
135 | namespace test { | |
7c673cae | 136 | |
92f5a8d4 TL |
137 | // On compilers that actually support SFINAE, add another overload that is |
138 | // an equally good match and can only be in the overload set when the | |
139 | // others are not. This tests that the SFINAE is actually working. On | |
140 | // all other compilers we're just checking that everything about | |
141 | // SFINAE-enabled code will work, except of course the SFINAE. | |
142 | template <typename A0, typename A1> | |
143 | typename boost::enable_if< | |
144 | #if defined(BOOST_PARAMETER_CAN_USE_MP11) | |
145 | std::is_same<int,A0> | |
146 | #else | |
147 | typename boost::mpl::if_< | |
148 | boost::is_same<int,A0> | |
149 | , boost::mpl::true_ | |
150 | , boost::mpl::false_ | |
151 | >::type | |
152 | #endif | |
153 | , int | |
154 | >::type | |
155 | f(A0 const& a0, A1 const& a1) | |
156 | { | |
157 | return 0; | |
158 | } | |
159 | } // namespace test | |
160 | ||
161 | #endif // SFINAE enabled, no Borland workarounds needed. | |
7c673cae | 162 | |
92f5a8d4 TL |
163 | int main() |
164 | { | |
165 | test::f("foo"); | |
166 | test::f("foo", 3.f); | |
167 | test::f(test::value = 3.f, test::name = "foo"); | |
168 | #if !defined(BOOST_NO_SFINAE) && \ | |
20effc67 | 169 | !BOOST_WORKAROUND(BOOST_BORLANDC, BOOST_TESTED_AT(0x592)) |
92f5a8d4 | 170 | BOOST_TEST_EQ(0, test::f(3, 4)); |
7c673cae FG |
171 | #endif |
172 | return boost::report_errors(); | |
173 | } | |
174 |