2 // Copyright (C) 2008-2018 Lorenzo Caminiti
3 // Distributed under the Boost Software License, Version 1.0 (see accompanying
4 // file LICENSE_1_0.txt or a copy at http://www.boost.org/LICENSE_1_0.txt).
5 // See: http://www.boost.org/doc/libs/release/libs/contract/doc/html/index.html
7 // Test call_if with true condition and void result type.
9 #include "../detail/oteststream.hpp"
10 #include <boost/contract/call_if.hpp>
11 #include <boost/bind.hpp>
12 #include <boost/type_traits/has_equal_to.hpp>
13 #include <boost/detail/lightweight_test.hpp>
17 boost::contract::test::detail::oteststream out;
20 typedef void result_type; // Test void result type.
22 template<typename L, typename R>
23 result_type operator()(L left, R right) const {
24 out << (left == right) << std::endl; // Requires operator==.
28 struct x {}; // Doest not have operator==.
31 std::ostringstream ok;
33 out << std::boolalpha;
37 boost::contract::call_if<boost::has_equal_to<int> >(
38 boost::bind(eq(), 123, 456) // False.
39 ); // Test no else (not called).
40 ok.str(""); ok << false << std::endl;
41 BOOST_TEST(out.eq(ok.str()));
44 boost::contract::call_if<boost::has_equal_to<int> >(
45 boost::bind(eq(), 123, 123) // True.
48 ); // Test else (not called).
49 ok.str(""); ok << true << std::endl;
50 BOOST_TEST(out.eq(ok.str()));
54 boost::contract::call_if_c<boost::has_equal_to<int>::value>(
55 boost::bind(eq(), 123, 123) // True.
56 ).else_( // Test else (not called).
57 boost::bind(eq(), x1, x2) // Compiler-error... but not called.
59 ok.str(""); ok << true << std::endl;
60 BOOST_TEST(out.eq(ok.str()));
62 return boost::report_errors();