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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 false 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
<x
> >(
38 boost::bind(eq(), x1
, x2
) // Compiler-error... but not called.
41 BOOST_TEST(out
.eq(ok
.str()));
45 boost::contract::call_if_c
<boost::has_equal_to
<x
>::value
>(
46 boost::bind(eq(), x1
, x2
) // Compiler-error...but not called.
48 [] { out
<< true << std::endl
; } // Test else.
50 ok
.str(""); ok
<< true << std::endl
;
51 BOOST_TEST(out
.eq(ok
.str()));
53 return boost::report_errors();