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- // Copyright (C) 2008-2018 Lorenzo Caminiti
- // Distributed under the Boost Software License, Version 1.0 (see accompanying
- // file LICENSE_1_0.txt or a copy at http://www.boost.org/LICENSE_1_0.txt).
- // See: http://www.boost.org/doc/libs/release/libs/contract/doc/html/index.html
- // Test call_if equality check with C++14 generic lambdas.
- #include "../detail/oteststream.hpp"
- #include <boost/contract/call_if.hpp>
- #include <boost/type_traits/has_equal_to.hpp>
- #include <boost/detail/lightweight_test.hpp>
- #include <functional> // std::bind for generic lambdas.
- #include <sstream>
- #include <ios>
- boost::contract::test::detail::oteststream out;
- struct x {}; // Does not have operator==.
- int main() {
- std::ostringstream ok;
- ok << std::boolalpha;
- out << std::boolalpha;
- x x1, x2;
-
- out.str("");
- out <<
- boost::contract::call_if<boost::has_equal_to<int> >(
- std::bind([] (auto a, auto b) { return a == b; }, 123, 456)
- ).else_([] { return true; })
- << std::endl;
- ok.str(""); ok << false << std::endl;
- BOOST_TEST(out.eq(ok.str()));
- out.str("");
- out <<
- boost::contract::call_if<boost::has_equal_to<x> >(
- std::bind([] (auto a, auto b) { return a == b; }, x1, x2)
- ).else_([] { return true; })
- << std::endl;
- ok.str(""); ok << true << std::endl;
- BOOST_TEST(out.eq(ok.str()));
-
- out.str("");
- out << // Test explicit result, cannot deduce from lambda missing `-> bool`.
- boost::contract::call_if<boost::has_equal_to<x> >(
- std::bind([] (auto a, auto b) { return a == b; }, x1, x2)
- ).else_([] { return true; })
- << std::endl;
- ok.str(""); ok << true << std::endl;
- BOOST_TEST(out.eq(ok.str()));
- return boost::report_errors();
- }
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