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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 with true condition and void result type.
- #include "../detail/oteststream.hpp"
- #include <boost/contract/call_if.hpp>
- #include <boost/bind.hpp>
- #include <boost/type_traits/has_equal_to.hpp>
- #include <boost/detail/lightweight_test.hpp>
- #include <sstream>
- #include <ios>
- boost::contract::test::detail::oteststream out;
- struct eq {
- typedef void result_type; // Test void result type.
- template<typename L, typename R>
- result_type operator()(L left, R right) const {
- out << (left == right) << std::endl; // Requires operator==.
- }
- };
- struct x {}; // Doest not have operator==.
- int main() {
- std::ostringstream ok;
- ok << std::boolalpha;
- out << std::boolalpha;
- x x1, x2;;
-
- out.str("");
- boost::contract::call_if<boost::has_equal_to<int> >(
- boost::bind(eq(), 123, 456) // False.
- ); // Test no else (not called).
- ok.str(""); ok << false << std::endl;
- BOOST_TEST(out.eq(ok.str()));
- out.str("");
- boost::contract::call_if<boost::has_equal_to<int> >(
- boost::bind(eq(), 123, 123) // True.
- ).else_(
- [] { return false; }
- ); // Test else (not called).
- ok.str(""); ok << true << std::endl;
- BOOST_TEST(out.eq(ok.str()));
-
- out.str("");
- // Test "..._c".
- boost::contract::call_if_c<boost::has_equal_to<int>::value>(
- boost::bind(eq(), 123, 123) // True.
- ).else_( // Test else (not called).
- boost::bind(eq(), x1, x2) // Compiler-error... but not called.
- );
- ok.str(""); ok << true << std::endl;
- BOOST_TEST(out.eq(ok.str()));
- return boost::report_errors();
- }
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