87 lines
2.6 KiB
C++
87 lines
2.6 KiB
C++
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// Copyright (C) 2008-2018 Lorenzo Caminiti
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// Distributed under the Boost Software License, Version 1.0 (see accompanying
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// file LICENSE_1_0.txt or a copy at http://www.boost.org/LICENSE_1_0.txt).
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// See: http://www.boost.org/doc/libs/release/libs/contract/doc/html/index.html
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// Test STL equal_to with call_if.
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// C++17 warning from Boost.Bind.
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#define _SILENCE_CXX17_ADAPTOR_TYPEDEFS_DEPRECATION_WARNING
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#include "../detail/oteststream.hpp"
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#include <boost/contract/call_if.hpp>
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#include <boost/bind.hpp>
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#include <boost/type_traits/has_equal_to.hpp>
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#include <boost/detail/lightweight_test.hpp>
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#include <functional>
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#include <sstream>
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#include <ios>
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boost::contract::test::detail::oteststream out;
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template<typename T>
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struct void_equal_to {
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typedef void result_type; // Test void result type.
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void operator()(T const& left, T const& right) const {
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out << (left == right) << std::endl;
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}
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};
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struct x {}; // Doest not have operator==.
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int main() {
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std::ostringstream ok;
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ok << std::boolalpha;
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out << std::boolalpha;
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x x1, x2;;
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out.str("");
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out << // Test on true condition with non-void result type.
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boost::contract::call_if<boost::has_equal_to<int> >(
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boost::bind(std::equal_to<int>(), 123, 123) // True.
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).else_(
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// Compiler-error... but not called.
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boost::bind(std::equal_to<x>(), x1, x2)
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)
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<< std::endl;
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ok.str(""); ok << true << std::endl;
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BOOST_TEST(out.eq(ok.str()));
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out.str("");
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out << // Test on false condition with non-void result type.
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boost::contract::call_if<boost::has_equal_to<x> >(
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// Compiler-error... but not called.
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boost::bind(std::equal_to<x>(), x1, x2)
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).else_([] { return true; })
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<< std::endl;
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ok.str(""); ok << true << std::endl;
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BOOST_TEST(out.eq(ok.str()));
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out.str("");
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// Test on true condition void result type.
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boost::contract::call_if<boost::has_equal_to<int> >(
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boost::bind(void_equal_to<int>(), 123, 456) // False.
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).else_(
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// Compiler-error... but not called.
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boost::bind(void_equal_to<x>(), x1, x1)
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);
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ok.str(""); ok << false << std::endl;
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BOOST_TEST(out.eq(ok.str()));
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out.str("");
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// Test on false condition with void result type.
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boost::contract::call_if<boost::has_equal_to<x> >(
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// Compiler-error... but not called.
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boost::bind(void_equal_to<x>(), x1, x1)
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).else_(
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boost::bind(void_equal_to<int>(), 123, 456) // False.
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);
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ok.str(""); ok << false << std::endl;
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BOOST_TEST(out.eq(ok.str()));
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return boost::report_errors();
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}
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