57 lines
1.7 KiB
C++
57 lines
1.7 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 call_if equality check with C++14 generic lambdas.
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#include "../detail/oteststream.hpp"
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#include <boost/contract/call_if.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> // std::bind for generic lambdas.
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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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struct x {}; // Does 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 <<
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boost::contract::call_if<boost::has_equal_to<int> >(
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std::bind([] (auto a, auto b) { return a == b; }, 123, 456)
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).else_([] { return true; })
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<< std::endl;
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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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out <<
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boost::contract::call_if<boost::has_equal_to<x> >(
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std::bind([] (auto a, auto b) { return a == b; }, 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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out << // Test explicit result, cannot deduce from lambda missing `-> bool`.
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boost::contract::call_if<boost::has_equal_to<x> >(
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std::bind([] (auto a, auto b) { return a == b; }, 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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return boost::report_errors();
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}
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