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Library/boost/libs/lambda/test/ret_test.cpp
53 строки
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PatoFlamejanteTV
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19 дек 2024, 19:11
19 дек 2024, 19:11
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// ret_test.cpp - The Boost Lambda Library ----------------------- // // Copyright (C) 2009 Steven Watanabe // // Distributed under the Boost Software License, Version 1.0. (See // accompanying file LICENSE_1_0.txt or copy at // http://www.boost.org/LICENSE_1_0.txt) // // For more information, see www.boost.org #include <boost/test/minimal.hpp> #include <boost/lambda/lambda.hpp> #include <boost/mpl/assert.hpp> #include <boost/type_traits/is_same.hpp> template<class R, class F> void test_ret(R r, F f) { typename F::result_type x = f(); BOOST_MPL_ASSERT((boost::is_same<R, typename F::result_type>)); BOOST_CHECK(x == r); } template<class R, class F, class T1> void test_ret(R r, F f, T1& t1) { typename F::result_type x = f(t1); BOOST_MPL_ASSERT((boost::is_same<R, typename F::result_type>)); BOOST_CHECK(x == r); } class add_result { public: add_result(int i = 0) : value(i) {} friend bool operator==(const add_result& lhs, const add_result& rhs) { return(lhs.value == rhs.value); } private: int value; }; class addable {}; add_result operator+(addable, addable) { return add_result(7); } int test_main(int, char*[]) { addable test; test_ret(add_result(7), boost::lambda::ret<add_result>(boost::lambda::_1 + test), test); test_ret(8.0, boost::lambda::ret<double>(boost::lambda::constant(7) + 1)); return 0; }