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