| 1 | // ret_test.cpp - The Boost Lambda Library ----------------------- |
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| 2 | // |
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| 3 | // Copyright (C) 2009 Steven Watanabe |
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| 4 | // |
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| 5 | // Distributed under the Boost Software License, Version 1.0. (See |
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| 6 | // accompanying file LICENSE_1_0.txt or copy at |
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| 7 | // http://www.boost.org/LICENSE_1_0.txt) |
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| 8 | // |
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| 9 | // For more information, see www.boost.org |
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| 10 | |
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| 11 | #include <boost/core/lightweight_test.hpp> |
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| 12 | |
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| 13 | #include <boost/lambda/lambda.hpp> |
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| 14 | |
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| 15 | #include <boost/mpl/assert.hpp> |
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| 16 | #include <boost/type_traits/is_same.hpp> |
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| 17 | |
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| 18 | template<class R, class F> |
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| 19 | void test_ret(R r, F f) { |
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| 20 | typename F::result_type x = f(); |
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| 21 | BOOST_MPL_ASSERT((boost::is_same<R, typename F::result_type>)); |
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| 22 | BOOST_TEST(x == r); |
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| 23 | } |
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| 24 | |
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| 25 | template<class R, class F, class T1> |
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| 26 | void test_ret(R r, F f, T1& t1) { |
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| 27 | typename F::result_type x = f(t1); |
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| 28 | BOOST_MPL_ASSERT((boost::is_same<R, typename F::result_type>)); |
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| 29 | BOOST_TEST(x == r); |
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| 30 | } |
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| 31 | |
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| 32 | class add_result { |
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| 33 | public: |
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| 34 | add_result(int i = 0) : value(i) {} |
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| 35 | friend bool operator==(const add_result& lhs, const add_result& rhs) { |
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| 36 | return(lhs.value == rhs.value); |
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| 37 | } |
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| 38 | private: |
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| 39 | int value; |
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| 40 | }; |
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| 41 | |
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| 42 | class addable {}; |
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| 43 | add_result operator+(addable, addable) { |
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| 44 | return add_result(7); |
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| 45 | } |
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| 46 | |
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| 47 | int main() |
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| 48 | { |
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| 49 | addable test; |
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| 50 | test_ret(r: add_result(7), f: boost::lambda::ret<add_result>(a1: boost::lambda::_1 + test), t1&: test); |
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| 51 | test_ret(r: 8.0, f: boost::lambda::ret<double>(a1: boost::lambda::constant(t: 7) + 1)); |
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| 52 | |
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| 53 | return boost::report_errors(); |
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| 54 | } |
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| 55 | |
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