127 lines
3.5 KiB
C++
127 lines
3.5 KiB
C++
/*=============================================================================
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Copyright (c) 2001-2007 Joel de Guzman
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Copyright (c) 2015 John Fletcher
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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 copy at http://www.boost.org/LICENSE_1_0.txt)
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==============================================================================*/
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#include <iostream>
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#include <cmath>
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#include <algorithm>
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#include <vector>
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#include <boost/phoenix/core/limits.hpp>
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#include <boost/detail/lightweight_test.hpp>
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#include <boost/fusion/tuple.hpp>
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#include <boost/phoenix/core.hpp>
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#include <boost/phoenix/operator.hpp>
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#include <boost/phoenix/function.hpp>
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#include <boost/phoenix/fusion.hpp>
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#include <boost/phoenix/scope.hpp>
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#include <typeinfo>
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namespace fusion = boost::fusion;
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namespace mpl = boost::mpl;
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int
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main()
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{
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using boost::phoenix::let;
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using boost::phoenix::val;
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using boost::phoenix::arg_names::_1;
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using boost::phoenix::local_names::_a;
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using boost::phoenix::local_names::_b;
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/*
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{
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// show that we can return a local from an outer scope
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int y = 0;
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int x = (let(_a = 1)[let(_b = _1)[ _a ]])(y);
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BOOST_TEST(x == 1);
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}
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{
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// show that we can return a local from an inner scope
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int y = 1;
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int x = (let(_a = 0)[let(_b = _1)[ _b ]])(y);
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BOOST_TEST(x == 1);
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}
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{
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// show that we can return a local from an outer scope
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//int y = 0;
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int x = (let(_a = 1)[let(_b = _a)[ _a ]])();
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BOOST_TEST(x == 1);
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}
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{
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// show that we can return a local from an inner scope
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//int y = 0;
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int x = (let(_a = 1)[let(_b = _a)[ _b ]])();
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BOOST_TEST(x == 1);
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}
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{
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// show that we can return a local from an outer scope
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int y = 1;
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int x = (let(_a = _1)[let(_b = _a)[ _a ]])(y);
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BOOST_TEST(x == 1);
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}
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{
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// show that we can return a local from an inner scope
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int y = 1;
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int x = (let(_a = _1)[let(_b = _a)[ _b ]])(y);
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BOOST_TEST(x == 1);
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}
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*/
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//++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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// Be very careful. Some of these cases give a silly answer
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// with clang 3.4 with C++03 and work for C++11.
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// gcc 4.8.2 seems O.K. both ways. Oh dear.
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//++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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{
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int y = 0;
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int x = (let(_a = 1, _b = 2)[let(_b = _a)[ _a ]])(y);
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//std::cout << x << " P1A "; //clang - empty memory
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BOOST_TEST(x == 1);
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}
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{
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int y = 0;
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int x = (let(_a = 1, _b = 2)[let(_b = _a)[ _b ]])(y);
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//std::cout << x << " P1B "; //clang - 42 value- one step better
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BOOST_TEST(x == 1);
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}
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{
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int y = 0;
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int x = (let(_a = val(1), _b = val(2))[let(_b = _a)[ _a ]])(y);
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//std::cout << x << " P2A "; //clang - 42 value - one step better
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BOOST_TEST(x == 1);
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}
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/* {
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int y = 0;
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int x = (let(_a = val(1), _b = val(2))[let(_b = _a)[ _b ]])(y);
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//std::cout << x << " P2B "; //clang - 42 value - one step better
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BOOST_TEST(x == 1);
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}
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{
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int y = 1;
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int x = (let(_a = _1, _b = val(2))[let(_b = _a)[ _a ]])(y);
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//std::cout << x << " P3 "; //clang - OK - one step better still
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BOOST_TEST(x == 1);
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}
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{
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int y = 0;
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int x = (let(_a = 1, _b = 2)[let(_b = _1)[ _a ]])(y);
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// std::cout << x << " Q "; // clang 4201472
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BOOST_TEST(x == 1);
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}
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*/
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return boost::report_errors();
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}
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