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/*=============================================================================
Copyright (c) 2001-2007 Joel de Guzman
Copyright (c) 2015 John Fletcher
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)
==============================================================================*/
#include <iostream>
#include <cmath>
#include <algorithm>
#include <vector>
#include <boost/phoenix/core/limits.hpp>
#include <boost/detail/lightweight_test.hpp>
#include <boost/fusion/tuple.hpp>
#include <boost/phoenix/core.hpp>
#include <boost/phoenix/operator.hpp>
#include <boost/phoenix/function.hpp>
#include <boost/phoenix/fusion.hpp>
#include <boost/phoenix/scope.hpp>
#include <typeinfo>
namespace fusion = boost::fusion;
namespace mpl = boost::mpl;
int
main()
{
using boost::phoenix::let;
using boost::phoenix::val;
using boost::phoenix::arg_names::_1;
using boost::phoenix::arg_names::_2;
using boost::phoenix::local_names::_a;
using boost::phoenix::local_names::_b;
{
// show that we can return a local from an outer scope
int y = 0;
#if defined(BOOST_GCC_VERSION) && (BOOST_GCC_VERSION >= 50000) && __OPTIMIZE__
int x = (let(_a = _2)[let(_b = _1)[ _a ]])(y,1);
#else
int x = (let(_a = 1)[let(_b = _1)[ _a ]])(y);
#endif
BOOST_TEST(x == 1);
}
{
// show that we can return a local from an inner scope
int y = 1;
int x = (let(_a = 0)[let(_b = _1)[ _b ]])(y);
BOOST_TEST(x == 1);
}
{
// show that we can return a local from an outer scope
//int y = 0;
#if defined(BOOST_GCC_VERSION) && (BOOST_GCC_VERSION >= 50000) && __OPTIMIZE__
int x = (let(_a = 1)[let(_b = _a)[ _a ]])();
#else
int x = (let(_a = _1)[let(_b = _a)[ _a ]])(1);
#endif
BOOST_TEST(x == 1);
}
{
// show that we can return a local from an inner scope
//int y = 0;
#if defined(BOOST_GCC_VERSION) && (BOOST_GCC_VERSION >= 50000) && __OPTIMIZE__
int x = (let(_a = _1)[let(_b = _a)[ _b ]])(1);
#else
int x = (let(_a = 1)[let(_b = _a)[ _b ]])();
#endif
BOOST_TEST(x == 1);
}
{
// show that we can return a local from an outer scope
int y = 1;
int x = (let(_a = _1)[let(_b = _a)[ _a ]])(y);
BOOST_TEST(x == 1);
}
{
// show that we can return a local from an inner scope
int y = 1;
int x = (let(_a = _1)[let(_b = _a)[ _b ]])(y);
BOOST_TEST(x == 1);
}
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// Be very careful. Some of these cases give a silly answer
// with clang 3.4 with C++03 and work for C++11.
// gcc 4.8.2 seems O.K. both ways. Oh dear.
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++
/* {
int y = 0;
int x = (let(_a = 1, _b = 2)[let(_b = _a)[ _a ]])(y);
//std::cout << x << " P1A "; //clang - empty memory
BOOST_TEST(x == 1);
}
{
int y = 0;
int x = (let(_a = 1, _b = 2)[let(_b = _a)[ _b ]])(y);
//std::cout << x << " P1B "; //clang - 42 value- one step better
BOOST_TEST(x == 1);
}
{
int y = 0;
int x = (let(_a = val(1), _b = val(2))[let(_b = _a)[ _a ]])(y);
//std::cout << x << " P2A "; //clang - 42 value - one step better
BOOST_TEST(x == 1);
}
{
int y = 0;
int x = (let(_a = val(1), _b = val(2))[let(_b = _a)[ _b ]])(y);
//std::cout << x << " P2B "; //clang - 42 value - one step better
BOOST_TEST(x == 1);
}
{
int y = 1;
int x = (let(_a = _1, _b = val(2))[let(_b = _a)[ _a ]])(y);
//std::cout << x << " P3 "; //clang - OK - one step better still
BOOST_TEST(x == 1);
}
{
int y = 0;
int x = (let(_a = 1, _b = 2)[let(_b = _1)[ _a ]])(y);
// std::cout << x << " Q "; // clang 4201472
BOOST_TEST(x == 1);
}
*/
return boost::report_errors();
}
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