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/*=============================================================================
Copyright (c) 2001-2011 Joel de Guzman
Copyright (c) 2007 Dan Marsden
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 <boost/detail/lightweight_test.hpp>
#include <boost/fusion/container/vector/vector.hpp>
#include <boost/fusion/adapted/mpl.hpp>
#include <boost/fusion/sequence/io/out.hpp>
#include <boost/fusion/container/generation/make_vector.hpp>
#include <boost/fusion/sequence/comparison/equal_to.hpp>
#include <boost/fusion/algorithm/transformation/transform.hpp>
#include <boost/type_traits/is_class.hpp>
#include <boost/type_traits/is_same.hpp>
#include <boost/mpl/range_c.hpp>
#include <boost/type_traits/is_reference.hpp>
struct square
{
template<typename Sig>
struct result;
template <typename T>
struct result<square(T)>
{
typedef int type;
};
template <typename T>
int operator()(T x) const
{
return x * x;
}
};
struct add
{
template<typename Sig>
struct result;
template <typename A, typename B>
struct result<add(A, B)>
{
typedef int type;
};
template <typename A, typename B>
int operator()(A a, B b) const
{
return a + b;
}
};
struct unary_lvalue_transform
{
template<typename Sig>
struct result;
template<typename T>
struct result<unary_lvalue_transform(T&)>
{
typedef T* type;
};
template<typename T>
T* operator()(T& t) const
{
return &t;
}
};
int twice(int v)
{
return v*2;
}
struct binary_lvalue_transform
{
template<typename Sig>
struct result;
template<typename T0, typename T1>
struct result<binary_lvalue_transform(T0&,T1&)>
{
typedef T0* type;
};
template<typename T0, typename T1>
T0* operator()(T0& t0, T1&) const
{
return &t0;
}
};
int
main()
{
using namespace boost::fusion;
using boost::mpl::range_c;
std::cout << tuple_open('[');
std::cout << tuple_close(']');
std::cout << tuple_delimiter(", ");
/// Testing the transform
{
typedef range_c<int, 5, 9> sequence_type;
sequence_type sequence;
std::cout << boost::fusion::transform(sequence, square()) << std::endl;
BOOST_TEST((boost::fusion::transform(sequence, square()) == make_vector(25, 36, 49, 64)));
}
{
typedef range_c<int, 5, 9> mpl_list1;
std::cout << boost::fusion::transform(mpl_list1(), square()) << std::endl;
BOOST_TEST((boost::fusion::transform(mpl_list1(), square()) == make_vector(25, 36, 49, 64)));
}
{
vector<int, int, int> tup(1, 2, 3);
std::cout << boost::fusion::transform(tup, square()) << std::endl;
BOOST_TEST((boost::fusion::transform(tup, square()) == make_vector(1, 4, 9)));
}
{
vector<int, int, int> tup1(1, 2, 3);
vector<int, int, int> tup2(4, 5, 6);
std::cout << boost::fusion::transform(tup1, tup2, add()) << std::endl;
BOOST_TEST((boost::fusion::transform(tup1, tup2, add()) == make_vector(5, 7, 9)));
}
{
// Unary transform that requires lvalues, just check compilation
vector<int, int, int> tup1(1, 2, 3);
BOOST_TEST(at_c<0>(boost::fusion::transform(tup1, unary_lvalue_transform())) == &at_c<0>(tup1));
BOOST_TEST(*begin(boost::fusion::transform(tup1, unary_lvalue_transform())) == &at_c<0>(tup1));
}
{
vector<int, int, int> tup1(1, 2, 3);
vector<int, int, int> tup2(4, 5, 6);
BOOST_TEST(at_c<0>(boost::fusion::transform(tup1, tup2, binary_lvalue_transform())) == &at_c<0>(tup1));
BOOST_TEST(*begin(boost::fusion::transform(tup1, tup2, binary_lvalue_transform())) == &at_c<0>(tup1));
}
{
vector<int, int, int> tup1(1, 2, 3);
BOOST_TEST(boost::fusion::transform(tup1, twice) == make_vector(2,4,6));
}
return boost::report_errors();
}
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