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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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