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