| // Boost.Range library |
| // |
| // Copyright Neil Groves 2009. Use, modification and |
| // distribution is subject to 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) |
| // |
| // |
| // For more information, see http://www.boost.org/libs/range/ |
| // |
| #include <boost/range/adaptor/filtered.hpp> |
| |
| #include <boost/test/test_tools.hpp> |
| #include <boost/test/unit_test.hpp> |
| |
| #include <boost/assign.hpp> |
| #include <boost/range/algorithm_ext.hpp> |
| |
| #include <algorithm> |
| #include <list> |
| #include <set> |
| #include <string> |
| #include <vector> |
| |
| namespace boost |
| { |
| namespace |
| { |
| struct always_false_pred |
| { |
| template< class T1 > |
| bool operator()(T1) const { return false; } |
| }; |
| |
| struct always_true_pred |
| { |
| template< class T1 > |
| bool operator()(T1) const { return true; } |
| }; |
| |
| struct is_even |
| { |
| template< class IntegerT > |
| bool operator()( IntegerT x ) const { return x % 2 == 0; } |
| }; |
| |
| struct is_odd |
| { |
| template< class IntegerT > |
| bool operator()( IntegerT x ) const { return x % 2 != 0; } |
| }; |
| |
| template< class Container, class Pred > |
| void filtered_test_impl( Container& c, Pred pred ) |
| { |
| using namespace boost::adaptors; |
| |
| typedef BOOST_DEDUCED_TYPENAME Container::value_type value_t; |
| |
| // This is my preferred syntax using the | operator. |
| std::vector< value_t > test_result1; |
| boost::push_back(test_result1, c | filtered(pred)); |
| |
| // This is an alternative syntax preferred by some. |
| std::vector< value_t > test_result2; |
| boost::push_back(test_result2, adaptors::filter(c, pred)); |
| |
| // Calculate the reference result. |
| std::vector< value_t > reference_result; |
| typedef BOOST_DEDUCED_TYPENAME Container::const_iterator iter_t; |
| for (iter_t it = c.begin(); it != c.end(); ++it) |
| { |
| if (pred(*it)) |
| reference_result.push_back(*it); |
| } |
| |
| BOOST_CHECK_EQUAL_COLLECTIONS( reference_result.begin(), |
| reference_result.end(), |
| test_result1.begin(), |
| test_result1.end() ); |
| |
| BOOST_CHECK_EQUAL_COLLECTIONS( reference_result.begin(), |
| reference_result.end(), |
| test_result2.begin(), |
| test_result2.end() ); |
| } |
| |
| template< class Container, class Pred > |
| void filtered_test_impl() |
| { |
| using namespace boost::assign; |
| |
| Container c; |
| |
| // test empty container |
| filtered_test_impl(c, Pred()); |
| |
| // test one element |
| c += 1; |
| filtered_test_impl(c, Pred()); |
| |
| // test many elements |
| c += 1,2,2,2,3,4,4,4,4,5,6,7,8,9,9; |
| filtered_test_impl(c, Pred()); |
| } |
| |
| template< class Container > |
| void filtered_test_all_predicates() |
| { |
| filtered_test_impl< Container, always_false_pred >(); |
| filtered_test_impl< Container, always_true_pred >(); |
| filtered_test_impl< Container, is_odd >(); |
| filtered_test_impl< Container, is_even >(); |
| } |
| |
| void filtered_test() |
| { |
| filtered_test_all_predicates< std::vector< int > >(); |
| filtered_test_all_predicates< std::list< int > >(); |
| filtered_test_all_predicates< std::set< int > >(); |
| filtered_test_all_predicates< std::multiset< int > >(); |
| } |
| } |
| } |
| |
| boost::unit_test::test_suite* |
| init_unit_test_suite(int argc, char* argv[]) |
| { |
| boost::unit_test::test_suite* test |
| = BOOST_TEST_SUITE( "RangeTestSuite.adaptor.filtered" ); |
| |
| test->add( BOOST_TEST_CASE( &boost::filtered_test ) ); |
| |
| return test; |
| } |