1// Boost.Range library
2//
3// Copyright Neil Groves 2009. Use, modification and
4// distribution is subject to the Boost Software License, Version
5// 1.0. (See accompanying file LICENSE_1_0.txt or copy at
6// http://www.boost.org/LICENSE_1_0.txt)
7//
8//
9// For more information, see http://www.boost.org/libs/range/
10//
11//[filtered_example
12#include <boost/range/adaptor/filtered.hpp>
13#include <boost/range/algorithm/copy.hpp>
14#include <boost/assign.hpp>
15#include <iterator>
16#include <iostream>
17#include <vector>
18
19//<-
20#include <boost/test/test_tools.hpp>
21#include <boost/test/unit_test.hpp>
22
23#include <boost/range/algorithm_ext/push_back.hpp>
24
25namespace
26{
27//->
28struct is_even
29{
30 bool operator()( int x ) const { return x % 2 == 0; }
31};
32
33//<-
34void filtered_example_test()
35//->
36//=int main(int argc, const char* argv[])
37{
38 using namespace boost::assign;
39 using namespace boost::adaptors;
40
41 std::vector<int> input;
42 input += 1,2,3,4,5,6,7,8,9;
43
44 boost::copy(
45 rng: input | filtered(is_even()),
46 out: std::ostream_iterator<int>(std::cout, ","));
47
48//= return 0;
49//=}
50//]
51 std::vector<int> reference;
52 reference += 2,4,6,8;
53
54 std::vector<int> test;
55 boost::push_back(on&: test, from: input | filtered(is_even()));
56
57 BOOST_CHECK_EQUAL_COLLECTIONS( reference.begin(), reference.end(),
58 test.begin(), test.end() );
59}
60}
61
62boost::unit_test::test_suite*
63init_unit_test_suite(int argc, char* argv[])
64{
65 boost::unit_test::test_suite* test
66 = BOOST_TEST_SUITE( "RangeTestSuite.adaptor.filtered_example" );
67
68 test->add( BOOST_TEST_CASE( &filtered_example_test ) );
69
70 return test;
71}
72

source code of boost/libs/range/test/adaptor_test/filtered_example.cpp