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//[transformed_example
12#include <boost/range/adaptor/transformed.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 double_int
29{
30 typedef int result_type;
31 int operator()(int x) const { return x * 2; }
32};
33
34//<-
35void transformed_example_test()
36//->
37//=int main(int argc, const char* argv[])
38{
39 using namespace boost::adaptors;
40 using namespace boost::assign;
41
42 std::vector<int> input;
43 input += 1,2,3,4,5,6,7,8,9,10;
44
45 boost::copy(
46 rng: input | transformed(double_int()),
47 out: std::ostream_iterator<int>(std::cout, ","));
48
49//= return 0;
50//=}
51//]
52 std::vector<int> reference;
53 reference += 2,4,6,8,10,12,14,16,18,20;
54
55 std::vector<int> test;
56 boost::push_back(on&: test, from: input | transformed(double_int()));
57
58 BOOST_CHECK_EQUAL_COLLECTIONS( reference.begin(), reference.end(),
59 test.begin(), test.end() );
60}
61}
62
63boost::unit_test::test_suite*
64init_unit_test_suite(int argc, char* argv[])
65{
66 boost::unit_test::test_suite* test
67 = BOOST_TEST_SUITE( "RangeTestSuite.adaptor.transformed_example" );
68
69 test->add( BOOST_TEST_CASE( &transformed_example_test ) );
70
71 return test;
72}
73

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