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// 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/
//
//[indexed_example
//<-
#include <boost/config.hpp>
//->
#include <boost/range/adaptor/indexed.hpp>
#include <boost/assign.hpp>
#include <iterator>
#include <iostream>
#include <vector>
//<-
#include <boost/test/test_tools.hpp>
#include <boost/test/unit_test.hpp>
namespace
{
template<class Iterator1, class Iterator2>
void check_element_and_index(
Iterator1 test_first,
Iterator1 test_last,
Iterator2 reference_first,
Iterator2 reference_last)
{
BOOST_CHECK_EQUAL( std::distance(test_first, test_last),
std::distance(reference_first, reference_last) );
std::ptrdiff_t reference_index = 0;
Iterator1 test_it = test_first;
Iterator2 reference_it = reference_first;
for (; test_it != test_last; ++test_it, ++reference_it, ++reference_index)
{
BOOST_CHECK_EQUAL(test_it->value(), *reference_it);
BOOST_CHECK_EQUAL(test_it->index(), reference_index);
}
}
template<class SinglePassRange1, class SinglePassRange2>
void check_element_and_index(
const SinglePassRange1& test_rng,
const SinglePassRange2& reference_rng)
{
check_element_and_index(
boost::begin(test_rng), boost::end(test_rng),
boost::begin(reference_rng), boost::end(reference_rng));
}
//->
//<-
void indexed_example_test()
//->
//=int main(int argc, const char* argv[])
{
using namespace boost::assign;
using namespace boost::adaptors;
std::vector<int> input;
input += 10,20,30,40,50,60,70,80,90;
//<-
#ifndef BOOST_NO_CXX11_RANGE_BASED_FOR
//->
for (const auto& element : input | indexed(0))
{
std::cout << "Element = " << element.value()
<< " Index = " << element.index()
<< std::endl;
}
//<-
#endif // C++11 has range for loop
//->
//= return 0;
//=}
//]
check_element_and_index(
input | indexed(0),
input);
}
}
boost::unit_test::test_suite*
init_unit_test_suite(int argc, char* argv[])
{
boost::unit_test::test_suite* test
= BOOST_TEST_SUITE( "RangeTestSuite.adaptor.indexed_example" );
test->add( BOOST_TEST_CASE( &indexed_example_test ) );
return test;
}
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