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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/
//
#include <boost/range/adaptor/transformed.hpp>
#include <boost/test/test_tools.hpp>
#include <boost/test/unit_test.hpp>
#include <boost/assign.hpp>
#include <boost/bind/bind.hpp>
#include <boost/range/algorithm_ext.hpp>
#include <algorithm>
#include <list>
#include <set>
#include <vector>
namespace boost
{
namespace
{
struct double_x
{
typedef int result_type;
int operator()(int x) const { return x * 2; }
};
struct halve_x
{
typedef int result_type;
int operator()(int x) const { return x / 2; }
};
struct lambda_init
{
};
struct lambda
{
typedef int result_type;
lambda(const lambda_init& init) {}
lambda(const lambda& rhs) {}
int operator()(int x) const { return x + 1; }
private:
lambda() {}
lambda& operator=(const lambda& rhs) { return *this; }
};
template< class Container, class TransformFn >
void transformed_test_impl_core( Container& c, TransformFn fn )
{
using namespace boost::adaptors;
std::vector< int > test_result1;
boost::push_back(test_result1, c | transformed(fn));
std::vector< int > test_result2;
boost::push_back(test_result2, adaptors::transform(c, fn));
std::vector< int > reference;
std::transform(c.begin(), c.end(), std::back_inserter(reference), fn);
BOOST_CHECK_EQUAL_COLLECTIONS( reference.begin(), reference.end(),
test_result1.begin(), test_result1.end() );
BOOST_CHECK_EQUAL_COLLECTIONS( reference.begin(), reference.end(),
test_result2.begin(), test_result2.end() );
}
template< class Rng >
void check_copy_assign(Rng r)
{
Rng r2 = r;
r2 = r;
}
template< class Container, class TransformFn >
void transformed_range_copy_assign(Container& c, TransformFn fn)
{
using namespace boost::adaptors;
check_copy_assign(c | transformed(fn));
check_copy_assign(adaptors::transform(c, fn));
}
template< class Container, class TransformFn, class TransformFnInit >
void transformed_test_fn_impl()
{
using namespace boost::assign;
Container c;
TransformFnInit init;
TransformFn fn( init );
// Test empty
transformed_test_impl_core(c, fn);
// Test one element
c += 1;
transformed_test_impl_core(c, fn);
// Test many elements
c += 1,1,1,2,2,2,2,2,3,4,5,6,7,8,9;
transformed_test_impl_core(c, fn);
// test the range and iterator are copy assignable
transformed_range_copy_assign(c, fn);
}
template< class Container >
void transformed_test_impl()
{
transformed_test_fn_impl< Container, double_x, double_x >();
transformed_test_fn_impl< Container, halve_x, halve_x >();
transformed_test_fn_impl< Container, lambda, lambda_init >();
}
void transformed_test()
{
transformed_test_impl< std::vector< int > >();
transformed_test_impl< std::list< int > >();
transformed_test_impl< std::set< int > >();
transformed_test_impl< std::multiset< int > >();
}
struct foo_bind
{
int foo() const { return 7; }
};
void transformed_bind()
{
using namespace boost::adaptors;
using namespace boost::placeholders;
std::vector<foo_bind> input(5);
std::vector<int> output;
boost::range::push_back(
output,
input | transformed(boost::bind(&foo_bind::foo, _1)));
BOOST_CHECK_EQUAL(output.size(), input.size());
std::vector<int> reference_output(5, 7);
BOOST_CHECK_EQUAL_COLLECTIONS(
output.begin(), output.end(),
reference_output.begin(), reference_output.end());
}
}
}
boost::unit_test::test_suite*
init_unit_test_suite(int argc, char* argv[])
{
boost::unit_test::test_suite* test
= BOOST_TEST_SUITE( "RangeTestSuite.adaptor.transformed" );
test->add(BOOST_TEST_CASE(&boost::transformed_test));
test->add(BOOST_TEST_CASE(&boost::transformed_bind));
return test;
}
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