1//---------------------------------------------------------------------------//
2// Copyright (c) 2013 Kyle Lutz <kyle.r.lutz@gmail.com>
3//
4// Distributed under the Boost Software License, Version 1.0
5// See accompanying file LICENSE_1_0.txt or copy at
6// http://www.boost.org/LICENSE_1_0.txt
7//
8// See http://boostorg.github.com/compute for more information.
9//---------------------------------------------------------------------------//
10
11#define BOOST_TEST_MODULE TestTransformIterator
12#include <boost/test/unit_test.hpp>
13
14#include <iterator>
15
16#include <boost/type_traits.hpp>
17#include <boost/static_assert.hpp>
18
19#include <boost/compute/types.hpp>
20#include <boost/compute/functional.hpp>
21#include <boost/compute/algorithm/copy.hpp>
22#include <boost/compute/container/vector.hpp>
23#include <boost/compute/iterator/buffer_iterator.hpp>
24#include <boost/compute/iterator/transform_iterator.hpp>
25
26#include "check_macros.hpp"
27#include "context_setup.hpp"
28
29BOOST_AUTO_TEST_CASE(value_type)
30{
31 using boost::compute::float4_;
32
33 BOOST_STATIC_ASSERT((
34 boost::is_same<
35 boost::compute::transform_iterator<
36 boost::compute::buffer_iterator<float>,
37 boost::compute::sqrt<float>
38 >::value_type,
39 float
40 >::value
41 ));
42 BOOST_STATIC_ASSERT((
43 boost::is_same<
44 boost::compute::transform_iterator<
45 boost::compute::buffer_iterator<float4_>,
46 boost::compute::length<float4_>
47 >::value_type,
48 float
49 >::value
50 ));
51}
52
53BOOST_AUTO_TEST_CASE(base_type)
54{
55 BOOST_STATIC_ASSERT((
56 boost::is_same<
57 boost::compute::transform_iterator<
58 boost::compute::buffer_iterator<int>, boost::compute::abs<int>
59 >::base_type,
60 boost::compute::buffer_iterator<int>
61 >::value
62 ));
63}
64
65BOOST_AUTO_TEST_CASE(copy)
66{
67 int data[] = { 1, -2, 3, -4, 5 };
68 boost::compute::vector<int> a(data, data + 5, queue);
69
70 boost::compute::vector<int> b(5, context);
71 boost::compute::copy(
72 boost::compute::make_transform_iterator(
73 a.begin(),
74 boost::compute::abs<int>()
75 ),
76 boost::compute::make_transform_iterator(
77 a.end(),
78 boost::compute::abs<int>()
79 ),
80 b.begin(),
81 queue
82 );
83 CHECK_RANGE_EQUAL(int, 5, b, (1, 2, 3, 4, 5));
84}
85
86BOOST_AUTO_TEST_CASE(copy_abs_doctest)
87{
88 int data[] = { -1, -2, -3, -4 };
89 boost::compute::vector<int> input(data, data + 4, queue);
90 boost::compute::vector<int> output(4, context);
91
92//! [copy_abs]
93// use abs() from boost.compute
94using boost::compute::abs;
95
96// copy the absolute value for each element in input to output
97boost::compute::copy(
98 first: boost::compute::make_transform_iterator(iterator: input.begin(), transform: abs<int>()),
99 last: boost::compute::make_transform_iterator(iterator: input.end(), transform: abs<int>()),
100 result: output.begin(),
101 queue
102);
103//! [copy_abs]
104
105 CHECK_RANGE_EQUAL(int, 4, output, (1, 2, 3, 4));
106}
107
108BOOST_AUTO_TEST_SUITE_END()
109

source code of boost/libs/compute/test/test_transform_iterator.cpp