1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
|
// Boost.Range library
//
// Copyright Neil Groves 2010. 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/irange.hpp>
#include <boost/range/algorithm_ext.hpp>
#include <boost/range/begin.hpp>
#include <boost/range/end.hpp>
#include <boost/test/test_tools.hpp>
#include <boost/test/unit_test.hpp>
#include <vector>
namespace boost
{
// Test an integer range with a step size of 1.
template<typename Integer>
void test_irange_impl(Integer last)
{
std::vector<Integer> reference;
for (Integer i = static_cast<Integer>(0); i < last; ++i)
{
reference.push_back(i);
}
std::vector<Integer> test;
boost::push_back(test, boost::irange(last));
BOOST_CHECK_EQUAL_COLLECTIONS( test.begin(), test.end(),
reference.begin(), reference.end() );
}
// Test an integer range with a step size of 1.
template<typename Integer>
void test_irange_impl(Integer first, Integer last)
{
std::vector<Integer> reference;
for (Integer i = first; i < last; ++i)
{
reference.push_back(i);
}
std::vector<Integer> test;
boost::push_back(test, boost::irange(first, last));
BOOST_CHECK_EQUAL_COLLECTIONS( test.begin(), test.end(),
reference.begin(), reference.end() );
}
// Test an integer range with a runtime specified step size.
template<typename Integer, typename IntegerInput>
void test_irange_impl(IntegerInput first, IntegerInput last, int step)
{
BOOST_ASSERT( step != 0 );
// Skip tests that have negative values if the type is
// unsigned
if ((static_cast<IntegerInput>(static_cast<Integer>(first)) != first)
|| (static_cast<IntegerInput>(static_cast<Integer>(last)) != last))
return;
std::vector<Integer> reference;
const std::ptrdiff_t first_p = static_cast<std::ptrdiff_t>(first);
const std::ptrdiff_t last_p = static_cast<std::ptrdiff_t>(last);
const std::ptrdiff_t step_p = static_cast<std::ptrdiff_t>(step);
for (std::ptrdiff_t current_value = first_p;
step_p >= 0 ? current_value < last_p : current_value > last_p;
current_value += step_p)
reference.push_back(current_value);
std::vector<Integer> test;
boost::push_back(test, boost::irange(first, last, step));
BOOST_CHECK_EQUAL_COLLECTIONS( test.begin(), test.end(),
reference.begin(), reference.end() );
}
// Test driver function that for an integer range [first, last)
// drives the test implementation through various integer
// types.
void test_irange(int last)
{
test_irange_impl<signed char>(last);
test_irange_impl<unsigned char>(last);
test_irange_impl<signed short>(last);
test_irange_impl<unsigned short>(last);
test_irange_impl<signed int>(last);
test_irange_impl<unsigned int>(last);
test_irange_impl<signed long>(last);
test_irange_impl<unsigned long>(last);
}
// Test driver function that for an integer range [first, last)
// drives the test implementation through various integer
// types.
void test_irange(int first, int last)
{
test_irange_impl<signed char>(first,last);
test_irange_impl<unsigned char>(first, last);
test_irange_impl<signed short>(first, last);
test_irange_impl<unsigned short>(first, last);
test_irange_impl<signed int>(first, last);
test_irange_impl<unsigned int>(first, last);
test_irange_impl<signed long>(first, last);
test_irange_impl<unsigned long>(first, last);
}
// Test driver function that for an integer range [first, last)
// drives the test implementation through various integer
// types step_size items at a time.
void test_irange(int first, int last, int step_size)
{
BOOST_ASSERT( step_size != 0 );
test_irange_impl<signed char>(first, last, step_size);
test_irange_impl<unsigned char>(first, last, step_size);
test_irange_impl<signed short>(first, last, step_size);
test_irange_impl<unsigned short>(first, last, step_size);
test_irange_impl<signed int>(first, last, step_size);
test_irange_impl<unsigned int>(first, last, step_size);
test_irange_impl<signed long>(first, last, step_size);
test_irange_impl<unsigned long>(first, last, step_size);
}
// Implementation of the unit test for the integer range
// function.
// This starts the test drivers to drive a set of integer types
// for a combination of range values chosen to exercise a large
// number of implementation branches.
void irange_unit_test()
{
// Test the single-step version of irange(last)
test_irange(0);
test_irange(1);
test_irange(10);
// Test the single-step version of irange(first, last)
test_irange(0, 0);
test_irange(0, 1);
test_irange(0, 10);
test_irange(1, 1);
test_irange(1, 2);
test_irange(1, 11);
// Test the n-step version of irange(first, last, step-size)
test_irange(0, 0, 1);
test_irange(0, 0, -1);
test_irange(0, 10, 1);
test_irange(10, 0, -1);
test_irange(0, 2, 2);
test_irange(2, 0, -2);
test_irange(0, 9, 2);
test_irange(9, 0, -2);
test_irange(-9, 0, 2);
test_irange(-9, 9, 2);
test_irange(9, -9, -2);
test_irange(10, 20, 5);
test_irange(20, 10, -5);
test_irange(0, 0, 3);
test_irange(0, 1, 3);
test_irange(0, 2, 3);
test_irange(0, 3, 3);
test_irange(0, 4, 3);
test_irange(0, 10, 3);
test_irange(0, 0, -3);
test_irange(0, -1, -3);
test_irange(0, -2, -3);
test_irange(0, -3, -3);
test_irange(0, -4, -3);
test_irange(0, -10, -3);
}
} // namespace boost
boost::unit_test::test_suite*
init_unit_test_suite(int argc, char* argv[])
{
boost::unit_test::test_suite* test
= BOOST_TEST_SUITE( "RangeTestSuite.irange" );
test->add(BOOST_TEST_CASE( &boost::irange_unit_test ));
return test;
}
|
