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
|
//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// <deque>
// Optimization for deque::iterators
// template <class InputIterator, class OutputIterator>
// OutputIterator
// move_backward(InputIterator first, InputIterator last, OutputIterator result);
#include <deque>
#include <cassert>
#include "test_iterators.h"
#include "min_allocator.h"
template <class C>
C
make(int size, int start = 0 )
{
const int b = 4096 / sizeof(int);
int init = 0;
if (start > 0)
{
init = (start+1) / b + ((start+1) % b != 0);
init *= b;
--init;
}
C c(init, 0);
for (int i = 0; i < init-start; ++i)
c.pop_back();
for (int i = 0; i < size; ++i)
c.push_back(i);
for (int i = 0; i < start; ++i)
c.pop_front();
return c;
}
template <class C>
void testN(int start, int N)
{
typedef typename C::iterator I;
typedef typename C::const_iterator CI;
typedef random_access_iterator<I> RAI;
typedef random_access_iterator<CI> RACI;
C c1 = make<C>(N, start);
C c2 = make<C>(N);
assert(std::move_backward(c1.cbegin(), c1.cend(), c2.end()) == c2.begin());
assert(c1 == c2);
assert(std::move_backward(c2.cbegin(), c2.cend(), c1.end()) == c1.begin());
assert(c1 == c2);
assert(std::move_backward(c1.cbegin(), c1.cend(), RAI(c2.end())) == RAI(c2.begin()));
assert(c1 == c2);
assert(std::move_backward(c2.cbegin(), c2.cend(), RAI(c1.end())) == RAI(c1.begin()));
assert(c1 == c2);
assert(std::move_backward(RACI(c1.cbegin()), RACI(c1.cend()), c2.end()) == c2.begin());
assert(c1 == c2);
assert(std::move_backward(RACI(c2.cbegin()), RACI(c2.cend()), c1.end()) == c1.begin());
assert(c1 == c2);
}
int main()
{
{
int rng[] = {0, 1, 2, 3, 1023, 1024, 1025, 2047, 2048, 2049};
const int N = sizeof(rng)/sizeof(rng[0]);
for (int i = 0; i < N; ++i)
for (int j = 0; j < N; ++j)
testN<std::deque<int> >(rng[i], rng[j]);
}
#if __cplusplus >= 201103L
{
int rng[] = {0, 1, 2, 3, 1023, 1024, 1025, 2047, 2048, 2049};
const int N = sizeof(rng)/sizeof(rng[0]);
for (int i = 0; i < N; ++i)
for (int j = 0; j < N; ++j)
testN<std::deque<int, min_allocator<int> > >(rng[i], rng[j]);
}
#endif
}
|
