1 //===----------------------------------------------------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 // <deque>
11 
12 // void pop_back()
13 
14 #include <deque>
15 #include <cassert>
16 
17 #include "../../../min_allocator.h"
18 
19 template <class C>
20 C
21 make(int size, int start = 0 )
22 {
23     const int b = 4096 / sizeof(int);
24     int init = 0;
25     if (start > 0)
26     {
27         init = (start+1) / b + ((start+1) % b != 0);
28         init *= b;
29         --init;
30     }
31     C c(init, 0);
32     for (int i = 0; i < init-start; ++i)
33         c.pop_back();
34     for (int i = 0; i < size; ++i)
35         c.push_back(i);
36     for (int i = 0; i < start; ++i)
37         c.pop_front();
38     return c;
39 };
40 
41 template <class C>
42 void
43 test(C& c1)
44 {
45     typedef typename C::iterator I;
46     std::size_t c1_osize = c1.size();
47     c1.pop_back();
48     assert(c1.size() == c1_osize - 1);
49     assert(distance(c1.begin(), c1.end()) == c1.size());
50     I i = c1.begin();
51     for (int j = 0; j < c1.size(); ++j, ++i)
52         assert(*i == j);
53 }
54 
55 template <class C>
56 void
57 testN(int start, int N)
58 {
59     if (N != 0)
60     {
61         C c1 = make<C>(N, start);
62         test(c1);
63     }
64 }
65 
66 int main()
67 {
68     {
69     int rng[] = {0, 1, 2, 3, 1023, 1024, 1025, 2047, 2048, 2049};
70     const int N = sizeof(rng)/sizeof(rng[0]);
71     for (int i = 0; i < N; ++i)
72         for (int j = 0; j < N; ++j)
73             testN<std::deque<int> >(rng[i], rng[j]);
74     }
75 #if __cplusplus >= 201103L
76     {
77     int rng[] = {0, 1, 2, 3, 1023, 1024, 1025, 2047, 2048, 2049};
78     const int N = sizeof(rng)/sizeof(rng[0]);
79     for (int i = 0; i < N; ++i)
80         for (int j = 0; j < N; ++j)
81             testN<std::deque<int, min_allocator<int>> >(rng[i], rng[j]);
82     }
83 #endif
84 }
85