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_front()
13
14#include <deque>
15#include <cassert>
16
17#include "min_allocator.h"
18
19template <class C>
20C
21make(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
41template <class C>
42void
43test(C& c1)
44{
45    typedef typename C::iterator I;
46    std::size_t c1_osize = c1.size();
47    c1.pop_front();
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 = 1; j < c1.size(); ++j, ++i)
52        assert(*i == j);
53}
54
55template <class C>
56void
57testN(int start, int N)
58{
59    if (N != 0)
60    {
61        C c1 = make<C>(N, start);
62        test(c1);
63    }
64}
65
66int 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