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 // REQUIRES: long_tests
11
12 // <deque>
13
14 // iterator erase(const_iterator f, const_iterator l)
15
16 #include <deque>
17 #include <algorithm>
18 #include <iterator>
19 #include <cassert>
20 #include <cstddef>
21
22 #include "min_allocator.h"
23 #include "test_macros.h"
24
25 #ifndef TEST_HAS_NO_EXCEPTIONS
26 struct Throws {
ThrowsThrows27 Throws() : v_(0) {}
ThrowsThrows28 Throws(int v) : v_(v) {}
ThrowsThrows29 Throws(const Throws &rhs) : v_(rhs.v_) { if (sThrows) throw 1; }
ThrowsThrows30 Throws( Throws &&rhs) : v_(rhs.v_) { if (sThrows) throw 1; }
operator =Throws31 Throws& operator=(const Throws &rhs) { v_ = rhs.v_; return *this; }
operator =Throws32 Throws& operator=( Throws &&rhs) { v_ = rhs.v_; return *this; }
33 int v_;
34
35 static bool sThrows;
36 };
37
38 bool Throws::sThrows = false;
39 #endif
40
41
42 template <class C>
43 C
make(int size,int start=0)44 make(int size, int start = 0 )
45 {
46 const int b = 4096 / sizeof(int);
47 int init = 0;
48 if (start > 0)
49 {
50 init = (start+1) / b + ((start+1) % b != 0);
51 init *= b;
52 --init;
53 }
54 C c(init, 0);
55 for (int i = 0; i < init-start; ++i)
56 c.pop_back();
57 for (int i = 0; i < size; ++i)
58 c.push_back(i);
59 for (int i = 0; i < start; ++i)
60 c.pop_front();
61 return c;
62 }
63
64 template <class C>
65 void
test(int P,C & c1,int size)66 test(int P, C& c1, int size)
67 {
68 typedef typename C::iterator I;
69 assert(static_cast<std::size_t>(P + size) <= c1.size());
70 std::size_t c1_osize = c1.size();
71 I i = c1.erase(c1.cbegin() + P, c1.cbegin() + (P + size));
72 assert(i == c1.begin() + P);
73 assert(c1.size() == c1_osize - size);
74 assert(static_cast<std::size_t>(distance(c1.begin(), c1.end())) == c1.size());
75 i = c1.begin();
76 int j = 0;
77 for (; j < P; ++j, ++i)
78 assert(*i == j);
79 for (j += size; static_cast<std::size_t>(j) < c1_osize; ++j, ++i)
80 assert(*i == j);
81 }
82
83 template <class C>
84 void
testN(int start,int N)85 testN(int start, int N)
86 {
87 int pstep = std::max(N / std::max(std::min(N, 10), 1), 1);
88 for (int p = 0; p <= N; p += pstep)
89 {
90 int sstep = std::max((N - p) / std::max(std::min(N - p, 10), 1), 1);
91 for (int s = 0; s <= N - p; s += sstep)
92 {
93 C c1 = make<C>(N, start);
94 test(p, c1, s);
95 }
96 }
97 }
98
main()99 int main()
100 {
101 {
102 int rng[] = {0, 1, 2, 3, 1023, 1024, 1025, 2047, 2048, 2049};
103 const int N = sizeof(rng)/sizeof(rng[0]);
104 for (int i = 0; i < N; ++i)
105 for (int j = 0; j < N; ++j)
106 testN<std::deque<int> >(rng[i], rng[j]);
107 }
108 #if TEST_STD_VER >= 11
109 {
110 int rng[] = {0, 1, 2, 3, 1023, 1024, 1025, 2047, 2048, 2049};
111 const int N = sizeof(rng)/sizeof(rng[0]);
112 for (int i = 0; i < N; ++i)
113 for (int j = 0; j < N; ++j)
114 testN<std::deque<int, min_allocator<int>> >(rng[i], rng[j]);
115 }
116 #endif
117 #ifndef TEST_HAS_NO_EXCEPTIONS
118 // Test for LWG2953:
119 // Throws: Nothing unless an exception is thrown by the assignment operator of T.
120 // (which includes move assignment)
121 {
122 Throws arr[] = {1, 2, 3};
123 std::deque<Throws> v(arr, arr+3);
124 Throws::sThrows = true;
125 v.erase(v.begin(), --v.end());
126 assert(v.size() == 1);
127 v.erase(v.begin(), v.end());
128 assert(v.size() == 0);
129 }
130 #endif
131 }
132