1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 // <vector>
10 
11 //       reference operator[](size_type __i);
12 // const_reference operator[](size_type __i) const;
13 //
14 //       reference at(size_type __i);
15 // const_reference at(size_type __i) const;
16 //
17 //       reference front();
18 // const_reference front() const;
19 //
20 //       reference back();
21 // const_reference back() const;
22 // libc++ marks these as 'noexcept' (except 'at')
23 
24 #include <vector>
25 #include <cassert>
26 #include <stdexcept>
27 
28 #include "min_allocator.h"
29 #include "test_macros.h"
30 
31 template <class C>
32 C
33 make(int size, int start)
34 {
35     C c;
36     for (int i = 0; i < size; ++i)
37         c.push_back(start + i);
38     return c;
39 }
40 
41 template <class Vector>
42 void test_get_basic(Vector& c, int start_value) {
43     const int n = static_cast<int>(c.size());
44     for (int i = 0; i < n; ++i)
45         assert(c[i] == start_value + i);
46     for (int i = 0; i < n; ++i)
47         assert(c.at(i) == start_value + i);
48 
49 #ifndef TEST_HAS_NO_EXCEPTIONS
50     try {
51         TEST_IGNORE_NODISCARD c.at(n);
52         assert(false);
53     } catch (const std::out_of_range&) {}
54 #endif
55 
56     assert(c.front() == start_value);
57     assert(c.back() == start_value + n - 1);
58 }
59 
60 template <class Vector>
61 void test_get() {
62     int start_value = 35;
63     Vector c = make<Vector>(10, start_value);
64     const Vector& cc = c;
65     test_get_basic(c, start_value);
66     test_get_basic(cc, start_value);
67 }
68 
69 template <class Vector>
70 void test_set() {
71     int start_value = 35;
72     const int n = 10;
73     Vector c = make<Vector>(n, start_value);
74 
75     for (int i = 0; i < n; ++i) {
76         assert(c[i] == start_value + i);
77         c[i] = start_value + i + 1;
78         assert(c[i] == start_value + i + 1);
79     }
80     for (int i = 0; i < n; ++i) {
81         assert(c.at(i) == start_value + i + 1);
82         c.at(i) = start_value + i + 2;
83         assert(c.at(i) == start_value + i + 2);
84     }
85 
86     assert(c.front() == start_value + 2);
87     c.front() = start_value + 3;
88     assert(c.front() == start_value + 3);
89 
90     assert(c.back() == start_value + n + 1);
91     c.back() = start_value + n + 2;
92     assert(c.back() == start_value + n + 2);
93 }
94 
95 template <class Vector>
96 void test() {
97     test_get<Vector>();
98     test_set<Vector>();
99 
100     Vector c;
101     const Vector& cc = c;
102     ASSERT_SAME_TYPE(typename Vector::reference, decltype(c[0]));
103     ASSERT_SAME_TYPE(typename Vector::const_reference, decltype(cc[0]));
104 
105     ASSERT_SAME_TYPE(typename Vector::reference, decltype(c.at(0)));
106     ASSERT_SAME_TYPE(typename Vector::const_reference, decltype(cc.at(0)));
107 
108     ASSERT_SAME_TYPE(typename Vector::reference, decltype(c.front()));
109     ASSERT_SAME_TYPE(typename Vector::const_reference, decltype(cc.front()));
110 
111     ASSERT_SAME_TYPE(typename Vector::reference, decltype(c.back()));
112     ASSERT_SAME_TYPE(typename Vector::const_reference, decltype(cc.back()));
113 }
114 
115 int main(int, char**)
116 {
117     test<std::vector<int> >();
118 #if TEST_STD_VER >= 11
119     test<std::vector<int, min_allocator<int> > >();
120 #endif
121 
122   return 0;
123 }
124