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
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
|
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// bitset(string, pos, n, zero, one); // constexpr since C++23
#include <bitset>
#include <algorithm> // for 'min' and 'max'
#include <cassert>
#include <stdexcept> // for 'invalid_argument'
#include <string>
#include "test_macros.h"
template <std::size_t N>
TEST_CONSTEXPR_CXX23 void test_string_ctor() {
#ifndef TEST_HAS_NO_EXCEPTIONS
if (!TEST_IS_CONSTANT_EVALUATED) {
try {
std::string s("xxx1010101010xxxx");
std::bitset<N> v(s, s.size()+1, 10);
assert(false);
}
catch (std::out_of_range&)
{
}
try {
std::string s("xxx1010101010xxxx");
std::bitset<N> v(s, 2, 10);
assert(false);
}
catch (std::invalid_argument&)
{
}
try {
std::string s("xxxbababababaxxxx");
std::bitset<N> v(s, 2, 10, 'a', 'b');
assert(false);
}
catch (std::invalid_argument&)
{
}
}
#endif // TEST_HAS_NO_EXCEPTIONS
{
std::string s("xxx1010101010xxxx");
std::bitset<N> v(s, 3, 10);
std::size_t M = std::min<std::size_t>(v.size(), 10);
for (std::size_t i = 0; i < M; ++i)
assert(v[i] == (s[3 + M - 1 - i] == '1'));
for (std::size_t i = 10; i < v.size(); ++i)
assert(v[i] == false);
}
{
std::string s("xxxbababababaxxxx");
std::bitset<N> v(s, 3, 10, 'a', 'b');
std::size_t M = std::min<std::size_t>(v.size(), 10);
for (std::size_t i = 0; i < M; ++i)
assert(v[i] == (s[3 + M - 1 - i] == 'b'));
for (std::size_t i = 10; i < v.size(); ++i)
assert(v[i] == false);
}
}
struct Nonsense {
virtual ~Nonsense() {}
};
TEST_CONSTEXPR_CXX23 void test_for_non_eager_instantiation() {
// Ensure we don't accidentally instantiate `std::basic_string<Nonsense>`
// since it may not be well formed and can cause an error in the
// non-immediate context.
static_assert(!std::is_constructible<std::bitset<3>, Nonsense*>::value, "");
static_assert(!std::is_constructible<std::bitset<3>, Nonsense*, size_t, Nonsense&, Nonsense&>::value, "");
}
TEST_CONSTEXPR_CXX23 bool test() {
test_string_ctor<0>();
test_string_ctor<1>();
test_string_ctor<31>();
test_string_ctor<32>();
test_string_ctor<33>();
test_string_ctor<63>();
test_string_ctor<64>();
test_string_ctor<65>();
test_string_ctor<1000>();
test_for_non_eager_instantiation();
return true;
}
int main(int, char**) {
test();
#if TEST_STD_VER > 20
static_assert(test());
#endif
return 0;
}
|
