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// template <class charT>
10// explicit bitset(const charT* str,
11// typename basic_string_view<charT>::size_type n = basic_string_view<charT>::npos, // s/string/string_view since C++26
12// charT zero = charT('0'), charT one = charT('1')); // constexpr since C++23
13
14#include <bitset>
15#include <algorithm> // for 'min' and 'max'
16#include <cassert>
17#include <stdexcept> // for 'invalid_argument'
18#include <type_traits>
19
20#include "test_macros.h"
21
22TEST_MSVC_DIAGNOSTIC_IGNORED(6294) // Ill-defined for-loop: initial condition does not satisfy test. Loop body not executed.
23
24template <std::size_t N>
25TEST_CONSTEXPR_CXX23 void test_char_pointer_ctor()
26{
27#ifndef TEST_HAS_NO_EXCEPTIONS
28 if (!TEST_IS_CONSTANT_EVALUATED) {
29 try {
30 std::bitset<N> v("xxx1010101010xxxx");
31 assert(false);
32 }
33 catch (std::invalid_argument&) {}
34 }
35#endif
36
37 static_assert(!std::is_convertible<const char*, std::bitset<N> >::value, "");
38 static_assert(std::is_constructible<std::bitset<N>, const char*>::value, "");
39 {
40 const char s[] = "1010101010";
41 std::bitset<N> v(s);
42 std::size_t M = std::min<std::size_t>(v.size(), 10);
43 for (std::size_t i = 0; i < M; ++i)
44 assert(v[i] == (s[M - 1 - i] == '1'));
45 for (std::size_t i = 10; i < v.size(); ++i)
46 assert(v[i] == false);
47 }
48 {
49 const char s[] = "1010101010";
50 std::bitset<N> v(s, 10);
51 std::size_t M = std::min<std::size_t>(v.size(), 10);
52 for (std::size_t i = 0; i < M; ++i)
53 assert(v[i] == (s[M - 1 - i] == '1'));
54 for (std::size_t i = 10; i < v.size(); ++i)
55 assert(v[i] == false);
56 }
57 {
58 const char s[] = "1a1a1a1a1a";
59 std::bitset<N> v(s, 10, 'a');
60 std::size_t M = std::min<std::size_t>(v.size(), 10);
61 for (std::size_t i = 0; i < M; ++i)
62 assert(v[i] == (s[M - 1 - i] == '1'));
63 for (std::size_t i = 10; i < v.size(); ++i)
64 assert(v[i] == false);
65 }
66 {
67 const char s[] = "bababababa";
68 std::bitset<N> v(s, 10, 'a', 'b');
69 std::size_t M = std::min<std::size_t>(v.size(), 10);
70 for (std::size_t i = 0; i < M; ++i)
71 assert(v[i] == (s[M - 1 - i] == 'b'));
72 for (std::size_t i = 10; i < v.size(); ++i)
73 assert(v[i] == false);
74 }
75 // Verify that this constructor doesn't read over the given bound.
76 // See https://github.com/llvm/llvm-project/issues/143684
77 {
78 const char not_null_terminated[] = {'1', '0', '1', '0', '1', '0', '1', '0', '1', '0'};
79 std::bitset<N> v(not_null_terminated, 10);
80 std::size_t M = std::min<std::size_t>(v.size(), 10);
81 for (std::size_t i = 0; i < M; ++i)
82 assert(v[i] == (not_null_terminated[M - 1 - i] == '1'));
83 for (std::size_t i = 10; i < v.size(); ++i)
84 assert(!v[i]);
85 }
86 {
87 const char not_null_terminated[] = {'1', 'a', '1', 'a', '1', 'a', '1', 'a', '1', 'a'};
88 std::bitset<N> v(not_null_terminated, 10, 'a');
89 std::size_t M = std::min<std::size_t>(v.size(), 10);
90 for (std::size_t i = 0; i < M; ++i)
91 assert(v[i] == (not_null_terminated[M - 1 - i] == '1'));
92 for (std::size_t i = 10; i < v.size(); ++i)
93 assert(!v[i]);
94 }
95 {
96 const char not_null_terminated[] = {'b', 'a', 'b', 'a', 'b', 'a', 'b', 'a', 'b', 'a'};
97 std::bitset<N> v(not_null_terminated, 10, 'a', 'b');
98 std::size_t M = std::min<std::size_t>(v.size(), 10);
99 for (std::size_t i = 0; i < M; ++i)
100 assert(v[i] == (not_null_terminated[M - 1 - i] == 'b'));
101 for (std::size_t i = 10; i < v.size(); ++i)
102 assert(!v[i]);
103 }
104}
105
106TEST_CONSTEXPR_CXX23 bool test() {
107 test_char_pointer_ctor<0>();
108 test_char_pointer_ctor<1>();
109 test_char_pointer_ctor<31>();
110 test_char_pointer_ctor<32>();
111 test_char_pointer_ctor<33>();
112 test_char_pointer_ctor<63>();
113 test_char_pointer_ctor<64>();
114 test_char_pointer_ctor<65>();
115 test_char_pointer_ctor<1000>();
116
117 return true;
118}
119
120int main(int, char**)
121{
122 test();
123#if TEST_STD_VER > 20
124 static_assert(test());
125#endif
126
127 return 0;
128}
129

source code of libcxx/test/std/utilities/template.bitset/bitset.cons/char_ptr_ctor.pass.cpp