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 // test bitset(string, pos, n, zero, one);
10 
11 #include <bitset>
12 #include <algorithm> // for 'min' and 'max'
13 #include <cassert>
14 #include <stdexcept> // for 'invalid_argument'
15 #include <string>
16 
17 #include "test_macros.h"
18 
19 template <std::size_t N>
20 void test_string_ctor() {
21 #ifndef TEST_HAS_NO_EXCEPTIONS
22     {
23         try {
24             std::string s("xxx1010101010xxxx");
25             std::bitset<N> v(s, s.size()+1, 10);
26             assert(false);
27         }
28         catch (std::out_of_range&)
29         {
30         }
31     }
32     {
33         try {
34             std::string s("xxx1010101010xxxx");
35             std::bitset<N> v(s, 2, 10);
36             assert(false);
37         }
38         catch (std::invalid_argument&)
39         {
40         }
41     }
42     {
43         try {
44             std::string s("xxxbababababaxxxx");
45             std::bitset<N> v(s, 2, 10, 'a', 'b');
46             assert(false);
47         }
48         catch (std::invalid_argument&)
49         {
50         }
51     }
52 #endif // TEST_HAS_NO_EXCEPTIONS
53     {
54         std::string s("xxx1010101010xxxx");
55         std::bitset<N> v(s, 3, 10);
56         std::size_t M = std::min<std::size_t>(v.size(), 10);
57         for (std::size_t i = 0; i < M; ++i)
58             assert(v[i] == (s[3 + M - 1 - i] == '1'));
59         for (std::size_t i = 10; i < v.size(); ++i)
60             assert(v[i] == false);
61     }
62     {
63         std::string s("xxxbababababaxxxx");
64         std::bitset<N> v(s, 3, 10, 'a', 'b');
65         std::size_t M = std::min<std::size_t>(v.size(), 10);
66         for (std::size_t i = 0; i < M; ++i)
67             assert(v[i] == (s[3 + M - 1 - i] == 'b'));
68         for (std::size_t i = 10; i < v.size(); ++i)
69             assert(v[i] == false);
70     }
71 }
72 
73 struct Nonsense {
74     virtual ~Nonsense() {}
75 };
76 
77 void test_for_non_eager_instantiation() {
78     // Ensure we don't accidentally instantiate `std::basic_string<Nonsense>`
79     // since it may not be well formed and can cause an error in the
80     // non-immediate context.
81     static_assert(!std::is_constructible<std::bitset<3>, Nonsense*>::value, "");
82     static_assert(!std::is_constructible<std::bitset<3>, Nonsense*, size_t, Nonsense&, Nonsense&>::value, "");
83 }
84 
85 int main(int, char**) {
86     test_string_ctor<0>();
87     test_string_ctor<1>();
88     test_string_ctor<31>();
89     test_string_ctor<32>();
90     test_string_ctor<33>();
91     test_string_ctor<63>();
92     test_string_ctor<64>();
93     test_string_ctor<65>();
94     test_string_ctor<1000>();
95     test_for_non_eager_instantiation();
96 
97     return 0;
98 }
99