152 lines · cpp
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-exception6//7//===----------------------------------------------------------------------===//8 9// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20, c++2310 11// template<class charT, class traits>12// explicit bitset(13// const basic_string_view<charT,traits>& str,14// typename basic_string_view<charT,traits>::size_type pos = 0,15// typename basic_string_view<charT,traits>::size_type n = basic_string_view<charT,traits>::npos,16// charT zero = charT('0'), charT one = charT('1'));17 18#include <algorithm> // for 'min' and 'max'19#include <bitset>20#include <cassert>21#include <stdexcept> // for 'invalid_argument'22#include <string_view>23#include <type_traits>24 25#include "test_macros.h"26 27template <std::size_t N>28constexpr void test_string_ctor() {29#ifndef TEST_HAS_NO_EXCEPTIONS30 if (!TEST_IS_CONSTANT_EVALUATED) {31 try {32 std::string_view s("xxx1010101010xxxx");33 std::bitset<N> v(s, s.size() + 1);34 assert(false);35 } catch (std::out_of_range&) {36 }37 try {38 std::string_view s("xxx1010101010xxxx");39 std::bitset<N> v(s, s.size() + 1, 10);40 assert(false);41 } catch (std::out_of_range&) {42 }43 try {44 std::string_view s("xxx1010101010xxxx");45 std::bitset<N> v(s);46 assert(false);47 } catch (std::invalid_argument&) {48 }49 try {50 std::string_view s("xxx1010101010xxxx");51 std::bitset<N> v(s, 2);52 assert(false);53 } catch (std::invalid_argument&) {54 }55 try {56 std::string_view s("xxx1010101010xxxx");57 std::bitset<N> v(s, 2, 10);58 assert(false);59 } catch (std::invalid_argument&) {60 }61 try {62 std::string_view s("xxxbababababaxxxx");63 std::bitset<N> v(s, 2, 10, 'a', 'b');64 assert(false);65 } catch (std::invalid_argument&) {66 }67 }68#endif // TEST_HAS_NO_EXCEPTIONS69 70 static_assert(!std::is_convertible_v<std::string_view, std::bitset<N>>);71 static_assert(std::is_constructible_v<std::bitset<N>, std::string_view>);72 {73 std::string_view s("1010101010");74 std::bitset<N> v(s);75 std::size_t M = std::min<std::size_t>(v.size(), 10);76 for (std::size_t i = 0; i < M; ++i)77 assert(v[i] == (s[M - 1 - i] == '1'));78 for (std::size_t i = 10; i < v.size(); ++i)79 assert(v[i] == false);80 }81 {82 std::string_view s("xxx1010101010");83 std::bitset<N> v(s, 3);84 std::size_t M = std::min<std::size_t>(v.size(), 10);85 for (std::size_t i = 0; i < M; ++i)86 assert(v[i] == (s[3 + M - 1 - i] == '1'));87 for (std::size_t i = 10; i < v.size(); ++i)88 assert(v[i] == false);89 }90 {91 std::string_view s("xxx1010101010xxxx");92 std::bitset<N> v(s, 3, 10);93 std::size_t M = std::min<std::size_t>(v.size(), 10);94 for (std::size_t i = 0; i < M; ++i)95 assert(v[i] == (s[3 + M - 1 - i] == '1'));96 for (std::size_t i = 10; i < v.size(); ++i)97 assert(v[i] == false);98 }99 {100 std::string_view s("xxx1a1a1a1a1axxxx");101 std::bitset<N> v(s, 3, 10, 'a');102 std::size_t M = std::min<std::size_t>(v.size(), 10);103 for (std::size_t i = 0; i < M; ++i)104 assert(v[i] == (s[3 + M - 1 - i] == '1'));105 for (std::size_t i = 10; i < v.size(); ++i)106 assert(v[i] == false);107 }108 {109 std::string_view s("xxxbababababaxxxx");110 std::bitset<N> v(s, 3, 10, 'a', 'b');111 std::size_t M = std::min<std::size_t>(v.size(), 10);112 for (std::size_t i = 0; i < M; ++i)113 assert(v[i] == (s[3 + M - 1 - i] == 'b'));114 for (std::size_t i = 10; i < v.size(); ++i)115 assert(v[i] == false);116 }117}118 119struct Nonsense {120 virtual ~Nonsense() {}121};122 123constexpr void test_for_non_eager_instantiation() {124 // Ensure we don't accidentally instantiate `std::basic_string_view<Nonsense>`125 // since it may not be well formed and can cause an error in the126 // non-immediate context.127 static_assert(!std::is_constructible<std::bitset<3>, Nonsense*>::value, "");128 static_assert(!std::is_constructible<std::bitset<3>, Nonsense*, std::size_t, Nonsense&, Nonsense&>::value, "");129}130 131constexpr bool test() {132 test_string_ctor<0>();133 test_string_ctor<1>();134 test_string_ctor<31>();135 test_string_ctor<32>();136 test_string_ctor<33>();137 test_string_ctor<63>();138 test_string_ctor<64>();139 test_string_ctor<65>();140 test_string_ctor<1000>();141 test_for_non_eager_instantiation();142 143 return true;144}145 146int main(int, char**) {147 test();148 static_assert(test());149 150 return 0;151}152