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 // <string> 10 11 // size_type copy(charT* s, size_type n, size_type pos = 0) const; // constexpr since C++20 12 13 #include <string> 14 #include <stdexcept> 15 #include <algorithm> 16 #include <cassert> 17 18 #include "test_macros.h" 19 #include "min_allocator.h" 20 21 template <class S> 22 TEST_CONSTEXPR_CXX20 void test(S str, typename S::value_type* s, typename S::size_type n, typename S::size_type pos) { 23 const S& cs = str; 24 if (pos <= cs.size()) { 25 typename S::size_type r = cs.copy(s, n, pos); 26 typename S::size_type rlen = std::min(n, cs.size() - pos); 27 assert(r == rlen); 28 for (r = 0; r < rlen; ++r) 29 assert(S::traits_type::eq(cs[pos + r], s[r])); 30 } 31 #ifndef TEST_HAS_NO_EXCEPTIONS 32 else if (!TEST_IS_CONSTANT_EVALUATED) { 33 try { 34 typename S::size_type r = cs.copy(s, n, pos); 35 ((void)r); // Prevent unused warning 36 assert(false); 37 } catch (std::out_of_range&) { 38 assert(pos > str.size()); 39 } 40 } 41 #endif 42 } 43 44 template <class S> 45 TEST_CONSTEXPR_CXX20 void test_string() { 46 char s[50]; 47 test(S(""), s, 0, 0); 48 test(S(""), s, 0, 1); 49 test(S(""), s, 1, 0); 50 test(S("abcde"), s, 0, 0); 51 test(S("abcde"), s, 0, 1); 52 test(S("abcde"), s, 0, 2); 53 test(S("abcde"), s, 0, 4); 54 test(S("abcde"), s, 0, 5); 55 test(S("abcde"), s, 0, 6); 56 test(S("abcde"), s, 1, 0); 57 test(S("abcde"), s, 1, 1); 58 test(S("abcde"), s, 1, 2); 59 test(S("abcde"), s, 1, 4); 60 test(S("abcde"), s, 1, 5); 61 test(S("abcde"), s, 2, 0); 62 test(S("abcde"), s, 2, 1); 63 test(S("abcde"), s, 2, 2); 64 test(S("abcde"), s, 2, 4); 65 test(S("abcde"), s, 4, 0); 66 test(S("abcde"), s, 4, 1); 67 test(S("abcde"), s, 4, 2); 68 test(S("abcde"), s, 5, 0); 69 test(S("abcde"), s, 5, 1); 70 test(S("abcde"), s, 6, 0); 71 test(S("abcdefghijklmnopqrst"), s, 0, 0); 72 test(S("abcdefghijklmnopqrst"), s, 0, 1); 73 test(S("abcdefghijklmnopqrst"), s, 0, 2); 74 test(S("abcdefghijklmnopqrst"), s, 0, 10); 75 test(S("abcdefghijklmnopqrst"), s, 0, 19); 76 test(S("abcdefghijklmnopqrst"), s, 0, 20); 77 test(S("abcdefghijklmnopqrst"), s, 0, 21); 78 test(S("abcdefghijklmnopqrst"), s, 1, 0); 79 test(S("abcdefghijklmnopqrst"), s, 1, 1); 80 test(S("abcdefghijklmnopqrst"), s, 1, 2); 81 test(S("abcdefghijklmnopqrst"), s, 1, 9); 82 test(S("abcdefghijklmnopqrst"), s, 1, 18); 83 test(S("abcdefghijklmnopqrst"), s, 1, 19); 84 test(S("abcdefghijklmnopqrst"), s, 1, 20); 85 test(S("abcdefghijklmnopqrst"), s, 2, 0); 86 test(S("abcdefghijklmnopqrst"), s, 2, 1); 87 test(S("abcdefghijklmnopqrst"), s, 2, 2); 88 test(S("abcdefghijklmnopqrst"), s, 2, 9); 89 test(S("abcdefghijklmnopqrst"), s, 2, 17); 90 test(S("abcdefghijklmnopqrst"), s, 2, 18); 91 test(S("abcdefghijklmnopqrst"), s, 2, 19); 92 test(S("abcdefghijklmnopqrst"), s, 10, 0); 93 test(S("abcdefghijklmnopqrst"), s, 10, 1); 94 test(S("abcdefghijklmnopqrst"), s, 10, 2); 95 test(S("abcdefghijklmnopqrst"), s, 10, 5); 96 test(S("abcdefghijklmnopqrst"), s, 10, 9); 97 test(S("abcdefghijklmnopqrst"), s, 10, 10); 98 test(S("abcdefghijklmnopqrst"), s, 10, 11); 99 test(S("abcdefghijklmnopqrst"), s, 19, 0); 100 test(S("abcdefghijklmnopqrst"), s, 19, 1); 101 test(S("abcdefghijklmnopqrst"), s, 19, 2); 102 test(S("abcdefghijklmnopqrst"), s, 20, 0); 103 test(S("abcdefghijklmnopqrst"), s, 20, 1); 104 test(S("abcdefghijklmnopqrst"), s, 21, 0); 105 test(S("abcdefghijklmnopqrstabcdefghijklmnopqrst"), s, 40, 1); 106 test(S("abcdefghijklmnopqrstabcdefghijklmnopqrst"), s, 40, 0); 107 } 108 109 TEST_CONSTEXPR_CXX20 bool test() { 110 test_string<std::string>(); 111 #if TEST_STD_VER >= 11 112 test_string<std::basic_string<char, std::char_traits<char>, min_allocator<char>>>(); 113 #endif 114 115 return true; 116 } 117 118 int main(int, char**) { 119 test(); 120 #if TEST_STD_VER > 17 121 static_assert(test()); 122 #endif 123 124 return 0; 125 } 126