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 // XFAIL: LIBCXX-AIX-FIXME 10 11 // <string> 12 13 // template<class InputIterator> 14 // basic_string& assign(InputIterator first, InputIterator last); // constexpr since C++20 15 16 #include <string> 17 #include <cassert> 18 19 #include "test_macros.h" 20 #include "test_iterators.h" 21 #include "min_allocator.h" 22 23 template <class S, class It> 24 TEST_CONSTEXPR_CXX20 void 25 test(S s, It first, It last, S expected) 26 { 27 s.assign(first, last); 28 LIBCPP_ASSERT(s.__invariants()); 29 assert(s == expected); 30 } 31 32 #ifndef TEST_HAS_NO_EXCEPTIONS 33 struct Widget { operator char() const { throw 42; } }; 34 35 template <class S, class It> 36 void 37 test_exceptions(S s, It first, It last) 38 { 39 S original = s; 40 typename S::iterator begin = s.begin(); 41 typename S::iterator end = s.end(); 42 43 try { 44 s.assign(first, last); 45 assert(false); 46 } catch (...) {} 47 48 // Part of "no effects" is that iterators and pointers 49 // into the string must not have been invalidated. 50 LIBCPP_ASSERT(s.__invariants()); 51 assert(s == original); 52 assert(s.begin() == begin); 53 assert(s.end() == end); 54 } 55 #endif 56 57 TEST_CONSTEXPR_CXX20 bool test() { 58 { 59 typedef std::string S; 60 const char* s = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"; 61 test(S(), s, s, S()); 62 test(S(), s, s+1, S("A")); 63 test(S(), s, s+10, S("ABCDEFGHIJ")); 64 test(S(), s, s+52, S("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz")); 65 66 test(S("12345"), s, s, S()); 67 test(S("12345"), s, s+1, S("A")); 68 test(S("12345"), s, s+10, S("ABCDEFGHIJ")); 69 test(S("12345"), s, s+52, S("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz")); 70 71 test(S("1234567890"), s, s, S()); 72 test(S("1234567890"), s, s+1, S("A")); 73 test(S("1234567890"), s, s+10, S("ABCDEFGHIJ")); 74 test(S("1234567890"), s, s+52, S("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz")); 75 76 test(S("12345678901234567890"), s, s, S()); 77 test(S("12345678901234567890"), s, s+1, S("A")); 78 test(S("12345678901234567890"), s, s+10, S("ABCDEFGHIJ")); 79 test(S("12345678901234567890"), s, s+52, 80 S("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz")); 81 82 test(S(), cpp17_input_iterator<const char*>(s), cpp17_input_iterator<const char*>(s), S()); 83 test(S(), cpp17_input_iterator<const char*>(s), cpp17_input_iterator<const char*>(s+1), S("A")); 84 test(S(), cpp17_input_iterator<const char*>(s), cpp17_input_iterator<const char*>(s+10), 85 S("ABCDEFGHIJ")); 86 test(S(), cpp17_input_iterator<const char*>(s), cpp17_input_iterator<const char*>(s+52), 87 S("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz")); 88 89 test(S("12345"), cpp17_input_iterator<const char*>(s), cpp17_input_iterator<const char*>(s), 90 S()); 91 test(S("12345"), cpp17_input_iterator<const char*>(s), cpp17_input_iterator<const char*>(s+1), 92 S("A")); 93 test(S("12345"), cpp17_input_iterator<const char*>(s), cpp17_input_iterator<const char*>(s+10), 94 S("ABCDEFGHIJ")); 95 test(S("12345"), cpp17_input_iterator<const char*>(s), cpp17_input_iterator<const char*>(s+52), 96 S("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz")); 97 98 test(S("1234567890"), cpp17_input_iterator<const char*>(s), cpp17_input_iterator<const char*>(s), 99 S()); 100 test(S("1234567890"), cpp17_input_iterator<const char*>(s), cpp17_input_iterator<const char*>(s+1), 101 S("A")); 102 test(S("1234567890"), cpp17_input_iterator<const char*>(s), cpp17_input_iterator<const char*>(s+10), 103 S("ABCDEFGHIJ")); 104 test(S("1234567890"), cpp17_input_iterator<const char*>(s), cpp17_input_iterator<const char*>(s+52), 105 S("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz")); 106 107 test(S("12345678901234567890"), cpp17_input_iterator<const char*>(s), cpp17_input_iterator<const char*>(s), 108 S()); 109 test(S("12345678901234567890"), cpp17_input_iterator<const char*>(s), cpp17_input_iterator<const char*>(s+1), 110 S("A")); 111 test(S("12345678901234567890"), cpp17_input_iterator<const char*>(s), cpp17_input_iterator<const char*>(s+10), 112 S("ABCDEFGHIJ")); 113 test(S("12345678901234567890"), cpp17_input_iterator<const char*>(s), cpp17_input_iterator<const char*>(s+52), 114 S("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz")); 115 } 116 #if TEST_STD_VER >= 11 117 { 118 typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S; 119 const char* s = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"; 120 test(S(), s, s, S()); 121 test(S(), s, s+1, S("A")); 122 test(S(), s, s+10, S("ABCDEFGHIJ")); 123 test(S(), s, s+52, S("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz")); 124 125 test(S("12345"), s, s, S()); 126 test(S("12345"), s, s+1, S("A")); 127 test(S("12345"), s, s+10, S("ABCDEFGHIJ")); 128 test(S("12345"), s, s+52, S("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz")); 129 130 test(S("1234567890"), s, s, S()); 131 test(S("1234567890"), s, s+1, S("A")); 132 test(S("1234567890"), s, s+10, S("ABCDEFGHIJ")); 133 test(S("1234567890"), s, s+52, S("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz")); 134 135 test(S("12345678901234567890"), s, s, S()); 136 test(S("12345678901234567890"), s, s+1, S("A")); 137 test(S("12345678901234567890"), s, s+10, S("ABCDEFGHIJ")); 138 test(S("12345678901234567890"), s, s+52, 139 S("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz")); 140 141 test(S(), cpp17_input_iterator<const char*>(s), cpp17_input_iterator<const char*>(s), S()); 142 test(S(), cpp17_input_iterator<const char*>(s), cpp17_input_iterator<const char*>(s+1), S("A")); 143 test(S(), cpp17_input_iterator<const char*>(s), cpp17_input_iterator<const char*>(s+10), 144 S("ABCDEFGHIJ")); 145 test(S(), cpp17_input_iterator<const char*>(s), cpp17_input_iterator<const char*>(s+52), 146 S("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz")); 147 148 test(S("12345"), cpp17_input_iterator<const char*>(s), cpp17_input_iterator<const char*>(s), 149 S()); 150 test(S("12345"), cpp17_input_iterator<const char*>(s), cpp17_input_iterator<const char*>(s+1), 151 S("A")); 152 test(S("12345"), cpp17_input_iterator<const char*>(s), cpp17_input_iterator<const char*>(s+10), 153 S("ABCDEFGHIJ")); 154 test(S("12345"), cpp17_input_iterator<const char*>(s), cpp17_input_iterator<const char*>(s+52), 155 S("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz")); 156 157 test(S("1234567890"), cpp17_input_iterator<const char*>(s), cpp17_input_iterator<const char*>(s), 158 S()); 159 test(S("1234567890"), cpp17_input_iterator<const char*>(s), cpp17_input_iterator<const char*>(s+1), 160 S("A")); 161 test(S("1234567890"), cpp17_input_iterator<const char*>(s), cpp17_input_iterator<const char*>(s+10), 162 S("ABCDEFGHIJ")); 163 test(S("1234567890"), cpp17_input_iterator<const char*>(s), cpp17_input_iterator<const char*>(s+52), 164 S("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz")); 165 166 test(S("12345678901234567890"), cpp17_input_iterator<const char*>(s), cpp17_input_iterator<const char*>(s), 167 S()); 168 test(S("12345678901234567890"), cpp17_input_iterator<const char*>(s), cpp17_input_iterator<const char*>(s+1), 169 S("A")); 170 test(S("12345678901234567890"), cpp17_input_iterator<const char*>(s), cpp17_input_iterator<const char*>(s+10), 171 S("ABCDEFGHIJ")); 172 test(S("12345678901234567890"), cpp17_input_iterator<const char*>(s), cpp17_input_iterator<const char*>(s+52), 173 S("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz")); 174 } 175 #endif 176 #ifndef TEST_HAS_NO_EXCEPTIONS 177 if (!TEST_IS_CONSTANT_EVALUATED) { // test iterator operations that throw 178 typedef std::string S; 179 typedef ThrowingIterator<char> TIter; 180 typedef cpp17_input_iterator<TIter> IIter; 181 const char* s = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"; 182 test_exceptions(S(), IIter(TIter(s, s+10, 4, TIter::TAIncrement)), IIter(TIter())); 183 test_exceptions(S(), IIter(TIter(s, s+10, 5, TIter::TADereference)), IIter(TIter())); 184 test_exceptions(S(), IIter(TIter(s, s+10, 6, TIter::TAComparison)), IIter(TIter())); 185 186 test_exceptions(S(), TIter(s, s+10, 4, TIter::TAIncrement), TIter()); 187 test_exceptions(S(), TIter(s, s+10, 5, TIter::TADereference), TIter()); 188 test_exceptions(S(), TIter(s, s+10, 6, TIter::TAComparison), TIter()); 189 190 Widget w[100]; 191 test_exceptions(S(), w, w+100); 192 } 193 #endif 194 195 { // test assigning to self 196 typedef std::string S; 197 S s_short = "123/"; 198 S s_long = "Lorem ipsum dolor sit amet, consectetur/"; 199 200 s_short.assign(s_short.begin(), s_short.end()); 201 assert(s_short == "123/"); 202 s_short.assign(s_short.begin() + 2, s_short.end()); 203 assert(s_short == "3/"); 204 205 s_long.assign(s_long.begin(), s_long.end()); 206 assert(s_long == "Lorem ipsum dolor sit amet, consectetur/"); 207 208 s_long.assign(s_long.begin() + 30, s_long.end()); 209 assert(s_long == "nsectetur/"); 210 } 211 212 { // test assigning a different type 213 typedef std::string S; 214 const uint8_t p[] = "ABCD"; 215 216 S s; 217 s.assign(p, p + 4); 218 assert(s == "ABCD"); 219 } 220 221 { // regression-test assigning to self in sneaky ways 222 std::string sneaky = "hello"; 223 sneaky.resize(sneaky.capacity(), 'x'); 224 std::string expected = sneaky + std::string(1, '\0'); 225 test(sneaky, sneaky.data(), sneaky.data() + sneaky.size() + 1, expected); 226 } 227 228 return true; 229 } 230 231 int main(int, char**) 232 { 233 test(); 234 #if TEST_STD_VER > 17 235 static_assert(test()); 236 #endif 237 238 return 0; 239 } 240