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 // basic_string<charT,traits,Allocator>& assign(const charT* s); 12 13 #include <string> 14 #include <stdexcept> 15 #include <cassert> 16 17 #include "test_macros.h" 18 #include "min_allocator.h" 19 20 template <class S> 21 TEST_CONSTEXPR_CXX20 void 22 test(S s, const typename S::value_type* str, S expected) 23 { 24 s.assign(str); 25 LIBCPP_ASSERT(s.__invariants()); 26 assert(s == expected); 27 } 28 29 bool test() { 30 { 31 typedef std::string S; 32 test(S(), "", S()); 33 test(S(), "12345", S("12345")); 34 test(S(), "12345678901234567890", S("12345678901234567890")); 35 36 test(S("12345"), "", S()); 37 test(S("12345"), "12345", S("12345")); 38 test(S("12345"), "1234567890", S("1234567890")); 39 40 test(S("12345678901234567890"), "", S()); 41 test(S("12345678901234567890"), "12345", S("12345")); 42 test(S("12345678901234567890"), "12345678901234567890", 43 S("12345678901234567890")); 44 } 45 #if TEST_STD_VER >= 11 46 { 47 typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S; 48 test(S(), "", S()); 49 test(S(), "12345", S("12345")); 50 test(S(), "12345678901234567890", S("12345678901234567890")); 51 52 test(S("12345"), "", S()); 53 test(S("12345"), "12345", S("12345")); 54 test(S("12345"), "1234567890", S("1234567890")); 55 56 test(S("12345678901234567890"), "", S()); 57 test(S("12345678901234567890"), "12345", S("12345")); 58 test(S("12345678901234567890"), "12345678901234567890", 59 S("12345678901234567890")); 60 } 61 #endif 62 63 { // test assignment to self 64 typedef std::string S; 65 S s_short = "123/"; 66 S s_long = "Lorem ipsum dolor sit amet, consectetur/"; 67 68 s_short.assign(s_short.c_str()); 69 assert(s_short == "123/"); 70 s_short.assign(s_short.c_str() + 2); 71 assert(s_short == "3/"); 72 73 s_long.assign(s_long.c_str() + 30); 74 assert(s_long == "nsectetur/"); 75 } 76 77 return true; 78 } 79 80 int main(int, char**) 81 { 82 test(); 83 #if TEST_STD_VER > 17 84 // static_assert(test()); 85 #endif 86 87 return 0; 88 } 89