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 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 int main() 30 { 31 { 32 typedef std::string S; 33 test(S(), "", S()); 34 test(S(), "12345", S("12345")); 35 test(S(), "12345678901234567890", S("12345678901234567890")); 36 37 test(S("12345"), "", S()); 38 test(S("12345"), "12345", S("12345")); 39 test(S("12345"), "1234567890", S("1234567890")); 40 41 test(S("12345678901234567890"), "", S()); 42 test(S("12345678901234567890"), "12345", S("12345")); 43 test(S("12345678901234567890"), "12345678901234567890", 44 S("12345678901234567890")); 45 } 46 #if TEST_STD_VER >= 11 47 { 48 typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S; 49 test(S(), "", S()); 50 test(S(), "12345", S("12345")); 51 test(S(), "12345678901234567890", S("12345678901234567890")); 52 53 test(S("12345"), "", S()); 54 test(S("12345"), "12345", S("12345")); 55 test(S("12345"), "1234567890", S("1234567890")); 56 57 test(S("12345678901234567890"), "", S()); 58 test(S("12345678901234567890"), "12345", S("12345")); 59 test(S("12345678901234567890"), "12345678901234567890", 60 S("12345678901234567890")); 61 } 62 #endif 63 64 { // test assignment to self 65 typedef std::string S; 66 S s_short = "123/"; 67 S s_long = "Lorem ipsum dolor sit amet, consectetur/"; 68 69 s_short.assign(s_short.c_str()); 70 assert(s_short == "123/"); 71 s_short.assign(s_short.c_str() + 2); 72 assert(s_short == "3/"); 73 74 s_long.assign(s_long.c_str() + 30); 75 assert(s_long == "nsectetur/"); 76 } 77 } 78