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 // void resize(size_type n); 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, typename S::size_type n, S expected) 23 { 24 if (n <= s.max_size()) 25 { 26 s.resize(n); 27 LIBCPP_ASSERT(s.__invariants()); 28 assert(s == expected); 29 } 30 #ifndef TEST_HAS_NO_EXCEPTIONS 31 else 32 { 33 try 34 { 35 s.resize(n); 36 assert(false); 37 } 38 catch (std::length_error&) 39 { 40 assert(n > s.max_size()); 41 } 42 } 43 #endif 44 } 45 46 int main(int, char**) 47 { 48 { 49 typedef std::string S; 50 test(S(), 0, S()); 51 test(S(), 1, S(1, '\0')); 52 test(S(), 10, S(10, '\0')); 53 test(S(), 100, S(100, '\0')); 54 test(S("12345"), 0, S()); 55 test(S("12345"), 2, S("12")); 56 test(S("12345"), 5, S("12345")); 57 test(S("12345"), 15, S("12345\0\0\0\0\0\0\0\0\0\0", 15)); 58 test(S("12345678901234567890123456789012345678901234567890"), 0, S()); 59 test(S("12345678901234567890123456789012345678901234567890"), 10, 60 S("1234567890")); 61 test(S("12345678901234567890123456789012345678901234567890"), 50, 62 S("12345678901234567890123456789012345678901234567890")); 63 test(S("12345678901234567890123456789012345678901234567890"), 60, 64 S("12345678901234567890123456789012345678901234567890\0\0\0\0\0\0\0\0\0\0", 60)); 65 test(S(), S::npos, S("not going to happen")); 66 } 67 #if TEST_STD_VER >= 11 68 { 69 typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S; 70 test(S(), 0, S()); 71 test(S(), 1, S(1, '\0')); 72 test(S(), 10, S(10, '\0')); 73 test(S(), 100, S(100, '\0')); 74 test(S("12345"), 0, S()); 75 test(S("12345"), 2, S("12")); 76 test(S("12345"), 5, S("12345")); 77 test(S("12345"), 15, S("12345\0\0\0\0\0\0\0\0\0\0", 15)); 78 test(S("12345678901234567890123456789012345678901234567890"), 0, S()); 79 test(S("12345678901234567890123456789012345678901234567890"), 10, 80 S("1234567890")); 81 test(S("12345678901234567890123456789012345678901234567890"), 50, 82 S("12345678901234567890123456789012345678901234567890")); 83 test(S("12345678901234567890123456789012345678901234567890"), 60, 84 S("12345678901234567890123456789012345678901234567890\0\0\0\0\0\0\0\0\0\0", 60)); 85 test(S(), S::npos, S("not going to happen")); 86 } 87 #endif 88 89 return 0; 90 } 91