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 // const_reference at(size_type pos) const; 12 // reference at(size_type pos); 13 14 // When back-deploying to macosx10.7, the RTTI for exception classes 15 // incorrectly provided by libc++.dylib is mixed with the one in 16 // libc++abi.dylib and exceptions are not caught properly. 17 // XFAIL: with_system_cxx_lib=macosx10.7 18 19 #include <string> 20 #include <stdexcept> 21 #include <cassert> 22 23 #include "min_allocator.h" 24 25 #include "test_macros.h" 26 27 template <class S> 28 void 29 test(S s, typename S::size_type pos) 30 { 31 const S& cs = s; 32 if (pos < s.size()) 33 { 34 assert(s.at(pos) == s[pos]); 35 assert(cs.at(pos) == cs[pos]); 36 } 37 #ifndef TEST_HAS_NO_EXCEPTIONS 38 else 39 { 40 try 41 { 42 TEST_IGNORE_NODISCARD s.at(pos); 43 assert(false); 44 } 45 catch (std::out_of_range&) 46 { 47 assert(pos >= s.size()); 48 } 49 try 50 { 51 TEST_IGNORE_NODISCARD cs.at(pos); 52 assert(false); 53 } 54 catch (std::out_of_range&) 55 { 56 assert(pos >= s.size()); 57 } 58 } 59 #endif 60 } 61 62 int main(int, char**) 63 { 64 { 65 typedef std::string S; 66 test(S(), 0); 67 test(S("123"), 0); 68 test(S("123"), 1); 69 test(S("123"), 2); 70 test(S("123"), 3); 71 } 72 #if TEST_STD_VER >= 11 73 { 74 typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S; 75 test(S(), 0); 76 test(S("123"), 0); 77 test(S("123"), 1); 78 test(S("123"), 2); 79 test(S("123"), 3); 80 } 81 #endif 82 83 return 0; 84 } 85