libcxx/test/std/strings/basic.string/string.capacity/over_max_size.pass.cpp

   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 // UNSUPPORTED: no-exceptions
  10 // XFAIL: stdlib=apple-libc++ && target={{.+}}-apple-macosx10.{{9|10|11}}
  11
  12 // Prior to http://llvm.org/D123580, there was a bug with how the max_size()
  13 // was calculated. That was inlined into some functions in the dylib, which leads
  14 // to failures when running this test against an older system dylib.
  15 // XFAIL: stdlib=apple-libc++ && target=arm64-apple-macosx{{11.0|12.0}}
  16
  17 // <string>
  18
  19 // size_type max_size() const; // constexpr since C++20
  20
  21 #include <string>
  22 #include <cassert>
  23 #include <stdexcept>
  24
  25 #include "test_macros.h"
  26 #include "min_allocator.h"
  27
  28 template <class S>
  29 void test(const S& s) {
  30   assert(s.max_size() >= s.size());
  31   S s2(s);
  32   const std::size_t sz = s2.max_size() + 1;
  33   try {
  34     s2.resize(sz, 'x');
  35   } catch (const std::length_error&) {
  36     return;
  37   }
  38   assert(false);
  39 }
  40
  41 template <class S>
  42 void test_string() {
  43   test(S());
  44   test(S("123"));
  45   test(S("12345678901234567890123456789012345678901234567890"));
  46 }
  47
  48 bool test() {
  49   test_string<std::string>();
  50 #if TEST_STD_VER >= 11
  51   test_string<std::basic_string<char, std::char_traits<char>, min_allocator<char>>>();
  52 #endif
  53
  54   return true;
  55 }
  56
  57 int main(int, char**) {
  58   test();
  59
  60   return 0;
  61 }