libstdc++-v3/testsuite/21_strings/basic_string/capacity/char/2.cc

   1 // 1999-05-11 bkoz
   2
   3 // Copyright (C) 1999-2024 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 3, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20 // 21.3.3 string capacity
  21
  22 #include <string>
  23 #include <testsuite_hooks.h>
  24
  25 // libstdc++/4548
  26 // http://gcc.gnu.org/ml/libstdc++/2001-11/msg00150.html
  27 void test02()
  28 {
  29   std::string str01 = "twelve chars";
  30   // str01 becomes shared
  31   std::string str02 = str01;
  32 #if __cplusplus <= 201703L
  33   str01.reserve();
  34 #else
  35   str01.shrink_to_fit(); // reserve is deprecated in C++20
  36 #endif
  37   VERIFY( str01.capacity() >= 12 );
  38 }
  39
  40 int main()
  41 {
  42   test02();
  43   return 0;
  44 }