old-autovect-branch/libstdc++-v3/testsuite/21_strings/basic_string/capacity/wchar_t/18654.cc

   1 // 2004-11-29  Paolo Carlini  <pcarlini@suse.de>
   2
   3 // Copyright (C) 2004 Free Software Foundation
   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 2, 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 COPYING.  If not, write to the Free
  18 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  19 // USA.
  20
  21 // 21.3.3 string capacity
  22
  23 #include <string>
  24 #include <testsuite_hooks.h>
  25
  26 // libstdc++/18654
  27 void test01()
  28 {
  29   using namespace std;
  30   bool test __attribute__((unused)) = true;
  31
  32   typedef wstring::size_type size_type;
  33
  34   // Our current implementation provides exact shrink-to-size
  35   // and shrink-to-fit (in the future, maybe this will change
  36   // for short strings).
  37   const size_type minsize = 2 << 0;
  38   const size_type maxsize = 2 << 20;
  39   for (size_type i = minsize; i <= maxsize; i *= 2)
  40     {
  41       wstring str(i, L'x');
  42       str.reserve(3 * i);
  43
  44       str.reserve(2 * i);
  45       VERIFY( str.capacity() == 2 * i );
  46
  47       str.reserve();
  48       VERIFY( str.capacity() == i );
  49     }
  50 }
  51
  52 int main()
  53 {
  54   test01();
  55   return 0;
  56 }