libstdc++-v3/testsuite/23_containers/vector/ext_pointer/resize.cc

   1
   2 // Copyright (C) 2008-2021 Free Software Foundation, Inc.
   3 //
   4 // This file is part of the GNU ISO C++ Library.  This library is free
   5 // software; you can redistribute it and/or modify it under the
   6 // terms of the GNU General Public License as published by the
   7 // Free Software Foundation; either version 3, or (at your option)
   8 // any later version.
   9
  10 // This library is distributed in the hope that it will be useful,
  11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 // GNU General Public License for more details.
  14
  15 // You should have received a copy of the GNU General Public License along
  16 // with this library; see the file COPYING3.  If not see
  17 // <http://www.gnu.org/licenses/>.
  18
  19
  20 #include <vector>
  21 #include <stdexcept>
  22 #include <testsuite_allocator.h>
  23 #include <testsuite_hooks.h>
  24 #include <ext/extptr_allocator.h>
  25
  26
  27 void test01()
  28 {
  29   // non POD types
  30   std::vector<int, __gnu_cxx::_ExtPtr_allocator<int> > vec01;
  31   typedef std::vector<int, __gnu_cxx::_ExtPtr_allocator<int> >::size_type size_type;
  32
  33   VERIFY(vec01.empty());
  34
  35   const int A[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
  36
  37   // Test resize of the vector based on reserve
  38   size_type sz01 = vec01.capacity();
  39   vec01.reserve(100);
  40   size_type sz02 = vec01.capacity();
  41   VERIFY(sz02 >= sz01);
  42
  43   // grow/shrink
  44   vec01.assign( A, A+10 );
  45   sz01 = vec01.size() + 100;
  46   vec01.resize(sz01);
  47   sz02 = vec01.size();
  48   VERIFY(sz01 == sz02);
  49   VERIFY(std::equal(vec01.begin(), vec01.begin()+10, A));
  50
  51   sz01 = vec01.size() - 100;
  52   vec01.resize(sz01);
  53   sz02 = vec01.size();
  54   VERIFY(sz01 == sz02);
  55   VERIFY(std::equal(vec01.begin(), vec01.end(), A));
  56 }
  57
  58 int main()
  59 {
  60   test01();
  61   return 0;
  62 }