libstdc++-v3/testsuite/23_containers/vector/capacity/1.cc

   1 // 1999-05-07
   2 // bkoz
   3
   4 // Copyright (C) 1999-2016 Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 3, or (at your option)
  10 // any later version.
  11
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16
  17 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING3.  If not see
  19 // <http://www.gnu.org/licenses/>.
  20
  21 // 23.2.4.2 vector capacity
  22
  23 #include <vector>
  24 #include <stdexcept>
  25 #include <testsuite_allocator.h>
  26 #include <testsuite_hooks.h>
  27
  28 template<typename T>
  29   struct A { };
  30
  31 struct B { };
  32
  33 void test01()
  34 {
  35   // non POD types
  36   bool test __attribute__((unused)) = true;
  37   std::vector< A<B> > vec01;
  38   typedef std::vector< A<B> >::size_type size_type;
  39
  40   size_type sz01 = vec01.capacity();
  41   vec01.reserve(100);
  42   size_type sz02 = vec01.capacity();
  43   VERIFY( sz02 >= sz01 );
  44
  45   sz01 = vec01.size() + 5;
  46   vec01.resize(sz01);
  47   sz02 = vec01.size();
  48   VERIFY( sz01 == sz02 );
  49
  50   sz01 = vec01.size() - 5;
  51   vec01.resize(sz01);
  52   sz02 = vec01.size();
  53   VERIFY( sz01 == sz02 );
  54 }
  55
  56 int main()
  57 {
  58   test01();
  59   return 0;
  60 }