libstdc++-v3/testsuite/21_strings/basic_string/capacity/wchar_t/1.cc

   1 // 1999-05-11 bkoz
   2
   3 // Copyright (C) 1999-2014 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 void test01()
  26 {
  27   // POD types : resize, capacity, reserve
  28   bool test __attribute__((unused)) = true;
  29   std::wstring str01;
  30   typedef std::wstring::size_type size_type_s;
  31
  32   size_type_s sz01 = str01.capacity();
  33   str01.reserve(100);
  34   size_type_s sz02 = str01.capacity();
  35   VERIFY( sz02 >= sz01 );
  36   VERIFY( sz02 >= 100 );
  37   str01.reserve();
  38   sz01 = str01.capacity();
  39   VERIFY( sz01 == 0 );
  40
  41   sz01 = str01.size() + 5;
  42   str01.resize(sz01);
  43   sz02 = str01.size();
  44   VERIFY( sz01 == sz02 );
  45
  46   sz01 = str01.size() - 5;
  47   str01.resize(sz01);
  48   sz02 = str01.size();
  49   VERIFY( sz01 == sz02 );
  50
  51   std::wstring str05(30, L'q');
  52   std::wstring str06 = str05;
  53   str05 = str06 + str05;
  54   VERIFY( str05.capacity() >= str05.size() );
  55   VERIFY( str06.capacity() >= str06.size() );
  56
  57   // POD types: size, length, max_size, clear(), empty()
  58   bool b01;
  59   std::wstring str011;
  60   b01 = str01.empty();
  61   VERIFY( b01 == true );
  62   sz01 = str01.size();
  63   sz02 = str01.length();
  64   VERIFY( sz01 == sz02 );
  65   str01.c_str();
  66   sz01 = str01.size();
  67   sz02 = str01.length();
  68   VERIFY( sz01 == sz02 );
  69
  70   sz01 = str01.length();
  71   str01.c_str();
  72   str011 = str01 +  L"_addendum_";
  73   str01.c_str();
  74   sz02 = str01.length();
  75   VERIFY( sz01 == sz02 );
  76   sz02 = str011.length();
  77   VERIFY( sz02 > sz01 );
  78
  79   // trickster allocator issues involved with these:
  80   std::wstring str3 = L"8-chars_8-chars_";
  81   std::wstring str4 = str3 + L"7-chars";
  82
  83   sz01 = str01.size();
  84   sz02 = str01.max_size();
  85   VERIFY( sz02 >= sz01 );
  86
  87   sz01 = str01.size();
  88   str01.clear();
  89   b01 = str01.empty();
  90   VERIFY( b01 == true );
  91   sz02 = str01.size();
  92   VERIFY( sz01 >= sz02 );
  93 }
  94
  95 int main()
  96 {
  97   test01();
  98   return 0;
  99 }