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

   1 // 1999-05-11 bkoz
   2
   3 // Copyright (C) 1999-2015 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::string str01;
  30   typedef std::string::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 #if _GLIBCXX_USE_CXX11_ABI
  40   VERIFY( sz01 < 100);
  41 #else
  42   VERIFY( sz01 == 0 );
  43 #endif
  44
  45   sz01 = str01.size() + 5;
  46   str01.resize(sz01);
  47   sz02 = str01.size();
  48   VERIFY( sz01 == sz02 );
  49
  50   sz01 = str01.size() - 5;
  51   str01.resize(sz01);
  52   sz02 = str01.size();
  53   VERIFY( sz01 == sz02 );
  54
  55   std::string str05(30, 'q');
  56   std::string str06 = str05;
  57   str05 = str06 + str05;
  58   VERIFY( str05.capacity() >= str05.size() );
  59   VERIFY( str06.capacity() >= str06.size() );
  60
  61   // POD types: size, length, max_size, clear(), empty()
  62   bool b01;
  63   std::string str011;
  64   b01 = str01.empty();
  65   VERIFY( b01 == true );
  66   sz01 = str01.size();
  67   sz02 = str01.length();
  68   VERIFY( sz01 == sz02 );
  69   str01.c_str();
  70   sz01 = str01.size();
  71   sz02 = str01.length();
  72   VERIFY( sz01 == sz02 );
  73
  74   sz01 = str01.length();
  75   str01.c_str();
  76   str011 = str01 +  "_addendum_";
  77   str01.c_str();
  78   sz02 = str01.length();
  79   VERIFY( sz01 == sz02 );
  80   sz02 = str011.length();
  81   VERIFY( sz02 > sz01 );
  82
  83   // trickster allocator issues involved with these:
  84   std::string str3 = "8-chars_8-chars_";
  85   std::string str4 = str3 + "7-chars";
  86
  87   sz01 = str01.size();
  88   sz02 = str01.max_size();
  89   VERIFY( sz02 >= sz01 );
  90
  91   sz01 = str01.size();
  92   str01.clear();
  93   b01 = str01.empty();
  94   VERIFY( b01 == true );
  95   sz02 = str01.size();
  96   VERIFY( sz01 >= sz02 );
  97 }
  98
  99 int main()
 100 {
 101   test01();
 102   return 0;
 103 }