libstdc++-v3/testsuite/21_strings/basic_string/element_access/wchar_t/2.cc

   1 // 1999-06-08 bkoz
   2
   3 // Copyright (C) 1999, 2003 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 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  19 // USA.
  20
  21 // 21.3 template class basic_string
  22
  23 #include <string>
  24 #include <stdexcept>
  25 #include <testsuite_hooks.h>
  26
  27 // Do a quick sanity check on known problems with element access and
  28 // ref-counted strings. These should all pass, regardless of the
  29 // underlying string implementation, of course.
  30 bool test01(void)
  31 {
  32   bool test = true;
  33   typedef std::wstring::size_type csize_type;
  34   typedef std::wstring::iterator siterator;
  35   typedef std::wstring::reverse_iterator sriterator;
  36   csize_type npos = std::wstring::npos;
  37   csize_type csz01, csz02;
  38   siterator it1;
  39   sriterator rit1;
  40
  41   std::wstring str01(L"montara beach, half moon bay");
  42   const std::wstring str02(L"ocean beach, san francisco");
  43   std::wstring str03;
  44
  45   // 21.3 p 5
  46
  47   // References, pointers, and iterators referring to the elements of
  48   // a basic_string may be invalidated by the following uses of that
  49   // basic_string object:
  50
  51   // ...
  52
  53   // Susequent to any of the above uses except the forms of insert()
  54   // and erase() which return iterators, the first call to non-const
  55   // member functions operator[](), at(), begin(), rbegin(), end(), or
  56   // rend()
  57
  58   str03 = str01;
  59   it1 = str01.begin();
  60   *it1 = L'x';
  61   VERIFY( str01[0] == L'x' );
  62   VERIFY( str03[0] == L'm' );
  63
  64   str03 = str01;
  65   csz01 = str01.size();
  66   rit1 = str01.rbegin(); // NB: Pointing at one-past the end, so ...
  67   *rit1 = L'z';          // ... but it's taken care of here
  68   VERIFY( str01[csz01 - 1] == L'z' );
  69   VERIFY( str03[csz01 - 1] == L'y' );
  70
  71   str03 = str01;
  72   csz01 = str01.size();
  73   std::wstring::reference r1 = str01.at(csz01 - 2);
  74   VERIFY( str03 == str01 );
  75   r1 = L'd';
  76   VERIFY( str01[csz01 - 2] == L'd' );
  77   VERIFY( str03[csz01 - 2] == L'a' );
  78
  79   str03 = str01;
  80   csz01 = str01.size();
  81   std::wstring::reference r2 = str01[csz01 - 3];
  82   VERIFY( str03 == str01 );
  83   r2 = L'w';
  84   VERIFY( str01[csz01 - 3] == L'w' );
  85   VERIFY( str03[csz01 - 3] == L'b' );
  86
  87   str03 = str01;
  88   csz02 = str01.size();
  89   it1 = str01.end();
  90   VERIFY( str03 == str01 );
  91   --it1;
  92   *it1 = L'q';
  93   VERIFY( str01[csz02 - 1] == L'q' );
  94   VERIFY( str03[csz02 - 1] == L'z' );
  95
  96   str03 = str01;
  97   rit1 = str01.rend();
  98   VERIFY( str03 == str01 );
  99   --rit1;
 100   *rit1 = L'p';
 101   VERIFY( str01[0] == L'p' );
 102   VERIFY( str03[0] == L'x' );
 103
 104   // need to also test for const begin/const end
 105 #ifdef DEBUG_ASSERT
 106   assert(test);
 107 #endif
 108   return test;
 109 }
 110
 111 int main()
 112 {
 113   test01();
 114   return 0;
 115 }