libstdc++-v3/testsuite/27_io/basic_istream/3.cc

   1 // 1999-01-17 bkoz test functionality of basic_filebuf for char_type == char
   2
   3 // Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003
   4 // 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 2, 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 COPYING.  If not, write to the Free
  19 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  20 // USA.
  21
  22 // 27.8.1.1 - Template class basic_filebuf
  23 // NB: This file is for testing basic_filebuf with NO OTHER INCLUDES.
  24
  25 #include <istream>
  26 #include <testsuite_hooks.h>
  27
  28 // { dg-do compile }
  29
  30 // libstdc++/2020
  31 // should be able to use custom char_type, custom traits type
  32 class gnu_char_type
  33 {
  34   unsigned long character;
  35 public:
  36   // operator ==
  37   bool
  38   operator==(const gnu_char_type& __lhs)
  39   { return character == __lhs.character; }
  40
  41   // operator <
  42   bool
  43   operator<(const gnu_char_type& __lhs)
  44   { return character < __lhs.character; }
  45
  46   // default ctor
  47   gnu_char_type() { }
  48
  49   // to_char_type
  50   gnu_char_type(const unsigned long& __l) : character(__l) { }
  51
  52   // to_int_type
  53   operator unsigned long() const { return character; }
  54 };
  55
  56 // char_traits specialization
  57 struct gnu_char_traits
  58 {
  59   typedef gnu_char_type char_type;
  60   typedef long                  int_type;
  61   typedef long          pos_type;
  62   typedef unsigned long         off_type;
  63   typedef long                  state_type;
  64
  65   static void
  66   assign(char_type& __c1, const char_type& __c2) { }
  67
  68   static bool
  69   eq(const char_type& __c1, const char_type& __c2) { return true; }
  70
  71   static bool
  72   lt(const char_type& __c1, const char_type& __c2) { return true; }
  73
  74   static int
  75   compare(const char_type* __s1, const char_type* __s2, size_t __n)
  76   { return 0; }
  77
  78   static size_t
  79   length(const char_type* __s) { return 0; }
  80
  81   static const char_type*
  82   find(const char_type* __s, size_t __n, const char_type& __a)
  83   { return __s; }
  84
  85   static char_type*
  86   move(char_type* __s1, const char_type* __s2, size_t __n)
  87   { return __s1; }
  88
  89   static char_type*
  90   copy(char_type* __s1, const char_type* __s2, size_t __n)
  91   { return __s1; }
  92
  93   static char_type*
  94   assign(char_type* __s, size_t __n, char_type __a)
  95   { return __s; }
  96
  97   static char_type
  98   to_char_type(const int_type& __c)
  99   { return char_type(); }
 100
 101   static int_type
 102   to_int_type(const char_type& __c)
 103   { return int_type(); }
 104
 105   static bool
 106   eq_int_type(const int_type& __c1, const int_type& __c2)
 107   { return true; }
 108
 109   static int_type
 110   eof()
 111   { return int_type(); }
 112
 113   static int_type
 114   not_eof(const int_type& __c)
 115   { return int_type(); }
 116 };
 117
 118 void test07()
 119 {
 120   bool test __attribute__((unused)) = true;
 121   typedef std::basic_istream<gnu_char_type, gnu_char_traits> gnu_istr;
 122
 123   try
 124     { gnu_istr obj(NULL); }
 125   catch(std::exception& obj)
 126     {
 127       test = false;
 128       VERIFY( test );
 129     }
 130 }
 131
 132 int main()
 133 {
 134   test07();
 135   return 0;
 136 }
 137
 138
 139
 140 // more surf!!!