libstdc++-v3/testsuite/21_strings/basic_string/operations/compare/char/2.cc

   1 // { dg-options "-std=gnu++17" }
   2
   3 // Copyright (C) 2016 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 // [string::compare]
  21
  22 #include <string>
  23 #include <testsuite_hooks.h>
  24
  25 void
  26 test03()
  27 {
  28   bool test __attribute__((unused)) = true;
  29   std::string_view str1("foobar");
  30   std::string str2("foobar");
  31
  32   auto x = str2.compare(str1);
  33   VERIFY (x == 0);
  34
  35   str1 = "bar";
  36   x = str2.compare(str1);
  37   VERIFY (x > 0);
  38
  39   str1 = "foobar";
  40   str2 = "bar";
  41   x = str2.compare(str1);
  42   VERIFY (x < 0);
  43   x = str2.compare(0, 3, str1, 3, 3);
  44   VERIFY (x == 0);
  45
  46   str1 = "bar";
  47   str2 = "foobar";
  48   x = str2.compare(3, 3, str1);
  49   VERIFY (x == 0);
  50 }
  51
  52 // PR libstdc++/77264
  53 void
  54 test04()
  55 {
  56   bool test __attribute__((unused)) = true;
  57
  58   const std::string str("a");
  59   char c = 'a';
  60   int res = str.compare(0, 1, &c, 1);
  61   VERIFY ( !res );
  62
  63   char arr[] = "a";
  64   res = str.compare(0, 1, arr, 1);
  65   VERIFY ( !res );
  66
  67   const char carr[] = "a";
  68   res = str.compare(0, 1, carr, 1);
  69   VERIFY ( !res );
  70
  71   struct S {
  72     operator char*() { return &c; }
  73     operator std::string_view() { return "!"; }
  74     char c = 'a';
  75   };
  76
  77   res = str.compare(0, 1, S{}, 1);
  78   VERIFY ( !res );
  79 }
  80
  81 int main()
  82 {
  83   test03();
  84   test04();
  85   return 0;
  86 }