1  /* Test for case handling in regex.
       2     Copyright (C) 2001-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library; if not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #include <sys/types.h>
      20  #include <regex.h>
      21  #include <stdio.h>
      22  #include <stdlib.h>
      23  
      24  
      25  int
      26  main (void)
      27  {
      28    regex_t re;
      29    int n;
      30  
      31    n = regcomp (&re, "[a-bA-B]", REG_ICASE);
      32    if (n != 0)
      33      {
      34        char buf[500];
      35        regerror (n, &re, buf, sizeof (buf));
      36        printf ("regcomp failed: %s\n", buf);
      37        exit (1);
      38      }
      39  
      40    regfree (&re);
      41  
      42    return 0;
      43  }