tests/pcre-wx-backref

   1 #! /bin/sh
   2 # Before grep-2.19, grep -P and -w/-x would not work with a back-reference.
   3 #
   4 # Copyright (C) 2014-2025 Free Software Foundation, Inc.
   5 #
   6 # Copying and distribution of this file, with or without modification,
   7 # are permitted in any medium without royalty provided the copyright
   8 # notice and this notice are preserved.
   9
  10 . "${srcdir=.}/init.sh"; path_prepend_ ../src
  11 require_pcre_
  12
  13 echo aa > in || framework_failure_
  14 echo 'grep: reference to non-existent subpattern' > exp-err \
  15   || framework_failure_
  16
  17 fail=0
  18
  19 for xw in x w; do
  20   grep -P$xw '(.)\1' in > out 2>&1 || fail=1
  21   compare out in || fail=1
  22
  23   grep -P$xw '(.)\2' in > out 2> err && fail=1
  24   compare /dev/null out || fail=1
  25   compare exp-err err || fail=1
  26 done
  27
  28 Exit $fail