Kanishk Sachan e3d80f59e2 fix: reject multiple patterns when -P/--perl-regexp is used ...

GNU grep's PCRE backend supports only a single pattern. Supplying
multiple patterns via repeated -e flags, or a pattern string that
contains a literal newline, must exit 2 with the message:

    the -P option only supports a single pattern

Add the validation immediately after patterns are collected, before
regex-mode selection. Add a test covering:
  - two separate -e flags with -P
  - a newline-embedded pattern string with -P
  - single -e with -P still works normally

Closes #34

2026-06-05 01:25:22 +01:00

..

test_grep.rs

fix: reject multiple patterns when -P/--perl-regexp is used

2026-06-05 01:25:22 +01:00