Bug#324800: perl: backslash not working as expected in m(\() and m[\[]

[Niko Tyni]

On Wed, Aug 24, 2005 at 08:10:44AM +0300, era eriksson wrote:
> Package: perl
> Version: 5.8.7-4
> Tags: upstream
> 
> When square or round brackets are used as regular expression delimiters,
> the expression apparently cannot contain a backslash-escaped literal
> opening delimiter bracket.

Summary: see perlop.pod, "Gory details of parsing quoted constructs".
 
> I see nothing in the documentation to suggest that this is intentional
> or expected behavior.
> 
>  vnix$ $ perl -ne 'print if m(\()' </dev/null
>  Unmatched ( in regex; marked by <-- HERE in m/( <-- HERE / at -e line
>  1.