[R] Parsing regular expressions differently - feature request

[Wacek Kusnierczyk]

Duncan Murdoch wrote:
>
>>>> Here's a quick hack to achieve the impossible:
>>> That might solve John's problem, but I doubt it.  As far as I can see
>>> it won't handle \L, for example.
>>>
>>
>> well, it was not supposed to.  it addresses the need for doubling
>> backslashes when a backslash character is an element of the regex. 
>
> \L could be an element of a regex in Perl.
>
> Duncan Murdoch
>
indeed;  but that's not something my PCRE will happily accept (try
grep("\\LA", "a", perl=TRUE), which may possibly tell you just that). 
if not \L, what's your next best argument against mygrep?

vQ