Re: LPEG vs. PCRE (was: Can someone convert this POSIX regex to a Lua regex?)

[Philippe Lhoste <PhiLho@...>]

On 22/10/2009 06:03, Fernando P. García wrote:
> Based on your experience, may you tell me why LPEG is better than PCRE?

It might be arguable for simple patterns like checking a date format (without checking the 
validity of the date!) or looking that a string has no spaces, for example.
But for real parsing (using context and such), a parser (Peg based or something else) is 
always better than a RE engine... :-)

It might be interesting to do some comparisons (memory usage, speed, compactness of 
expression vs. readability, etc.) between Lpeg and a binding of PCRE for a number of cases 
(from simple cases above to the shown expression using lot of alternatives, look-ahead 
expressions and so on).
I am not volunteer...

:-)

--
Philippe Lhoste
--  (near) Paris -- France
--  http://Phi.Lho.free.fr
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