On Sat, 3 Jan 2009, NN wrote:
> Is there
> (?(DEFINE)X)
> equivalent to
> X{0}Yes, if that is the complete regex. Also equivalent to an empty string. No, if that is part of a larger regex that refers to any group contained within the DEFINE. Please read the "pcrepattern" man page for a description of what DEFINE is used for. Philip -- Philip Hazel -- ## List details at http://lists.exim.org/mailman/listinfo/pcre-dev
