[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: regexp and valid-sre?
On 11/26/2013 10:19 AM, John Cowan wrote:
Michael Montague scripsit:
I propose dropping the requirement that 'regexp' can be called with
an already compiled <re>. It provides no additional functionality
and it makes the specification of 'regexp' less clear.
It provides the ability to compile repeatedly used parts of regular
expressions. In a context where a large number of regular expressions
are in use that have factors in common, this can save a good deal of
time and possibly space.
That would require calling 'regexp' with a <sre> containing an <re>. I
don't see where in the grammar that you are allowed to have an <re> as
part of an <sre>.