Re: [Libguestfs] [PATCH 0/2] Add lightweight bindings for PCRE.
On Wed, Aug 02, 2017 at 03:01:53PM +0200, Pino Toscano wrote:
On Wednesday, 2 August 2017 13:52:06 CEST Richard W.M. Jones wrote:
> I think you're suggesting this:
>
> let m = PCRE.exec re "ccaaaabb" in
> if PCRE.matches m then (
> let whole = PCRE.sub m 0 in
Not really, my suggestion was to have a separate object representing
the result of a regex match -- much like other language have in their
regex APIs.
OTOH, this solution LGTM as well: the result of the regex is not saved
in a thread-local variable, but directly in the same regex object, so
can be kept/used around, and it is GC'ed when not needed anymore.
If you could apply that change, that'd be a LGTM.
But the problem still is this makes the if/else chains more awkward.
What's really wrong with the thread-local variable? It only stores a
single string and a vector of integers per thread (at most). The
final string/vector is reliably freed on exit - I know that because
I've checked it with valgrind.
Rich.
--
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