Derek Parnell wrote:
On Mon, 04 May 2009 10:09:56 -0500, Andrei Alexandrescu wrote:
dsimcha wrote:
Is there an *efficient* way to simply test whether a given string contains a
given regex in the new std.regex? Using match() and testing for empty works,
but this apparently triggers a bunch of unnecessary heap allocation. If not,
is this a universal enough feature to warrant an enhancement request?
If you only search once, there will be allocation. However, if you
search for the same regex several times there will be no extra
allocation so the cost will be amortized.
ranslation: No, there isn't "an *efficient* way".
I think your translation omits important information. I meant exactly
what I said: one isolated search can't be currently helped. Repeated
searches can. This is because one search triggers the construction of a
regex engine, which in turn allocates memory.
Andrei
