What's the right way to test if regex.match() hits or not?

[Russell Lewis]

Jarrett Billingsley wrote:
> On Tue, Jun 2, 2009 at 12:16 AM, Russell Lewis
> <webmaster at villagersonline.com> wrote:
> 
>> P.S. Does anybody know why dmd complains "cannot evaluate at compile time"
>> when I set those regex objects to "static invariant" so I'm not rebuilding
>> them with every pass?
>>
> 
> Because it wants you to have a constant expression to initialize a
> static variable, and so it tries to evaluate regex(...) at compile
> time.  You know, there's a much easier way to prevent them from being
> reinitialized every iteration - move their declaration above the loop.

Of course!  But then, the code is harder to read.  I'll bite the bullet 
and move it above the loop, but it's ugly.

And yeah, I know about CTFI and the issues there...I just thought that 
regex was designed to allow CTFI.  I guess I was wrong?

BTW: I found out how to check if there was a match or not: the empty() 
function.