Re: [boost] Repeating sub_match's, nested expression matching

From: John Maddock (john_at_[hidden])
Date: 2003-12-05 07:06:28

>    I see this has been brought up time after time,
> however, I think this is a very valuable feature.
>  Microsoft's .NET regular expression object supports this
> and I find it very useful.  I use a little tool called
> Expresso to test regular expression patterns, if you want
> to try some tests.
>
>    It would be nice if the sub_match struct had a
> collection member, also accessible by an index operator
> ([]), that would normally be null, unless there were
> sub_match?s.  Also, the existing cast operator for the
> string could be expanded to iterate through them.
>
>    Is something like this in the works?  Or maybe even
> already available?

No it's not available, and I've tended to resist this in the past mainly on
efficiency grounds - however having had a quick look at the source I think
it can be added fairly easily - let me experiment a little and I'll see how
it works out.  However, with the next release due real soon now, I can't
promise that this will be in boost.1.31.0.

John.