[boost] Repeating sub_match's, nested expression matching

From: Spinka, Kristofer (kspinka_at_[hidden])
Date: 2003-12-02 19:10:46

John, All,

   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?

   Thanks,

   /kristofer