compile-time regex redux

[janderson]

Walter Bright wrote:
> String mixins, in order to be useful, need an ability to manipulate 
> strings at compile time. Currently, the core operations on strings that 
> can be done are:
> 
> At some point, this will prove a barrier to large scale use of this 
> feature.

While I'm a fan of regex I'm not sure it meets the goal of scale.  I can 
imagine that regex expressions + templates will get unreadable (or at 
least very slow to read) as programs get larger.

-Joel