[Templates] reiteration question, by increments of something other than 1

[Andy Wardley]

Me wrote:
> FOREACH y = [0..40]
> 
> --> but I want to increment by 3

There's no built-in support for it in TT2, but you can achieve the 
desired effect with something like this:

   [% FOREACH x IN [0..13]; y = x * 3 %]

The improvements in the parser for TT3 means that we'll be able to 
support a more diverse grammar, allowing you to write this:

   [% FOREACH y FROM 0 TO 40 STEP 3 %]

Without digressing into a long technical discussion, the architecture of 
the TT2 parser makes it hard, if not impossible, to change the TT2 
language, even in minor ways like this.  (Actually, it's not that you 
can't change it, but it's the knock-on effects that changes tend to 
have.  Global keywords and all that. But I digress....)  So that's why 
we've got a brand new parser for TT3 which makes these problems go away.

HTH
A