[TxMt] Help with indentation rules for IDL

I do a lot of programming in the IDL (Interactive Data Language). It is an interpreted language that is very good for scientific programming and data visualization. I've been using Emacs and the idlwave mode for editing. I'm trying TextMate to avoid the overhead that comes with emacs.

At this point I've developed a language grammar that works for styling the text. I'm having trouble, however, with indentation rules. A typical IDL construct looks like

if a gt b then begin y = sin(z) endif else begin y = sin(x) endelse

or, alternatively, if a gt b then y = sin(z) else y = sin(x)

The keyword begin starts an indented block, the keyword end... ends a block.

I've tried /* preferences */ { decreaseIndentPattern = '\bend(if|else|for|while|case|repeat)?/b'; increaseIndentPattern = '\b(begin|case|function|pro)\b'; }

Which results in indenting: if a gt b then begin y = sin(z) endif else begin y = sin(x) endelse

You can probably tell I'm a regular expression neophyte, so any help would be greatly appreciated.

Thanks

----------------------------------------------------------- David A. Gell, Ph.D. David.A.Gell@umich.edu

University of Michigan Space Physics Research Lab 2129B Space Research Building phone: 734.763.6221 2455 Hayward Street fax: 734.615.9723 Ann Arbor, MI 48109-2143 mobile: 734.657.6824