[Haskell-cafe] Re: Layout rule (was Re: PrefixMap: code review request)

Benjamin Franksen wrote:

TAB characters in program text should be forbidden by law.

Well... they are quite useful for lining things up if you're using a proportional font, and I don't think proportionally-spaced code is a bad idea. I want them to be optional. But it would be nice if parsers would warn about (or even reject) programs whose meaning depends on tab width. -- Ben