skaller wrote:

> You should share that experience here. It's hard to know
> when to go for a class and when a simpler algebraic data
> structure is better, so user experience reports (use cases)
> are valuable data.

Well the problem was that I wanted to do this:

    class lexstack top_filename 
        object
            val mutable filename = top_filename
            val mutable chan = open_in top_filename
            val lexbuf = Lexing.from_channel chan

Oops, error message right there ^^^^^^ trying to use instance
variable chan.

> Yep, it should. But you probably should generalise to 
> support conditional compilation as well.

Not part of my requirements so I'll skip that :-).

Erik
-- 
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Erik de Castro Lopo
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"Only wimps use tape backup: *real* men just upload their
important stuff on FTP, and let the rest of the world
mirror it ;)" -- Linus Torvalds