[plt-scheme] puzzled by 'new' failure

From: Eli Barzilay (eli at barzilay.org)
Date: Wed Aug 26 11:06:18 EDT 2009

On Aug 26, David Richards wrote:
> On Aug 26, 2009, at 12:27 AM, Jay McCarthy wrote:
> > What language are you writing it in? scheme/gui?
> >
> > #lang scheme/gui
> I admit I haven't used PLT Scheme in a while, but what is this
> "#lang scheme/gui" line about? Is it some sort of 'pragma'? Do we
> have pragma now? This is new and exciting.
> Whatever the case, it might compress progress, because it causes a
> new error:
> read: #lang expressions not currently enabled

You're probably using some language like Pretty Big -- if this is the
case, then you should switch to the Module language.

The `#lang' line is not a pragma -- it is a kind of a declaration that
determines the language that the file is written in.  It is similar in
nature to the <lang> in

  (module my-module <lang>

except that it can also control the syntax of the code.

          ((lambda (x) (x x)) (lambda (x) (x x)))          Eli Barzilay:
                    http://barzilay.org/                   Maze is Life!

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