[plt-scheme] puzzled by 'new' failure

From: David Richards (leximatica at mac.com)
Date: Wed Aug 26 11:29:35 EDT 2009

On Aug 26, 2009, at 11:06 AM, Eli Barzilay wrote:

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

I see. So instead of 'shebang' (#!) we now have 'shelang' (#lang).


- d

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

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