Re: Order of the evaluation of elements in a quasiquote list.

[Geoffrey Knauth]

By comparison:
  PLT 299.100 and scsh 0.6.6 return (2 2).
  JScheme 7.1 and sisc 1.9.7 return (2 1).

Geoffrey
--
Geoffrey S. Knauth | http://knauth.org/gsk

On Apr 3, 2005, at 07:38, Kjetil Svalastog Matheussen wrote:

> On Sun, 3 Apr 2005, Neil Jerram wrote:
>
> > Kjetil Svalastog Matheussen wrote:
> > > Hi, I have recently stumbled upon various bugs in my code
> > > because the order of the evaluation of the elements in a quasiquote
> > > list changes.
> >
> > Changes how?  Can you give us an example, to make things concrete?
>
> Sorry, this is the stripped down version of the cause of the bug I'm
> finding various places:
>
> (let ((a 1))
>   `( ,(begin (set! a 2) a)
>      ,a))
> -> (2 1)
>
> Wouldn't it be better if this one returned (2 2)?