Jose A. Ortega Ruiz wrote:
> I'm implementing sending code in emacs factor buffers to the listener
> for evaluation.
Cool!
> When i'm sending just part of the buffer (say, a word
> definition), i'm assuming that i need to tell the listener where to
> evaluate the definition using IN:, and the list of USING: vocabs (as
> pointed out by Slava in a previous mail). So my strategy is:
>
> 1) Recover from the listener its current vocab:
> ( initial-vocab ) in get .
> storing it for later.
> 2) Provide the USING: form in the buffer
> ( initial-vocab ) USING: a b c ..;
> 3) Change to the buffer vocab with:
> ( initial-vocab ) IN: buffer-vocab
> 4) Evaluate the definition
> ( buffer-vocab ) : blah ( -- ) foo bar ;
> 5) Return to the vocab recovered in 1):
> ( buffer-vocab ) IN: initial-vocab
> ( initial-vocab )
>
> Does that make any sense?
Yup. And the nice thing is that it looks like a solid strategy in that it's
what somebody would do manually, and in that respect, the above should always
work.
> Assuming it does, I was wondering if there's a
> better way of doing the above. In particular:
> - I've tried to find some form of push/pop vocab for 1) and 5) without
> success.
Well, 'in' doesn't represent a list like 'use' does so pushing and poping from
it doesn't make sense. However, you could have your own stack for
saving/restoring 'in'. Something like:
: in-stack V{ } ;
: save-in in get in-stack push ;
: restore-in in-stack pop in set ;
But it sounds like you don't need something even that elaborate.
> - I've noticed that USING: keeps adding new elements to the 'use'
> variable, which sounds like a bit of duplication if the user keeps
> evaluating redefinitions with the same USING:... should that be a
> concern?
I've notice this too, have wondered the same thing, and it's a good question
for Slava. :-)
Ed
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