Thanks Taylan,
> On 18. Mar 2020, at 07:12, Taylan Kammer wrote:
>
> On 18.03.2020 00:50, Massimiliano Gubinelli wrote:
>> (let ((a (values "a" "b" "c"))) a)
>
> The result of (values x y z) is not a kind of object that contains three
> values (like a list or vector). It's three separate valu
Let me precise my concerns.
I know I can do
(begin
(initialization-code)
(let ((vals (call-with-values (lambda () (bar)) (lambda vals vals
(finalization)
(apply values vals)))
this is the hack I'm using now in my code. But my question is: does it incur
performance penalties (it will
On 3/18/20 2:55 AM, Massimiliano Gubinelli wrote:
I understand the point but then it comes to the problem how to handle this in macros. For
example if bar is a proceduce which returns multiple values and I have a macro
"my-macro" which wraps the call with some initialization and finalization
> On 18. Mar 2020, at 13:39, Matt Wette wrote:
>
>
> How about calling (my-macro/values bar) where my-macro/values expands to
>
> (call-with-values (lambda () (bar))
> (lambda args (finalization-code) (apply values args))
>
> Matt
>
>
Yeah! I like this better. But still wraps and unwrap
There is going to be a performance penalty, because you are taking multiple
values (which is not a value) and making it into a value by creating a
list. There is no getting away from that except to exclude multiple values.
Note also that if the procedure throws an exception, your finalizer will
n
Good point with dynamic-wind. Does it pass along also multiple values or has
the same problem?
m
> On 18. Mar 2020, at 15:06, John Cowan wrote:
>
> There is going to be a performance penalty, because you are taking multiple
> values (which is not a value) and making it into a value by creati
> On 18. Mar 2020, at 15:40, Massimiliano Gubinelli
> wrote:
>
> Good point with dynamic-wind. Does it pass along also multiple values or has
> the same problem?
>
Does not work...
mgubi@Ulrike guile3-usr % bin/guile
GNU Guile 3.0.1
Copyright (C) 1995-2020 Free Software Foundation, Inc.
G
On Wed, Mar 18, 2020 at 03:48:03PM +0100, Massimiliano Gubinelli wrote:
>
> > On 18. Mar 2020, at 15:40, Massimiliano Gubinelli
> > wrote:
> >
> > Good point with dynamic-wind. Does it pass along also multiple values or
> > has the same problem?
> >
>
> Does not work...
>
> mgubi@Ulrike gui
Yes. Sorry. My bad, I had coded by copy&paste my previous example and is
obviously not going to work.
Indeed dynamic-wind works as it should:
mgubi@Ulrike guile3-usr % bin/guile
GNU Guile 3.0.1
Copyright (C) 1995-2020 Free Software Foundation, Inc.
Guile comes with ABSOLUTELY NO WARRANTY; for
