srfi-89 implementation for guile

srfi-89 implementation for guile

[Martin Becze]

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Hi Guilers,
I implemented srfi-89 (Optional positional and named parameters)
https://gitlab.com/mjbecze/guile-srfi-89/

It is hygienic and reuses guile's lambda* so there is minimal overhead.

Cheers!,
-Martin Becze


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Re: srfi-89 implementation for guile

[Linus Björnstam]

Well done! Macros are great fun. I glanced through your source and could follow it without much hickups. You probably know this already, but you can actually do the sanitize-rest at compile time for cases where the procedure is not passed as an argument to some.other procedure.

Say we (define* (blah ...) Body...).

Then you define one function that does argument checking (%blah-check) at runtime and one that does not (%blah)

Then make the regular blah a macro. Using identifier macros you dispatch to %blah-check if it is not used in call position, or check all keyword arguments and sanitize them at compile time and dispatch it to %blah. 

I spent some time implementing define-inlinable*, a keyword-aware define-inlinable, using that. I never baked it fully, so I never submitted a patch, but that is the approach I took, and the approach that define-inlinable uses which you can find in the guile sources.



-- 
  Linus Björnstam

On Mon, 10 Aug 2020, at 22:07, Martin Becze wrote:
> Hi Guilers,
> I implemented srfi-89 (Optional positional and named parameters)
> https://gitlab.com/mjbecze/guile-srfi-89/
> 
> It is hygienic and reuses guile's lambda* so there is minimal overhead.
> 
> Cheers!,
> -Martin Becze
> 
> 
> Attachments:
> * signature.asc

Re: srfi-89 implementation for guile

[Martin Becze]

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On 8/10/20 4:26 PM, Linus Björnstam wrote:
> Well done! Macros are great fun. I glanced through your source and could follow it without much hickups. 

Thanks! It has been good learning experience.

> You probably know this already, but you can actually do the sanitize-rest at compile time for cases where the procedure is not passed as an argument to some.other procedure.
> 
> Say we (define* (blah ...) Body...).
> 
> Then you define one function that does argument checking (%blah-check) at runtime and one that does not (%blah)
> 
> Then make the regular blah a macro. Using identifier macros you dispatch to %blah-check if it is not used in call position, or check all keyword arguments and sanitize them at compile time and dispatch it to %blah. 
> 
> I spent some time implementing define-inlinable*, a keyword-aware define-inlinable, using that. I never baked it fully, so I never submitted a patch, but that is the approach I took, and the approach that define-inlinable uses which you can find in the guile sources.
> 

I hadn't thought of this at all. Interesting idea, might give it a try.


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Re: srfi-89 implementation for guile

[Leo Butler]

Martin Becze <mjbecze@riseup.net> writes:

> Hi Guilers,
> I implemented srfi-89 (Optional positional and named parameters)
> https://gitlab.com/mjbecze/guile-srfi-89/
>
> It is hygienic and reuses guile's lambda* so there is minimal overhead.
>
> Cheers!,
> -Martin Becze

In

https://gitlab.com/mjbecze/guile-srfi-89/-/blob/master/srfi/srfi-89.scm

the header refers to guile-json a couple times.

Leo