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ArneBab

1 year ago

ArneBab
1 year ago

that’s actually a really cool trick — the many with-usages (like locks!) are a huge boon to understandable code.

And while it took me 25 lines of code to implement this with with wisp ( hg.sr.ht/~arnebab/wisp/browse/… ) it’s only Python where that’s the default way to do things.

(there is no superfluous with in the previous paragraph ☺)

Being able to add stuff like this to the language cleanly is why I started to move my personal projects from #Python to #Guile #Scheme in 2013, though.

Code implementing with:

define-module : examples with

import : oop goops

define : enter thing
. thing
define-generic enter

define : exit thing
. thing
define-generic exit

define-syntax with
syntax-rules : as
: _ thing as name thunk ...
let*
: name : enter thing
res : begin thunk ...
exit thing
. res

define-method : exit (thing <port>)
. "Ensure that a port is always closed at the end of the with-block."
close-port thing

define : main args
with (open-file "with.w" "r") as port
format #t "~a\n" : read port

code example:

with (open-file "with.w" "r") as port
format #t "~a\n" : read port

~arnebab/wisp - sourcehut hg

^hg.sr.ht

Please wait

View in context

Hey there I wrote an update about Guile Hoot, Spritely's Scheme -> WASM compiler project, and it includes an embedded demo that works on the latest Chrome Dev or Firefox Nightly. The WASM GC future is here. We think Hoot is a pretty unique and cool project in the WASM world and I hope this post explains why in an understandable way.

spritely.institute/news/scheme…

#scheme #wasm #guile #spritely