* Release of Scheme+ for Guile version 9.1
@ 2024-06-28 13:44 Damien Mattei
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From: Damien Mattei @ 2024-06-28 13:44 UTC (permalink / raw)
To: guile-user
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Hello,
i released Scheme+ for Guile version 9.1:
https://github.com/damien-mattei/Scheme-PLUS-for-Guile
It is a big refactoring of code,now completely implemented with modules and
still use syntax transformers.
It add very few new features but it is a complete refactoring of the code
presentation using modules. (instead of mixed included/imported files of
the previous releases)
I use the Guile modules instead of R*RS (that have little problem in
current version of Guile)
Scheme+ add a lot of "syntactic sugar" to Scheme : infix with precedence
operator, [ ] square bracket notation for indexed objects (vector, arrays,
strings,...), and much more i can not describe in a short message.
Here is a limited (not all) overview of the modules dependencies focusing
on the infix and square bracket SRFI 105 interaction:
[image: schema-scheme+.jpg]
So now we can use all features of Scheme+ or only load what we want module
by module.
Examples:
to use operator precedence in infix:
scheme@(guile-user)> (use-modules (nfx))
scheme@(guile-user)> {3 * 5 + 2}
$1 = 17
to use square bracket with vectors,strings,hash tables, arrays,etc ... :
scheme@(guile-user)> (use-modules (bracket-apply))
scheme@(guile-user)> {#(1 2 3 4 5)[2]}
$2 = 3
scheme@(guile-user)> (use-modules (slice))
scheme@(guile-user)> {"hello"[0 : 5 : 2]}
$4 = "hlo"
scheme@(guile-user)> {"hello"[: : -1]}
$5 = "olleh"
(this slicing syntax is same as Python syntax adapted to Scheme, with a few
differences inherent to Scheme/Python objects differences)
I will describe slowly and more precisely in other messages each one of
the features of Scheme+ in the next weeks.
Regards,
Damien
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2024-06-28 13:44 Release of Scheme+ for Guile version 9.1 Damien Mattei
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