Working Group 2 is pleased to announce the first draft of the second part of the R7RS-Large Foundations, the "Procedural Fascicle". This draft encompasses the familiar block programming forms, such as lambda, let, if, or, and set!.
The biggest new feature is the ability to mix definitions and expressions in bodies, such as the body of a lambda. For example, the following is now valid:
We welcome any and all comments on the draft. Anyone can comment by
* Filing an issue on the R7RS-Large issue tracker <https://codeberg.org/scheme/r7rs>
* Sending mail to the Working Group 2 mailing list <https://groups.google.com/g/scheme-reports-wg2> (you do not need a google account)
* Sending mail to the Scheme Reports mailing list <https://scheme-reports.simplelists.com/> and <scheme-reports@scheme-reports.org>
* Sending mail to the corresponding member Peter McGoron at <code@mcgoron.com>. I will forward your comment to the public issue tracker. Please indicate if you wish to be anonymous.
Delimited continuation machinery? It seems like call/cc is becoming quite a bit more acknowledged as being overkill while the more restricted shift/reset, control/prompt, F-operator stuff, etc. compose better.
We plan to add delimited continuations in a later draft. What the actual API will look like is still in question. There is a proposal for a large API, like Racket's <https://srfi.schemers.org/srfi-226/> and a minimalistic API <https://srfi.schemers.org/srfi-248/> similar-ish to Guile's.
Hello everyone.
Working Group 2 is pleased to announce the first draft of the second part of the R7RS-Large Foundations, the "Procedural Fascicle". This draft encompasses the familiar block programming forms, such as lambda, let, if, or, and set!.
The draft is available here:
https://r7rs.org/large/fascicles/proc/
The biggest new feature is the ability to mix definitions and expressions in bodies, such as the body of a lambda. For example, the following is now valid:
We welcome any and all comments on the draft. Anyone can comment by* Filing an issue on the R7RS-Large issue tracker <https://codeberg.org/scheme/r7rs> * Sending mail to the Working Group 2 mailing list <https://groups.google.com/g/scheme-reports-wg2> (you do not need a google account) * Sending mail to the Scheme Reports mailing list <https://scheme-reports.simplelists.com/> and <scheme-reports@scheme-reports.org> * Sending mail to the corresponding member Peter McGoron at <code@mcgoron.com>. I will forward your comment to the public issue tracker. Please indicate if you wish to be anonymous.
> The biggest new feature is the ability to mix definitions and expressions in bodies, such as the body of a lambda.
Looks like Rust. It helps macros a lot
Delimited continuation machinery? It seems like call/cc is becoming quite a bit more acknowledged as being overkill while the more restricted shift/reset, control/prompt, F-operator stuff, etc. compose better.
We plan to add delimited continuations in a later draft. What the actual API will look like is still in question. There is a proposal for a large API, like Racket's <https://srfi.schemers.org/srfi-226/> and a minimalistic API <https://srfi.schemers.org/srfi-248/> similar-ish to Guile's.