From: "Linus Björnstam" <linus.bjornstam@veryfast.biz>
To: "Lassi Kortela" <lassi@lassi.io>, guile-devel@gnu.org
Subject: Re: Add internal definitions to derived forms
Date: Fri, 18 Nov 2022 13:53:21 +0100 [thread overview]
Message-ID: <2ffeb6fa-87eb-4008-9881-91b3e71a1fc3@app.fastmail.com> (raw)
In-Reply-To: <8187541f-a4e0-2f26-e8b7-df7fb82bb9f0@lassi.io>
On Fri, 18 Nov 2022, at 11:22, Lassi Kortela wrote:
> R7RS defines the syntax of `let` et.al. as follows (section 3.5):
>
> (let (<binding spec>*) <tail body>)
>
> Where:
>
> <tail body> = <definition>* <tail sequence>
> <tail sequence> = <expression>* <tail expression>
>
> So their definition of lambda:
>
> (lambda <formals> <definition>* <expression>* <tail expression>)
>
> could be abbreviated:
>
> (lambda <formals> <tail body>)
>
> I haven't read "Fixing letrec" but it looks like Guile intents to
> redefine <tail body> as follows:
>
> <tail body> = <definition-or-expression>* <tail expression>
> <definition-or-expression>* = <definition> | <expression>
>
> R6RS appears to use <tail body> in the same sense as R7RS.
That is a better way to write it indeed. clause-body being equal to a lambda body.
Thank you.
next prev parent reply other threads:[~2022-11-18 12:53 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-09 15:32 Add internal definitions to derived forms Linus Björnstam
2022-11-09 15:46 ` Damien Mattei
2022-11-17 7:25 ` lloda
2022-11-18 9:04 ` Linus Björnstam
2022-11-18 9:27 ` Lassi Kortela
2022-11-18 9:50 ` Linus Björnstam
2022-11-18 10:22 ` Lassi Kortela
2022-11-18 12:53 ` Linus Björnstam [this message]
2022-11-18 13:18 ` Lassi Kortela
2023-01-19 17:54 ` lloda
2023-01-20 17:37 ` lloda
2023-01-23 22:13 ` Ludovic Courtès
2023-01-23 23:28 ` lloda
2023-01-24 7:33 ` Linus Björnstam
2023-01-24 9:02 ` Ludovic Courtès
2023-01-24 17:59 ` lloda
2023-01-25 10:33 ` Ludovic Courtès
2023-01-25 15:09 ` Ludovic Courtès
2023-01-25 15:38 ` Greg Troxel
2023-01-25 21:38 ` Linus Björnstam
2023-01-25 21:06 ` Linus Björnstam
2023-02-02 11:17 ` lloda
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