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From: Mark H Weaver <mhw@netris.org>
To: Andy Wingo <wingo@pobox.com>
Cc: guile-devel <guile-devel@gnu.org>
Subject: Re: summary: lilypond, lambda, and local-eval
Date: Fri, 16 Dec 2011 03:08:35 -0500	[thread overview]
Message-ID: <87hb11j5vg.fsf@netris.org> (raw)
In-Reply-To: <87pqfpj7e3.fsf@netris.org> (Mark H. Weaver's message of "Fri, 16 Dec 2011 02:35:48 -0500")

I wrote:
> The <compiler-environment> would include a list of lexical variable
> names (<var> ...), which must exactly correspond to the closure slots of
> the `case-lambda', in order to implement `local-eval'.  We _might_ also
> need to include some information about how those variables are stored,

Sorry, this paragraph should have ended here.  The following unfinished
caveat should have been deleted:

> e.g. a flag telling whether they are boxed.  (Usually they will all be
> boxed, but

I was thinking about an edge case where the result of (the-environment)
never escapes the local block, and thus a clever optimizer might be able
to avoid boxing some of the lexicals.  However, I later realized that
this could only happen if the returned environment was never passed to
`local-eval', in which case none of this matters anyway.

     Mark



  reply	other threads:[~2011-12-16  8:08 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-12-15 10:21 summary: lilypond, lambda, and local-eval Andy Wingo
2011-12-15 14:46 ` David Kastrup
2011-12-15 16:52 ` Hans Aberg
2011-12-15 17:24   ` David Kastrup
2011-12-15 17:52     ` Hans Aberg
2011-12-16  7:35 ` Mark H Weaver
2011-12-16  8:08   ` Mark H Weaver [this message]
2011-12-16  8:49   ` Mark H Weaver
2011-12-16  9:16     ` David Kastrup
2011-12-18  7:11     ` Mark H Weaver
2011-12-18 11:27       ` Andy Wingo
2011-12-18 15:32         ` Noah Lavine
2011-12-18 16:19           ` David Kastrup
2011-12-18 21:24             ` Noah Lavine
2011-12-19  9:13         ` Mark H Weaver
2012-01-09 14:44           ` David Kastrup
2011-12-16  9:28   ` Andy Wingo
2011-12-16  9:59     ` David Kastrup
2011-12-16 10:33     ` Mark H Weaver
2011-12-16 12:13       ` Hans Aberg
2011-12-16 12:43         ` David Kastrup
2011-12-16 14:57           ` Hans Aberg
2011-12-21 10:32 ` Ian Hulin

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