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Re: Anything better for delayed lexical evaluation than (lambda () ...)?
From: |
Andy Wingo |
Subject: |
Re: Anything better for delayed lexical evaluation than (lambda () ...)? |
Date: |
Tue, 13 Dec 2011 19:49:56 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/23.3 (gnu/linux) |
On Tue 13 Dec 2011 18:28, Mark H Weaver <address@hidden> writes:
> >> (let ((xxx 2))
> >> #{ #(set! xxx (1+ xxx)) #})
> In the general case, Lilypond needs to _execute_ the outer Scheme code
> before the parser/evaluator is able to even _see_ the inner Scheme code,
> because it needs to parse/evaluate the Lily code in between the two, and
> we've already established that parsing cannot be not be done without
> runtime information.
What does it mean to execute a `(let ((xxx 2))' ? I think I need to
read the thread again, because I am really not getting it.
> (let ((xxx 2))
> (capture-lexical-environment))
>
> How difficult would it be to implement this?
Dunno. I was thinking that we could have a special form to return a
list of the identifiers in scope. Or perhaps, some syntax-bindings
procedure, to operate on syntax objects. A macro could use that data to
make a closure that captures all of the bindings, if that's your thing.
Andy
--
http://wingolog.org/
- Re: Anything better for delayed lexical evaluation than (lambda () ...)?, (continued)
- Re: Anything better for delayed lexical evaluation than (lambda () ...)?, David Kastrup, 2011/12/13
- Re: Anything better for delayed lexical evaluation than (lambda () ...)?, Andy Wingo, 2011/12/13
- Re: Anything better for delayed lexical evaluation than (lambda () ...)?, David Kastrup, 2011/12/13
- Re: Anything better for delayed lexical evaluation than (lambda () ...)?, Andy Wingo, 2011/12/13
- Re: Anything better for delayed lexical evaluation than (lambda () ...)?, David Kastrup, 2011/12/13
- Re: Anything better for delayed lexical evaluation than (lambda () ...)?, Andy Wingo, 2011/12/13
- Re: Anything better for delayed lexical evaluation than (lambda () ...)?, David Kastrup, 2011/12/13
- Re: Anything better for delayed lexical evaluation than (lambda () ...)?, Andy Wingo, 2011/12/13
- Re: Anything better for delayed lexical evaluation than (lambda () ...)?, David Kastrup, 2011/12/13
- Re: Anything better for delayed lexical evaluation than (lambda () ...)?, Mark H Weaver, 2011/12/13
- Re: Anything better for delayed lexical evaluation than (lambda () ...)?,
Andy Wingo <=
- Re: Anything better for delayed lexical evaluation than (lambda () ...)?, Mark H Weaver, 2011/12/13
- Re: Anything better for delayed lexical evaluation than (lambda () ...)?, Noah Lavine, 2011/12/13
- Re: Anything better for delayed lexical evaluation than (lambda () ...)?, David Kastrup, 2011/12/13
- Re: Anything better for delayed lexical evaluation than (lambda () ...)?, Andy Wingo, 2011/12/13
- Re: Anything better for delayed lexical evaluation than (lambda () ...)?, Andy Wingo, 2011/12/13
- Re: Anything better for delayed lexical evaluation than (lambda () ...)?, David Kastrup, 2011/12/13
- Re: Anything better for delayed lexical evaluation than (lambda () ...)?, Andy Wingo, 2011/12/14
- Re: Anything better for delayed lexical evaluation than (lambda () ...)?, David Kastrup, 2011/12/14
- Re: Anything better for delayed lexical evaluation than (lambda () ...)?, Mark H Weaver, 2011/12/13
- Re: Anything better for delayed lexical evaluation than (lambda () ...)?, David Kastrup, 2011/12/14