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Re: scm_local_eval is not available in Guile V2.

From: David Kastrup
Subject: Re: scm_local_eval is not available in Guile V2.
Date: Tue, 15 Nov 2011 15:29:13 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.0.90 (gnu/linux)

Ian Hulin <address@hidden> writes:

> Hi all,
> The latest git now dies on my V2 Guile system with
> .../lily/ error 'scm_local_eval' was not declared in
> this scope.
> From Guile V2 NEWS
> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> ** No more `local-eval'
> `local-eval' used to exist so that one could evaluate code in the
> lexical context of a function. Since there is no way to get the lexical
> environment any more, as that concept has no meaning for the compiler,
> and a different meaning for the interpreter, we have removed the
> function.
> If you think you need `local-eval', you should probably implement your
> own metacircular evaluator. It will probably be as fast as Guile's
> anyway.
> -----------------------------------------------------------------------
> This did not crash on Guile V2 until I pulled the latest git
> repository today.  David, is this part of you ly:export removal or
> related parser brain surgery?

Related.  #{ ... #} is evaluated in the lexical context of the
surrounding function.  Is there anything that made Guile a flexible tool
left in Guile V2?  "compilation" gives us all the disadvantages and
rigidity of C at a fraction of its speed, it seems.

I'll have to see whether I can come up with something working even half
as nicely.  Probably will have to be rather close to the kludge we had

David Kastrup

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