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Re: Anything better for delayed lexical evaluation than (lambda () ...)?

From: David Kastrup
Subject: Re: Anything better for delayed lexical evaluation than (lambda () ...)?
Date: Wed, 14 Dec 2011 20:44:39 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.0.92 (gnu/linux)

David Kastrup <address@hidden> writes:

> To be fair: this is what we currently do, and we only actually call
> those lambdas that end up actually being recognized by the grammar.
> So as long as (primitive-eval `(lambda () ,(read))) is guaranteed to
> not ever choke, the potential for error is limited.

Come to think of it: an actual optimizing compiler is quite more likely
to get annoyed at (lambda () total-garbage-sexp) before one actually
tries calling it.  So even when letting Guilev1 and Guilev2 compete by
letting both use the lambda-based implementation, we might run into more
problems using Guilev2 because of having to wrap all _potential_ runtime
candidates for lexical evaluation into closures.

David Kastrup

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