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Re: lexical-binding questions


From: Stefan Monnier
Subject: Re: lexical-binding questions
Date: Sat, 05 May 2012 09:29:39 -0400
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.1.50 (gnu/linux)

> Also, in CL, the declare spec is placed at the beginning of the let
[...]
> Why does it behave differently from CL?

Because it forces the interpreter to check for the presence of
a `declare' every time it sees a `let', even though it will only find
one once per century or so.
It's an OK design for a language where there's always going to be
a pre-processing of some sort before evaluation but for Emacs's pure
naive interpreter it's inconvenient.


        Stefan



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