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Re: `pp-eval-expression' behaves strangely under lexical binding


From: Marcin Borkowski
Subject: Re: `pp-eval-expression' behaves strangely under lexical binding
Date: Sun, 17 Apr 2016 19:42:18 +0200
User-agent: mu4e 0.9.13; emacs 25.1.50.8

On 2016-04-17, at 16:15, Stefan Monnier <address@hidden> wrote:

>> But isn't my question still valid for `symbol-value'?
>
> No, whether it's implemented in C or in Lisp is irrelevant.  As soon as
> you put a symbol into a `quote`, it can't be a reference to a lexical
> variable any more because the compiler will treat it as data and data
> cannot refer to lexical variables, only to other data.
>
> Dynamically scoped variables are data, on the other hand (they're just
> a particular field of a symbol object, which is a kind of "struct").

Stefan, thanks for your answer.  I'm not entirely sure I understand it,
but I'm going to give it some thinking, and if it is still unclear, I'll
get back here.

Best,

-- 
Marcin Borkowski
http://octd.wmi.amu.edu.pl/en/Marcin_Borkowski
Faculty of Mathematics and Computer Science
Adam Mickiewicz University



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