[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: Avoiding variable clashes

From: Andy Wingo
Subject: Re: Avoiding variable clashes
Date: Wed, 13 Apr 2011 17:27:45 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.2 (gnu/linux)

On Wed 13 Apr 2011 16:34, Hans Aberg <address@hidden> writes:

> On 13 Apr 2011, at 16:19, Andy Wingo wrote:
>>> What method is Guile using to avoid substitution variable clashes (de
>>> Bruijn numbers, combinators, etc.)?
>> Each lexical variable is given a fresh name (a gensym) when it is
>> introduced.  The expander keeps an environment as to what name maps to
>> what gensym, and residualizes the gensym in the lexical reference or
>> assignment.
>> See "The Scheme Compiler" in the manual, for more.
> I am thinking about it in the context of other types of binders, that
> satisfies the alpha-rule, but not the beta, useful in math (like theorem
> provers). Has that been discussed?

Sorry, I don't know what you mean.  References?


reply via email to

[Prev in Thread] Current Thread [Next in Thread]