Re: Avoiding variable clashes

[Andy Wingo]

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?

Andy
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