Re: [Chicken-users] Evaluating lists with scoped let's and applying scoped macros to lists

[Tobia Conforto]

Christoph Angerer wrote:
> (define (interpret prog)
>   (let [(myadd +) (mymul *)]
>     (eval prog)))
>                         
> (display (interpret '(myadd 4 (mymul 5 2))))

This cannot possibly work.

The symbol myadd is lexically scoped to the let block. The invocation  
of interpret is *outside* the let block. Period.

What you are looking for is an enhanced version of (eval) that can  
accept a user-defined environment. You will find it in unit  
environments: http://chicken.wiki.br/environments

Tobia