Re: Making the -e option compatible with new versions of Guile 1.4

[Marius Vollmer]

Neil Jerram <address@hidden> writes:

> [..] Also reminds me of an extension to @ or @@ that I was
> going to ask about.  Namely, so as to allow lookups within the
> environment of a closure.

Hmm, I don't think we should extend @ or @@ to do this.  Lexical
variables are different from global ones: they only exist within a
given environment and you need to specify that environment when
accessing them.  @ and @@ can not specify this environment.

> So, for example, with
>
> (define (xxx . args)
>    (define (internal-proc x y z)
>      ...)
>    ...)
>
> one could reference the procedure for "internal-proc" as
>
>    (@@ (MODULE NAME) xxx internal-proc)

Which procedure should this refer to?  Every call to xxx creates a new
procedure named 'internal-proc'.

> Probably only useful for debugging - i.e. it would make it possible to
> set a breakpoint on internal-proc - and other kinds of introspection,
> but what do you think?

Hmm, yes, in a debugger, your syntax could refer to all procedures
every created.  So it could be part of the syntax of the debugger, I
don't think it can be part of the syntax of normal Scheme programs.