Re: Bug in eval-string?

[Matthias Koeppe]

Marius Vollmer <address@hidden> writes:

> What about adding "with" as a general dynamic scoping construct?
>
>   (with ((current-module) boxx)
>      ...)

Please don't.

AFAIK, dynamic-scoping hacks of this flavor are commonly known as
FLUID-LET in Scheme:

 - Syntax: fluid-let `(BINDINGS ...)' FORMS...

     (fluid-let ((VARIABLE INIT) ...)
        EXPRESSION EXPRESSION ...)

An implementation can be found in SLIB.  Due to Guile's generalized
set!, FLUID-LET also carries over to places like (CURRENT-MODULE)
instead of VARIABLE, if CURRENT-MODULE is a procedure-with-setter.

Regards,

-- 
Matthias Köppe -- http://www.math.uni-magdeburg.de/~mkoeppe