Oups, forget about my last post, I was under the impression you could not
bind to a declared thing... wrong was I...
Luc P.
lprefonta...@softaddicts.ca wrote ..
> Hi Cameron,
>
> Use def or defvar (if you use contrib.def) to create an instance of *macros*.
> Declare is used for forward references (when you reference something
> before declaring it) so the compiler knows that your code is sane but it does
> not "define" anything by itself.
>
> Yes, it may look a bit confusing at first glance but declaring
> something and defining something are not the same...thing :)))
>
> Luc P,
>
> Cameron Pulsford <cpuls...@gmail.com> wrote ..
> > Hello all, here is an extremely reduced version of a problem I'm not
> > sure how to work around. (It's going to be a toy assembly language if
> > anyone's wondering) When I call assemble in the following code I get
> > the error: "java.lang.IllegalStateException: Var reader/*macros* is
> > unbound." I'd like *macros* to always be rebound for whatever source
> > file is being compiled and I'd rather not explicitly pass the map of
> > macros (and other things not shown here) to every function in the
> > hierarchy just to supply some of the bottom level worker functions
> > with the information they need.
> >
> > Is there a way to do this? Besides cleaning up function signatures is
> > this a premature optimization to begin with?
> >
> > (declare *macros*)
> >
> > (defn macro-expand [tokens]
> > (map #(get *macros* % %) tokens))
> >
> > (defn compile-op [op]
> > (macro-expand op))
> >
> > (defn assemble [{:keys [macros syms blks fncs]}]
> > (binding [*macros* macros] ;; I thought binding would handle this,
> > but I must be misusing it
> > (let [compiled-ops (map compile-op fncs)]
> > compiled-ops)))
> >
> >
> >
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