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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