On Mar 26, 2009, at 7:24 PM, mikel wrote:
How would you write bound? (or alternatively, what is the name of the function that serves the same purpose)?This hypothetical function would return true if and only if its argument refers to a Var with a binding in the namespace where the reference appears.
A namespace maintains a mapping from unqualified symbols to Vars and/ or Classes.
You can see if there is a mapping for a symbol, my-sym, in a namespace, my-ns with:
(contains? (ns-map my-ns) my-sym)
If that returns true, you can distinguish between a Var and a Class
with:
(var? ((ns-map my-ns) my-sym))
If that returns true, it's a Var. A Var may be bound or unbound. You
can distinguish those by calling the Var's ".isBound" method.
If there is a binding, it may be a root binding or a thread-local binding. From your spec it doesn't look like you care about that distinction.
From these building blocks, and with that terminology in place, it may be possible for you to implement the function you need. Please let me know how you make out.
--Steve
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