I could be wrong, but I believe that symbols and vars are separate 
entities.  

f1 is a symbol which is associated with a var that contains the function. 
 When you evaluate the symbol 'f1, it looks at the association to find the 
var.

It looks like, when you define f2 and f3 to take on those variables, the 
symbols 'f2 and 'f3 get associated with the same var as 'f1.  So I don't 
think there's any chaining together.  They're just associated with a single 
var.

Again, I could be wrong, but I believe this is how it works.


On Sunday, 26 May 2013 17:33:24 UTC-4, Simon Katz wrote:
>
> If I define a chain of vars like this...
>
> (defn f1 [] 42) 
>
> (def f2 #'f1) 
>
> (def f3 #'f2) 
>
>    ...when I call f3 the chain of vars is followed:
>
> (f3) ; => 42 
>
>  Out of curiosity, where is this following-the-chain defined?
>
> I looked at http://clojure.org/evaluation which simply says "The result 
> of the evaluation of the operator is [...] cast to IFn (the interface 
> representing Clojure functions), and invoke() is called on it".
>
> --Simon
>

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