Why does (.foo (new Bar)) use a different method invocation mechanism than (def bar (new Bar)) (.foo bar)?

I've been trying to understand exactly how these two statements are evaluated by tracing execution through Compiler.java, Reflector.java, etc of tag 1.2.0. The second form - (.foo bar), expanded to (. bar foo) - eventually calls Reflector.invokeNoArgInstanceMember. The first form - (.foo (new

Re: Why does (.foo (new Bar)) use a different method invocation mechanism than (def bar (new Bar)) (.foo bar)?

2011/1/16 Robert Campbell rrc...@gmail.com: The second form - (.foo bar), expanded to (. bar foo) - eventually calls Reflector.invokeNoArgInstanceMember. For that form, the clojure compiler cannot infer the type of bar, and does not know which exact method (class + type signature) .foo