IIFEs - Inline Closures do not execute but give a compiler error

http://en.wikipedia.org/wiki/Immediately-invoked_function_expression

This should work in CFML:

(function(){
writeOutput("hi");
})();

Where "work" means it outputs hi. This is a very contrived example, but being able to memory space blocks of code is quite handy in other languages, and that CFML has function expressions but NOT IIFEs seems a bit half-implemented.

See equiv ColdFusion ticket: https://bugbase.adobe.com/index.cfm?event=bug&id=3950736