Simple tail calls

[Michael Day]

Hi Peter,

> I created a Mozilla ticket in response and one of my comments there
> talks about the arguments.caller problem

arguments.caller is not defined by ES 3.0, right?

I think this feature is not helpful for efficient implementations, and 
it would be best to deprecate it.

> I'm all for tail calls. I'd like to see implicit tail calls. Implicit
> tail calls would be necessary if tail calls are used in lambdas as
> there is no "return" statement in a lambda.

Personally I would prefer to have return statements in lambdas as well. 
Perhaps it is worth making a combined lambda + tail call proposal, given 
that the two features work well together.

Cheers,

Michael

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