Le 19/12/2012 16:45, Brandon Benvie a écrit :
Another benefit is in not polluting the stack trace for actual errors,
which is actually a pretty big annoyance now for control flow
try...catch wrappers like for of shims.
This is making me realize that maybe the language needs a third way to
end a frame. This third way wouldn't propagate as throw does but would
be used only as a communication mechanism between the engine and a
user-defined function.
Maybe "break"?
In an iterator, one would express "break StopIteration" to stop the
iteration. In a .forEach, one would write "break StopIteration" to stop
the iteration.
What I'm describing might be violently backward incompatible (and
doesn't behave well inside switch statement and in cases where there are
labels), but I find the thought experiment interesting.
David
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