How do you know if the "enumeration was aborted"? The calling code
gets back an IEnumerator and is free to call or not call MoveNext on
it any number of times. Suppose I do this:
def Generate():
try:
yield 42
yield 4242
yield 424242
ensure:
Dispose()
def Consume():
for index, value in zip(range(2), Generate()):
print "${index} => ${value}"
This will only consume only the first two yields (or even just the
first one, I'm never sure about range()...). When, if at all, will the
internal Dispose() code be called?
On Jan 22, 10:15 pm, Daniel Grunwald <
dan...@...> wrote:
> Remember the cases in which the "ensure" code should run:
> 1) when control flow in the generator normally leaves the "try" block
> (but not when control flow leaves the "try" block due to "yield" being
> implemented as "return Yield(...)")
> 2) when the generator code causes an exception in the "try" block
> 3) when the enumeration is aborted (due to "break" or exception in the
> for loop) - in this case, Dispose() is called on the enumerator.
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