On Oct 3, 2005, at 1:53 AM, Piet Delport wrote:
For generators written in this style, "yield" means "suspend execution of the current call until the requested result/resource can be provided", and "return" regains its full conventional meaning of "terminate the current call with a given result".
The simplest / most straightforward implementation would be for "return Foo" to translate to "raise StopIteration, Foo". This is consistent with "return" translating to "raise StopIteration", and does not break any existing generator code.
(Another way to think about this change is that if a plain StopIteration means "the iterator terminated", then a valued StopIteration, by extension, means "the iterator terminated with the given value".)
It sounds like a nice idea to me. Of course, it is only useful to functions calling ".next()" explicitly; in something like a for loop, the return value would just be ignored. James