Proposed keyword to transfer control to another function
ethan at stoneleaf.us
Fri Jul 17 06:44:30 CEST 2015
On 07/16/2015 04:46 PM, Chris Angelico wrote:
> # derived from Paul Rubin's example
> def quicksort(array, start, end):
> midp = partition(array, start, end)
> if midp <= (start+end)//2:
> quicksort(array, start, midp)
> transfer quicksort(array, midp+1, end)
> quicksort(array, midp+1, end)
> transfer quicksort(array, start, midp)
> def count_usage(func):
> def wrapper(*args, **kwargs):
> wrapper.usage += 1
> transfer func(*args, **kwargs)
> wrapper.usage = 0
> return wrapper
> * Evaluate the function and all its arguments, exactly as per a
> current function call.
> * Leaving them on the stack, remove the current call frame and dispose
> of all its objects.
> * Finally, construct a new stack frame for the target function and
> transfer control to it.
> In effect, "transfer f()" is equivalent to "return f()", except that
> the current function finishes before the target is entered.
Sounds cool! Code it up and let us know how it goes. :)
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