On Thu, Nov 20, 2014 at 10:01 AM, Nick Coghlan ncoghlan@gmail.com wrote:
list(x for x in range(10) if x < 5 or return)
[0, 1, 2, 3, 4]
I'd be concerned about the confusion engendered by 'return' having totally different semantics within very small regions, e.g. we'd have
def takewhile(iterable, pred): return (x for x in iterable if pred(x) or return)
Esp. because normally 'return' is very powerful -- right now any mention of that token anywhere in a function body jumps out of the entire function, so you really have to scan for them actively when trying to understand a function's flow control.
Not a big fan of a flow control expression in general, really; yield expressions are kinda flow-controlly, but they just pause execution, they don't disrupt the logical through-line of a block of code.
-n