[Python-ideas] Updating PEP 315: do-while loops
larry at hastings.org
Sun Apr 26 05:39:05 CEST 2009
Chris Rebert wrote:
> I don't see why the if-as-suffix is needed when we already have a
> one-liner for such situations (e.g.):
> if i != '1': break
> It's much more uniform and only one character longer.
I certainly see your point. Let me take it a step further: the "do: ...
while <condition>" construct isn't needed, given that it's already
expressible with "while True: ... if not <condition>: break".
It's true, "break if <condition>" and "continue if <condition>" are
redundant constructs. But this debate is over refining our syntactic
sugar--charting what is arguably a redundant construct. Therefore
proposing redundant constructs for the sake of clarity is on the table.
I think "break if <condition>" and "continue if <condition>" enhance
readability; they make the control flow pop out at you more than "if
<condition>: break" and "if <condition>: continue" do. "break if" and
"continue if" have the advantage of following established Python
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