On 04/12/2019 23:41:19, Andrew Barnert via Python-ideas wrote:
On Dec 4, 2019, at 12:14, Mike Miller <python-id...@mgmiller.net> wrote:
On 2019-12-04 11:05, David Mertz wrote:
I've often wanted named loops. I know approaches to this have been proposed
many times, and they all have their own warts. E.g. an ad hoc pseudo code that
may or may not match any previous proposal:
for x in stuff as outer:
for y in other_stuff as inner:
...
if cond:
break outer
But we all manage without it.
+1 Nice, find myself with that problem about once a year and it is annoying to
code around
If you want to change this from an aside to a real proposal, it’s probably
worth starting a new thread (and providing a real-life use case—if we all run
into it once a year, many people probably won’t remember exactly what it looked
like when they last ran into it, and how much their workaround bothered them).
My experience in this area:
I've sometimes found myself wanting to write
break break
to break out of 2 loops at once
and probably
break break break
to break out of 3 loops. (Any more and the code starts to look pretty
ugly - but any feature can be abused.)
This could lead (in complicated examples) to code would be harder to
maintain than if it used named loops, but
it is concise
it is backward-compatible
it could AFAIK be checked at compile time (for more "break"s than
enclosing loops)
it does not require a new keyword
IMO it would handle a large majority of use cases.
Rob Cliffe
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