[Python-ideas] Null coalescing operators
Sven R. Kunze
srkunze at mail.de
Sat Sep 19 01:44:31 CEST 2015
On 19.09.2015 01:18, Erik wrote:
> Apologies for the self-reply. I just wanted to clarify a couple of
> On 18/09/15 23:56, Erik wrote:
>> If the foo operator uses the magic method "__foo__" to mean "return an
>> object to be used in place of the operand should it be considered ...
>> false? [or some other definition - I'm not sure]"
> Not "false", I think. The "foo" operator is meant to mean "I will go
> on to use the resulting object in any way imaginable and it must cope
> with that and return a value from any attempts to use it that will
> generally mean 'no'" (*).
>> If that was a postfix operator which has a high precedence, then:
>> bar = foo?
>> and the original syntax suggestion:
>> bar = foo?.isoformat()
> Which is clearly wrong - the first part should be:
> baz = foo?
> bar = baz.isoformat()
> (*) Should we call the operator "shrug"?
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