Much of the discussion seems to focus on how to distinguish between a variable
as a provider of a value and a variable as receiver of a matched value.
In normal Python syntax a variable in an expression provides a value, please
let’s keep that unchanged.
So it seems to me we should explicitly mark a variable to receive a matched
value.
I have seen ‘?’ suggested as a prefix to do this, ‘\’ would also do fine.
This would solve the single variable issue, too:
case foo:
matches the value of ‘foo’, while
case \foo:
matches anything and stores it in ‘foo’.
This would also mean
case Point(x=\x, y=\y):
should be used to obtain x and y from the Point instance.
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