On 08/07/2020 16:15, MRAB wrote:
On 2020-07-08 03:08, Rob Cliffe via Python-Dev wrote:
Why not use '=' to distinguish binding from equality testing:
case Point(x, =y): # matches a Point() with 2nd parameter equal to
y; if it does, binds to x.
This would allow a future (or present!) extension to other relative
operators:
case Point(x, >y):
(although the syntax doesn't AFAICS naturally extend to specifying a
range, i.e. an upper and lower bound, which might be a desirable thing
to do.
Perhaps someone can think of a way of doing it).
Whether
case =42:
case 42:
would both be allowed would be one issue to be decided.
In Python, '=' is assignment and '==' is equality. Using '=' for
equality could lead to confusion.
Fair enough. In that case use `==` instead:
case Point(x, ==y): # if matches a Point with the given y-value,
bind to x
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