On Fri, Jul 10, 2020 at 08:23:09AM -0400, Ricky Teachey wrote:
> My mind instantly went to the idea of using this syntax as a way write
> single line mathematical function definitions:
>
> f[x, y] = x + y
This won't work, because the right hand side will be evaluated first.
The above is legal syntax today, and roughly equivalent to:
value = x + y
index = (x, y)
f.__setitem__(index, value)
except of course no such local variables value and index are created.
But you can see why that cannot be used to define a function: the right
hand side is evaluated, and all your `__setitem__` method will see is
the value of x + y, not the fact that it is "x + y".
--
Steven
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