Hi Rob,
On 13/01/2021 12:18 pm, Rob Cliffe wrote:
On 12/01/2021 15:53, Mark Shannon wrote:
In master we convert `if x: pass` to `pass` which is equivalent,
unless bool(x) has side effects the first time it is called. This is a
recent change.
Can you please confirm that this optimisation ONLY applies to bare
names, i.e. NOT
if x(): pass
if x.y: pass
if x+y: pass
The optimization doesn't apply to the expression, but the test.
The optimizer (might) transform
if x+y: pass
to
x+y
But the expression is still evaluated.
Sorry for the confusion, I should have been clearer in my example.
It is the call to `bool()` that *might* be eliminated.
Cheers,
Mark.
Thanks
Rob Cliffe
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