[swift-evolution] Remove Failable Initializers
dabrahams at apple.com
Mon Mar 7 14:35:10 CST 2016
on Sat Mar 05 2016, Brent Royal-Gordon <swift-evolution at swift.org> wrote:
> Ultimately, the reason throwing isn't as efficient as optionals is
> simply that throwing communicates more data. And it communicates more
> data precisely *because* it is more expressive, because it supports
> many error cases instead of just one. Ultimately you're running up
> against information theory here, and the optimizer can't change
> fundamental laws of mathematics.
It's not just that it communicates more data, but also that it does so
with type erasure.
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