[swift-evolution] [Review] SE-0122: Use colons for subscript declarations

[Garth Snyder]

+1

I prefer the current syntax from a subjective and readability perspective.

However, the current notation of -> Type being used to declare an input parameter to set {} just strikes me as weird and wrong. The symbol -> means “returns a” or “yields”. Since we’re declaring a type that might be either inbound or outbound, the neutral : is more appropriate.

I didn’t initially think this was all that important to address, but having considered it more, I agree that it’s a wart worth excising and is worth the disruption for users.

Garth

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