[swift-build-dev] Should Version be StringLiteralConvertible?

[Max Howell]

Can you provide a use case that demonstrates the danger?

I can only imagine situations where the Package.swift is invalid and thus `swift build` simply errors out.  No data is lost, no work is lost. Just time.

> On Dec 30, 2015, at 1:16 PM, Ling Wang via swift-build-dev <swift-build-dev at swift.org> wrote:
> 
> Because Version.init?(_ characters:) is really failable this code is very dangerous:
> extension Version: StringLiteralConvertible {
>    public init(stringLiteral value: String) {
>        self.init(value.characters)!
>    }
> 
> Is the convenience worth it?
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