[swift-evolution] Disallowing unreachable code

[Brent Royal-Gordon]

> On Mar 29, 2017, at 8:11 AM, John McCall via swift-evolution <swift-evolution at swift.org> wrote:
> 
> I was suggesting that it would be a useful addition to the language, not that it
> necessarily needed new compiler support.

Personally, what I'd like to see is for the existing <#whatever#> placeholder syntax to be treated as an unimplemented() call. That probably *would* require compiler support, although fortunately we already parse this syntax into an EditorPlaceholderExpr.

-- 
Brent Royal-Gordon
Architechies

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