[swift-users] LazyCollection.map()

[Dmitri Gribenko]

On Tue, Jun 28, 2016 at 3:37 PM, Aaron Bohannon via swift-users
<swift-users at swift.org> wrote:
> Does the code below have a well-defined behavior?

It invokes the eager map() that is available on Array.lazy.
Array.lazy is a collection, so it has an eager map() from the
Collection protocol.  The lazy map() does not accept a throwing
closure, so it does not match and the type checker chooses the eager
one.

Arguably, in non-generic context this code should not type check.

Dmitri

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