2017-02-19 22:59 GMT+03:00 Matthew Johnson <[email protected]>:
On Feb 19, 2017, at 1:32 PM, Anton Zhilin <[email protected]> wrote:
>
> Now that I think about it, generic throws does not exactly cover rethrows.
> Firstly, rethrows has semantic information that function itself does not
> throw—it would be lost.
>
> Can you elaborate further on what you mean by this?
>
protocol Default { init() }
func exec(f: () throws -> Void) rethrows
{
try f()
throw MyError() // error because of rethrows
}
func exec<E>(f: () throws(E) -> Void) throws(E)
where E: Error & Default
{
try f()
throw E() // okay
}
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