Thats true, my only concern with that is if the user disables that warning.
*___________________________________* *James⎥Lead Hustler* *[email protected] <[email protected]>⎥supmenow.com <http://supmenow.com>* *Sup* *Runway East * *10 Finsbury Square* *London* * EC2A 1AF * On 17 August 2016 at 02:49, Boris Wang <[email protected]> wrote: > Why the callback is special ? > > The compiler should has a warning for unused parameters of function. > > I think this is enough. More works should be leaved for a lint tool. > > > James Campbell via swift-evolution <[email protected]>于2016年8月17日 > 周三06:39写道： > >> I'm not sure about that last question, I guess someone who knows more >> about it than me could answer. >> >> *___________________________________* >> >> *James⎥Lead Hustler* >> >> *[email protected] <[email protected]>⎥supmenow.com >> <http://supmenow.com>* >> >> *Sup* >> >> *Runway East * >> >> *10 Finsbury Square* >> >> *London* >> >> * EC2A 1AF * >> >> On 16 August 2016 at 23:37, James Campbell <[email protected]> wrote: >> >>> @noescape is a hint that the callback will only be called once and >>> allows compiler to optimise, we may or may not be able to combine @required >>> functionality into that but it looks like it was rejected for now. >>> >>> @required is a compiler hint / sanity check to enforce that the callback >>> is actually called once by the developer. There is no focus on any compiler >>> enhancements other than that. >>> >>> >> >> _______________________________________________ >> swift-evolution mailing list >> [email protected] >> https://lists.swift.org/mailman/listinfo/swift-evolution >> >
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