You wouldn't probably use this for each and every method, but what it gives you is Go-style duck typing.
Sure you can define a trait, but what if the struct you to pass to your function does not implement it? I guess you would have to implement a wrapper around it manually then. -- Ziad On Sun, Mar 23, 2014 at 4:37 AM, Matthieu Monrocq < [email protected]> wrote: > I would note that Rust macros are actually working with structural typing: > the expanded macro cannot be compiled unless the expressions/statements it > results in can be compiled. > > Regarding Scala here, it seems a weird idea to ask that each and every > method should copy+paste the interface. We all know the woes of duplication. > > Instead, you can define a Trait (even if for a single function) and it'll > just work; and when you add a second function you will be able to re-use > the same trait. > > > On Sun, Mar 23, 2014 at 11:37 AM, Liigo Zhuang <[email protected]>wrote: > >> IMO, this is bad. >> 2014年3月23日 下午6:34于 "Ziad Hatahet" <[email protected]>写道： >> >>> Hi all, >>> >>> Are there any plans to implement structural typing in Rust? Something >>> like this Scala code: http://en.wikipedia.org/wiki/Duck_typing#In_Scala >>> >>> >>> _______________________________________________ >>> Rust-dev mailing list >>> [email protected] >>> https://mail.mozilla.org/listinfo/rust-dev >>> >>> >> _______________________________________________ >> Rust-dev mailing list >> [email protected] >> https://mail.mozilla.org/listinfo/rust-dev >> >> >
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