I made an RFC - https://github.com/rust-lang/rfcs/pull/20
On Wed, Mar 26, 2014 at 9:25 AM, Nick Cameron <[email protected]> wrote: > The removal was in https://github.com/mozilla/rust/pull/4660, but there > is no discussion of why. Do you recall who promoted the change? > > I fear it makes the syntax simpler, but the language more complex and > surprising. > > > On Wed, Mar 26, 2014 at 6:00 AM, Patrick Walton <[email protected]>wrote: > >> On 3/24/14 11:46 PM, Nick Cameron wrote: >> >>> Currently we forbid bounds on type parameters in structs, enums, and >>> types. So the following is illegal: >>> >>> struct S<X: B> { >>> f: ~T<X>, >>> } >>> >> >> IIRC Haskell allows bounds on type parameters (and we did once too), but >> I heard that considered deprecated and not preferred. I don't recall the >> exact reasons, but that's why we removed the feature (and also just for >> language simplicity). >> >> Patrick >> >> _______________________________________________ >> Rust-dev mailing list >> [email protected] >> https://mail.mozilla.org/listinfo/rust-dev >> > >
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