rust-lang/rfcs — pull request #490 by P1start (2014-11-29 11:00:01+00:00)
Title: RFC: Change DST syntax to `T: Sized?`

Change the syntax for dynamically sized type parameters from `Sized? T` to `T: Sized?`, and change the syntax for traits for dynamically sized types to `trait Foo: Sized?`. Extend this new syntax to work with `where` clauses.

cc #357

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