Ixrec

Feature Name: dyn-trait-syntax
Start Date: 2017-??-??
RFC PR: (leave this empty)
Rust Issue: (leave this empty)

Summary

Introduce a new dyn Trait syntax for trait objects using a contextual dyn keyword, and deprecate "bare trait" syntax for trait objects. In a future checkpoint, dyn will become a proper keyword and bare trait syntax will be removed.

	C:\faster-sort>rustup run nightly cargo bench
	Compiling libc v0.2.17
	Compiling rand v0.3.14
	Compiling faster-sort v0.1.0 (file:///C:/faster-sort)
	warning: unused import: `std::cmp`, #[warn(unused_imports)] on by default
	--> src\lib.rs:8:5
	\|
	8 \| use std::cmp;
	\| ^^^^^^^^