Use lifetime contravariance to elide more lifetimes in core+alloc+std#59056

Merged

bors merged 1 commit intorust-lang:masterfrom

scottmcm:even-fewer-lifetimes

Mar 13, 2019

Commits on Mar 10, 2019

Use lifetime contravariance to elide more lifetimes in core+alloc+std
scottmcm
committed