Add Iterator trait TrustedLen to enable better FromIterator / Extend#37306

Merged

bors merged 9 commits intorust-lang:masterfrom bluss:trusted-len

Nov 4, 2016

+146-60

Commits on Oct 21, 2016

Commits on Oct 26, 2016

Commits on Nov 4, 2016

Link the tracking issue for TrustedLen
bluss
committed