Implement ExactSizeIterator for remaining core Iterators where applicable#21453

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bors merged 3 commits intorust-lang:masterfrom

Stebalien:exactsize

Jan 23, 2015

Commits on Jan 21, 2015

Implement ExactSizeIterator for remaining core Iterators where applicable.
Stebalien
committed
Use the default `len` implementation in ExactSizeIterator impls
Stebalien
committed

Commits on Jan 22, 2015

Add test cases for ExactSizeIterator impls
Stebalien
committed