RFC for `while let` statement#214

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aturon merged 3 commits intorust-lang:masterfrom

lilyball:while_let

Oct 1, 2014

Commits on Aug 27, 2014

RFC for `while let` statement
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Commits on Aug 28, 2014

Update `while let` with pattern alternatives.
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Commits on Aug 29, 2014

s/BODY/EXPR/
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