Auto merge of #34575 - cgswords:tstream, r=nrc

Introducing TokenStreams and TokenSlices for procedural macros

This pull request introduces TokenStreams and TokenSlices into the compiler in preparation for usage as part of RFC 1566 (procedural macros).

r? @nrc
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bors 2016-07-07 17:58:31 -07:00 committed by GitHub
commit 182bcdbea1

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