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Split left-shift into two less-than for properly parsing associated type syntax. #20409

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mark3982
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@mark3982 mark3982 commented Jan 1, 2015

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@rust-highfive
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Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @nikomatsakis (or someone else) soon.

If any changes to this PR are deemed necessary, please add them as extra commits. This ensures that the reviewer can see what has changed since they last reviewed the code. The way Github handles out-of-date commits, this should also make it reasonably obvious what issues have or haven't been addressed. Large or tricky changes may require several passes of review and changes.

Please see CONTRIBUTING.md for more information.

@sfackler
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sfackler commented Jan 1, 2015

The commit should be marked with [breaking-change] along with a quick explanation of how to fix the parse errors that might pop up in downstream code.

@nikomatsakis
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This looks good. r+ with a comment plus a change to the commit to mention [breaking-change] as @sfackler suggested. Please ping me (or eddyb) on IRC for r+ after that's done.

…ype syntax.

  [breaking-change]

  With this change any left-shift operator after an identifier such as
  `as`  will be incorrectly interpreted. To handle this you must change:
      34 as uint << 3
  To:
      (34 as uint) << 3
@huonw
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huonw commented Jan 2, 2015

Is this a dupe of #20154?

@alexcrichton
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Yes I think this was a dupe of #20154 (which is now merged), thanks regardless @kmcguire3413!

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6 participants