Add scanner and parser support for new >>> operator

This adds support for the new >>> operator as detailed in
https://github.com/dart-lang/language/blob/master/accepted/future-releases/constant-update-2018/feature-specification.md#new-operators

Tracking issue: https://github.com/dart-lang/language/issues/60

Enable support by setting AbstractScanner.enableGtGtGt = true

Change-Id: I8e7d2fb341971452d8e05d734a1de612880fef5e
Reviewed-on: https://dart-review.googlesource.com/c/85421
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
Commit-Queue: Dan Rubel <danrubel@google.com>
7 files changed
tree: 5b35a30b83359e479ed181bf0d133c55ceb5f40a
  1. .github/
  2. build/
  3. client/
  4. docs/
  5. pkg/
  6. runtime/
  7. samples/
  8. samples-dev/
  9. sdk/
  10. tests/
  11. third_party/
  12. tools/
  13. utils/
  14. .clang-format
  15. .gitattributes
  16. .gitconfig
  17. .gitignore
  18. .gn
  19. .mailmap
  20. .packages
  21. .vpython
  22. AUTHORS
  23. BUILD.gn
  24. CHANGELOG.md
  25. codereview.settings
  26. CONTRIBUTING.md
  27. dartdoc_options.yaml
  28. DEPS
  29. LICENSE
  30. PATENTS
  31. PRESUBMIT.py
  32. README.dart-sdk
  33. README.md
  34. WATCHLISTS
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