Allow soft keywords open and infix under -Xsource:3#9580
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lrytz merged 1 commit intoscala:2.13.xfrom Apr 21, 2021
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There's a change of semantics here, this used to run the Is there an easy way to issue an error here? Or is it exotic enougth to be ignored? |
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I'd say that's an inevitable semantic change, emitting a warning or error would be very tricky since it would require both token-level information and name resolution |
Since everything is open and can be used infix by default in Scala 2, these keywords are no-op, but they're useful for cross-compiling with a future version of Scala 3 where they will be required in some cases (with Scala 3.0 they're only required to avoid warnings under `-source future`). See https://dotty.epfl.ch/docs/reference/changed-features/operators.html and http://dotty.epfl.ch/docs/reference/other-new-features/open-classes.html for details.
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Since everything is open and can be used infix by default in Scala 2,
these keywords are no-op, but they're useful for cross-compiling with a
future version of Scala 3 where they will be required in some
cases (with Scala 3.0 they're only required to avoid warnings under
-source future).See https://dotty.epfl.ch/docs/reference/changed-features/operators.html
and http://dotty.epfl.ch/docs/reference/other-new-features/open-classes.html
for details.