Feature

Is auto-tupling enabled?

Is captureChecking enabled for this compilation unit?

Is captureChecking enabled for any of the currently compiled compilation units?

Check that experimental compiler options are only set for snapshot or nightly compiler versions.

Is feature enabled by either a command line setting or an import?

Is feature enabled by by an import? This is the case if the feature is imported by a named import

 import owner.feature

and there is no visible nested import that excludes the feature, as in

 import owner.{ feature => _ }

Is feature enabled by by a command-line setting? The enabling setting is

 -language:<prefix>feature

where is the fully qualified name of owner, followed by a ".", but subtracting the prefix scala.language. at the front.

Handle language import import language.<prefix>.<imported> if it is one of the global imports pureFunctions or captureChecking. In this case make the compilation unit's and current run's fields accordingly.

Is pureFunctions enabled for this compilation unit?

Is pureFunctions enabled for any of the currently compiled compilation units?

If current source migrates to version, issue given warning message and return true, otherwise return false.