This phase rewrites pattern matches. FIXME: A more detailed explanation would be good.
A name given to the
Phase that can be used to debug the compiler. For
instance, it is possible to print trees after a given phase using:
$ ./bin/dotc -Xprint:<phaseNameHere> sourceFile.scala
List of names of phases that should precede this phase
List of names of phases that should have finished their processing of all compilation units before this phase starts
The transformation method