Add support for Java 11 and 12 class files with "preview features" #743
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See JEP 12 (Preview Language and VM Features). I'm not aware of any preview features for JDK 11, however
--enable-preview
flag is available in JDK 11 EA. And as of today there is at least one preview feature scheduled for JDK 12 - JEP 325 (Switch Expressions).Before this change:
After this change: