jlahoda opened a new pull request #1074: Have only one copy of TreeShims and copy it to java.hints and java.co… URL: https://github.com/apache/incubator-netbeans/pull/1074 …mpletion. Currently, we have a problem for supporting new Java language features: -our baseline API against which we build is JDK 9 -we would like to introduce features for the Java language features introduced since that. -even if we upgraded the baseline to JDK 11, that would still not allow to use the APIs from JDK 12 for modelling switch enhancements (JEP 325) -I don't think we want to move the baseline to JDK 12 yet (and when we will, there may already be need to support JDK 13, etc.) So, the imperfect solution foreseen so far was to use reflection to access the newer APIs. In order to isolate the actual features from the reflection, TreeShims were introduced providing nice methods to access the new API/data. I don't think the TreeShims should be an API - there's just a handful of uses, and when the baseline is moved to a future JDK version, these would be just unnecessary, but would need to be kept in the API "forever". So the idea was to have a copy of TreeShims in the modules that need them. And now, as we need the TreeShims in java.completion as well, it is probably time to stop to copy the class manually, but rather automatically. This is what this patch is doing - there is only one instance of TreeShims in java.source.base, which is copied at compile-time to java.hints and java.completion.
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