Hi, This is a continuation of Joe's patch from here: https://mail.openjdk.java.net/pipermail/compiler-dev/2019-June/013498.html
APIs associated with preview features are split into two groups: essential and non-essential. These are marked with an JDK-internal annotation, PreviewFeature, and a tag in the javadoc, @preview. The javac follows the PreviewFeature annotation, and produces either warnings or errors for the usages of such APIs. For the @preview tag, there is a taglet in the JDK build that adds the content of the tag into the documentation. The first part of the @preview's text goes into the summary, the second part goes into the detailed description.
For build, a tricky problem is that the jdk.compiler module uses the PreviewFeature annotation as well, but that is not in the bootstrap JDK. So, for the intermediate langtools build, the PreviewFeature annotation is copied from java.base.
Proposed webrev: http://cr.openjdk.java.net/~jlahoda/8226585/webrev.00/ Javadoc with the change: http://cr.openjdk.java.net/~jlahoda/8226585/docs.00/api/index.html See for example: http://cr.openjdk.java.net/~jlahoda/8226585/docs.00/api/java.base/java/lang/String.html http://cr.openjdk.java.net/~jlahoda/8226585/docs.00/api/jdk.compiler/com/sun/source/tree/CaseTree.html JBS: https://bugs.openjdk.java.net/browse/JDK-8226585 CSR: https://bugs.openjdk.java.net/browse/JDK-8231411 Feedback is welcome! Thanks, Jan