RFR: JDK-8250768: javac should be adapted to changes in JEP 12 [v3]
jlahoda at openjdk.java.net
Fri Oct 23 16:17:58 UTC 2020
> This is an update to javac and javadoc, to introduce support for Preview APIs, and generally improve javac and javadoc behavior to more closely adhere to JEP 12.
> The notable changes are:
> * adding support for Preview APIs (javac until now supported primarily only preview language features, and APIs associated with preview language features). This includes:
> * the @PreviewFeature annotation has boolean attribute "reflective", which should be true for reflective Preview APIs, false otherwise. This replaces the existing "essentialAPI" attribute with roughly inverted meaning.
> * the preview warnings for preview APIs are auto-suppressed as described in the JEP 12. E.g. the module that declares the preview API is free to use it without warnings
> * improving error/warning messages. Please see  for a list of cases/examples.
> * class files are only marked as preview if they are using a preview feature.  also shows if a class file is marked as preview or not.
> * the PreviewFeature annotation has been moved to jdk.internal.javac package (originally was in the jdk.internal package).
> * Preview API in JDK's javadoc no longer needs to specify @preview tag in the source files. javadoc will auto-generate a note for @PreviewFeature elements, see e.g.  and  (non-reflective and reflective API, respectively). A summary of preview elements is also provided . Existing uses of @preview have been updated/removed.
> * non-JDK javadoc is also enhanced to auto-generate preview notes for uses of Preview elements, and for declaring elements using preview language features .
> Please also see the CSR  for more information.
>  http://cr.openjdk.java.net/~jlahoda/8250768/JEP12-errors-warnings-v6.html
>  http://cr.openjdk.java.net/~jlahoda/8250768/jdk.javadoc.00/api/java.base/java/lang/Record.html
>  http://cr.openjdk.java.net/~jlahoda/8250768/jdk.javadoc.00/api/java.compiler/javax/lang/model/element/RecordComponentElement.html
>  http://cr.openjdk.java.net/~jlahoda/8250768/jdk.javadoc.00/api/preview-list.html
>  http://cr.openjdk.java.net/~jlahoda/8250768/test.javadoc.00/
>  https://bugs.openjdk.java.net/browse/JDK-8250769
Jan Lahoda has updated the pull request incrementally with two additional commits since the last revision:
- Using a more correct way to get URLs.
- Reflecting review comments.
- all: https://git.openjdk.java.net/jdk/pull/703/files
- new: https://git.openjdk.java.net/jdk/pull/703/files/be1d8651..caa4fd34
- full: https://webrevs.openjdk.java.net/?repo=jdk&pr=703&range=02
- incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=703&range=01-02
Stats: 41 lines in 7 files changed: 5 ins; 14 del; 22 mod
Fetch: git fetch https://git.openjdk.java.net/jdk pull/703/head:pull/703
More information about the compiler-dev