On Tue, 26 Sep 2023 12:32:37 GMT, Adam Sotona <asot...@openjdk.org> wrote:

>> Classfile API is an internal library under package `jdk.internal.classfile` 
>> in JDK 21.
>> This pull request turns the Classfile API into a preview feature and moves 
>> it into `java.lang.classfile`.
>> It repackages all uses across JDK and tests and adds lots of missing Javadoc.
>> 
>> This PR goes in sync with 
>> [JDK-8308754](https://bugs.openjdk.org/browse/JDK-8308754): Class-File API 
>> (Preview) (CSR)
>> and [JDK-8280389](https://bugs.openjdk.org/browse/JDK-8280389): Class-File 
>> API (Preview) (JEP).
>> 
>> Online javadoc is available at: 
>> https://cr.openjdk.org/~asotona/JDK-8308753-preview/api/java.base/java/lang/classfile/package-summary.html
>> 
>> In addition to the primary transition to preview, this pull request also 
>> includes:
>> - All Classfile* classes ranamed to ClassFile* (based on JEP discussion).
>> - A new preview feature, `CLASSFILE_API`, has been added.
>> - Buildsystem tool required a little patch to support annotated modules.
>> - All JDK modules using the Classfile API are newly participating in the 
>> preview.
>> - All tests that use the Classfile API now have preview enabled.
>> - A few Javac tests not allowing preview have been partially reverted; their 
>> conversion can be re-applied when the Classfile API leaves preview mode.
>> 
>> Despite the number of affected files, this pull request is relatively 
>> straight-forward. The preview version of the Classfile API is based on the 
>> internal version of the library from the JDK master branch, and there are no 
>> API features added.
>> 
>> Please review this pull request to help the Classfile API turn into a 
>> preview.
>> 
>> Any comments are welcome.
>> 
>> Thanks,
>> Adam
>
> Adam Sotona has updated the pull request incrementally with one additional 
> commit since the last revision:
> 
>   PreviewFeature annotated with JEP 457

make/jdk/src/classes/build/tools/module/GenModuleInfoSource.java line 476:

> 474:                         throw parser.newError("is malformed");
> 475:                     }
> 476:                 } else if (token.equals("import")) {

why is this change necessary?

src/java.base/share/classes/java/lang/classfile/AnnotationElement.java line 34:

> 32: import jdk.internal.javac.PreviewFeature;
> 33: 
> 34: /**

shouldn't we have the preview header applied to all these compilation units?:


{@preview Associated with pattern matching for instanceof, a preview feature of 
the Java language.

-------------

PR Review Comment: https://git.openjdk.org/jdk/pull/15706#discussion_r1341847954
PR Review Comment: https://git.openjdk.org/jdk/pull/15706#discussion_r1341855569

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