RFR: JDK-8285932 Implementation of JEP-430 String Templates (Preview) [v7]

[Jan Lahoda]

On Mon, 31 Oct 2022 20:11:34 GMT, Jim Laskey <jlaskey at openjdk.org> wrote:

>> Enhance the Java programming language with string templates, which are similar to string literals but contain embedded expressions. A string template is interpreted at run time by replacing each expression with the result of evaluating that expression, possibly after further validation and transformation. This is a [preview language feature and API](http://openjdk.java.net/jeps/12).
>
> Jim Laskey has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Add @SafeVarargs declarations

src/java.base/share/classes/java/util/FormatConcatItem.java line 51:

> 49:  */
> 50: @PreviewFeature(feature=PreviewFeature.Feature.STRING_TEMPLATES)
> 51: public sealed interface FormatConcatItem

I wonder why is this a public API - is there some way to use it from the client code?

Note that in named modules, the permitted subtypes don't need to be in the same package, so if this is not needed in the API, it probably can be moved into a non-API package.

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PR: https://git.openjdk.org/jdk/pull/10889