RFR: JDK-8285932 Implementation of JEP 430 String Templates (Preview) [v28]

[Jim Laskey]

On Wed, 23 Nov 2022 15:57:54 GMT, Roger Riggs <rriggs at openjdk.org> wrote:

>> Kind of blows the whole concept of embedded expressions. This is one of those, just because you can, doesn't mean you should.
>
> ok, still what is the behavior if the format includes an index?
> The pattern scanner in FormatProcessor permits an index and does not cause an error.
> 
> Also, there might be a small benefit to using the existing compiled pattern in Formatter.java.  (make it package private and rename to uppercase).

Currently it issues an `MissingFormatArgumentException` which I guess could be confusing.  Changing to IllegalFormatFlagsException with a descriptive message.

Re: Pattern - I was originally trying to minimize changes to Formatter, but considering what I did change...

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