Auto indexing improved for() loops

[P Holder]

I'm participating in Advent of Code 2023 using Java.  It reminds me how I
frequently wish I could have an index in a modern for loop without having
to resort to using the old/traditional for loop.  Now that the JEP 456
Unnamed Variables & Patterns is progressing nicely I can see how it could
be used implicitly to grant my wish.

Instead of writing:

final String[] strings = getSomeStrings();
int index = 0;
for (final String str : strings)
{
  // use the str and the index
  index++;
}

and risking the chance I may forget to place the index++ ... I would rather
have something like:

final String[] strings = getSomeStrings();
for (int index, final String str : strings)
{
  // use the str and the index
}

where the new part "int index" is optional, and the compiler could treat it
like "int _" if not specified.  Of course it could also be long, one
assumes.

I do realize it's merely syntactic sugar and I do know how to write the
code I need, but it does surprise me the number of times I end up writing
old for loops simply because I could use the index, but otherwise know
doing it the modern way is cleaner and more expressive, if only I had the
index too.
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