RFR: 7903132: Replace casts with type test pattern

[Maurizio Cimadamore]

On Thu, 24 Mar 2022 22:48:41 GMT, Ethan McCue <duke at openjdk.java.net> wrote:

> Replaces a handful of casts following type tests with the equivalent pattern syntax.
> 
> I cannot create a matching issue, as I do not have an account on the bug tracker.

Are you in a position to file a JBS issue for this? We're happy to sponsor - the problem here is that the subject of the PR has to be in the form:

NNNNNNN: <JBS issue subject>

For it to go through. If you are having issues, please let us know and we'll try to find an alternate arrangement.

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PR: https://git.openjdk.java.net/jextract/pull/5