RFR: 8262328: Templatize JVMFlag boilerplate access methods [v3]

[Ioi Lam]

On Fri, 9 Apr 2021 16:17:53 GMT, Gerard Ziemski <gziemski at openjdk.org> wrote:

> Very nice! With all this reduction and "templatization" effort, soon we will be left with one line of a template code at this rate :-)
> 
> The only feedback I have is that I wish we could replace `int type_enum` with `FlagType type_enum`

Hi Gerard, thanks for the review. Replacing the int with enum will cause quite a bit of changes, so I would probably do that in a separate RFE.

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PR: https://git.openjdk.java.net/jdk/pull/3318