RFR: 8264565: Templatize num_arguments() functions of DCmd subclasses [v2]

[Ioi Lam]

On Fri, 2 Apr 2021 16:46:50 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

>> Ioi Lam has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains four additional commits since the last revision:
>> 
>>  - Merge branch 'master' into 8264565-templatize-dcmd-num-arguments
>>  - removed remaining boilerplate num_arguments() functions
>>  - DebugOnCmdStartDCmd does not need to subclass from DCmdWithParser
>>  - 8264565: Templatize num_arguments() functions of DCmd subclasses
>
> Wow cool and nice.

Thanks @coleenp and @dholmes-ora for the review.

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PR: https://git.openjdk.java.net/jdk/pull/3312