Add the support of the LPOS command

[JoverZhang]

Close #1528

[enjoy-binbin]

i see we already have a pending #1571, what's the status over there?

[torwig]

@enjoy-binbin That issue was assigned to another person by me (almost 2 months ago) and I think @JoverZhang just took the task and did it.

[JoverZhang]

Oh, Sorry, I don't know the status over there. Can I merge it?

[git-hulk]

I guess it's fine since #1571 is lack active for more than one month, so it makes sense if others took over the task.

[JoverZhang]

@torwig Thank you for your review and feedback. I'll make the necessary changes.

[JoverZhang]

I did some stupid things with my GitHub App.

[git-hulk]

@JoverZhang That's fine, you have done well in test coverage. You can choose to add the Go test cases only if conditions can be covered, and GoogleTest for which cannot be tested through the Go test. But now is good and you don't need to change anything.

[JoverZhang]

@git-hulk Thanks, I get it now. No wonder I also think there was duplicate coverage.

[PragmaTwice]

Thanks for your contribution!

LGTM at first glance.

[torwig]

LGTM