Wonder the scope of the output of the vim command :tags

Question

When I invoke :tags command in vim, the result varies depending on vim windows. So I wonder the scope of the result of the vim command :tags. I guess it would be one of below:

1. g: Global
2. s: Script-local (like "static" in C)
3. l: Function-local
4. a: Function argument
5. v: Vim internal
6. b: Buffer local
7. w: Window local
8. t: Tab local

The above is from this

Answer 1

:help :tags prints the current state of the :help tag-stack, which is indeed window-local (tough the documentation is sadly not explicit about it).

But the scopes you listed in your question only matter for variables. They are pretty much meaningless in the context of :tags, and thus irrelevant.

That said, if you want to save the tag stack of the current window to a variable, then it makes the most sense to make that variable window-local with the appropriate scope:

let w:tag_stack = gettagstack()

Other than that, scopes are irrelevant.