Queries: is it possible to match any number of tree levels?

[przepompownia]

Inspiration: how to match a call expression that consist of the chain of methods, but with the cursor at the start of such expression?

Example from PHP

        User::find()
            ->joinWith('xxx')
            ->someOtherMethod()
            ->all();

and its part of the tree that needs matching

     (member_call_expression) [19:9-22:19]
      object: (member_call_expression) [19:9-21:31]
       object: (member_call_expression) [19:9-20:29]
        object: (scoped_call_expression) [19:9-20]

I have read the basics from https://tree-sitter.github.io/tree-sitter/using-parsers#query-syntax but not found any syntax to express it. I managed to match only concrete number of levels with e.g.

(member_call_expression 
  ([
	(scoped_call_expression)
	(member_call_expression)
	])?
) @call.outer

[theHamsta]

No. That's not possible at the moment. You could use #has-ancestor? which can walk up arbitrarily many objects up in the hierarchy, but at some performance cost.

[przepompownia]

@theHamsta thanks to your hint I looked around where #has-ancestor? and other predicates can be defined at the Neovim and its extensions level and also found the help text under treesitter-predicates.

After many tries and errors, I ended up with

[
 (member_call_expression)
 (scoped_call_expression)
] @_class_call_expression

(
  (member_call_expression) @_mc
  (#has-ancestor? @_class_call_expression @_mc)
) @call.outer

but it seems to stop at the shortest chain i.e like in the two-level example above.