ts_query_ls/docs/quantification.md

Quantification Operators

You can match a repeating sequence of sibling nodes using the postfix + and * repetition operators, which work analogously to the + and * operators in regular expressions. The + operator matches one or more repetitions of a pattern, and the * operator matches zero or more.

For example, this pattern would match a sequence of one or more comments:

(comment)+

This pattern would match a class declaration, capturing all of the decorators if any were present:

(class_declaration
  (decorator)* @the-decorator
  name: (identifier) @the-name)

You can also mark a node as optional using the ? operator. For example, this pattern would match all function calls, capturing a string argument if one was present:

(call_expression
  function: (identifier) @the-function
  arguments: (arguments (string)? @the-string-arg))