helix-plus/runtime/queries/elixir/textobjects.scm

; Function heads and guards have no body at all, so `keywords` and `do_block` nodes are both optional
((call
   target: (identifier) @_keyword
   (arguments
     [
       (call
         (arguments (_)? @parameter.inside))
       ; function has a guard
       (binary_operator
         left:
           (call
             (arguments (_)? @parameter.inside)))
     ]
     ; body is "do: body" instead of a do-block
     (keywords
       (pair
         value: (_) @function.inside))?)?
   (do_block (_)* @function.inside)?)
 (#match? @_keyword "^(def|defdelegate|defguard|defguardp|defmacro|defmacrop|defn|defnp|defp)$")) @function.around

(anonymous_function
  (stab_clause right: (body) @function.inside)) @function.around

((call
   target: (identifier) @_keyword
   (do_block (_)* @class.inside))
 (#match? @_keyword "^(defmodule|defprotocol|defimpl)$")) @class.around

((call
  target: (identifier) @_keyword
  (arguments ((string) . (_)?))
  (do_block (_)* @test.inside)?)
 (#match? @_keyword "^(test|describe)$")) @test.around

(comment)+ @comment.around @comment.inside