add textobject queries for elixir

book/src/generated/lang-support.md

@@ -15,7 +15,7 @@
 | edoc | ✓ |  |  |  |
 | eex | ✓ |  |  |  |
 | ejs | ✓ |  |  |  |
-| elixir | ✓ |  |  | `elixir-ls` |
+| elixir | ✓ | ✓ |  | `elixir-ls` |
 | elm | ✓ |  |  | `elm-language-server` |
 | erb | ✓ |  |  |  |
 | erlang | ✓ | ✓ |  | `erlang_ls` |

runtime/queries/elixir/textobjects.scm

@@ -0,0 +1,27 @@
+; 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|test|describe|setup)$")) @function.around
+
+(anonymous_function
+  (stab_clause right: (body) @function.inside)) @function.around
+
+((call
+   target: (identifier) @_keyword
+   (do_block (_)* @class.inside))
+ (#match? @_keyword "^(defmodule|defprotocol|defimpl)$")) @class.around