unified: add supertypes for various kinds of declarations

Hides a bunch of huge unions under (hopefully) sensible supertypes.

unified/extractor/tree-sitter-swift/grammar.js

@@ -84,7 +84,14 @@ if (tree_sitter_version_supports_emoji()) {
 
 module.exports = grammar({
   name: "swift",
-  supertypes: ($) => [$.expression, $.unannotated_type],
+  supertypes: ($) => [
+    $.expression,
+    $.unannotated_type,
+    $.global_declaration,
+    $.type_level_declaration,
+    $.local_declaration,
+    $.protocol_member_declaration,
+  ],
   conflicts: ($) => [
     // @Type(... could either be an annotation constructor invocation or an annotated expression
     [$.attribute],
@@ -1183,14 +1190,14 @@ module.exports = grammar({
     _local_statement: ($) =>
       choice(
         $.expression,
-        $._local_declaration,
+        $.local_declaration,
         $._labeled_statement,
         $.control_transfer_statement
       ),
     _top_level_statement: ($) =>
       choice(
         $.expression,
-        $._global_declaration,
+        $.global_declaration,
         $._labeled_statement,
         $._throw_statement
       ),
@@ -1298,7 +1305,7 @@ module.exports = grammar({
     ////////////////////////////////
     // Declarations - https://docs.swift.org/swift-book/ReferenceManual/Declarations.html
     ////////////////////////////////
-    _global_declaration: ($) =>
+    global_declaration: ($) =>
       choice(
         $.import_declaration,
         $.property_declaration,
@@ -1312,7 +1319,7 @@ module.exports = grammar({
         $.associatedtype_declaration,
         $.macro_declaration
       ),
-    _type_level_declaration: ($) =>
+    type_level_declaration: ($) =>
       choice(
         $.import_declaration,
         $.property_declaration,
@@ -1327,7 +1334,7 @@ module.exports = grammar({
         $.precedence_group_declaration,
         $.associatedtype_declaration
       ),
-    _local_declaration: ($) =>
+    local_declaration: ($) =>
       choice(
         alias($._local_property_declaration, $.property_declaration),
         alias($._local_typealias_declaration, $.typealias_declaration),
@@ -1598,7 +1605,7 @@ module.exports = grammar({
     _class_member_separator: ($) => choice($._semi, $.multiline_comment),
     _class_member_declarations: ($) =>
       seq(
-        sep1($._type_level_declaration, $._class_member_separator),
+        sep1($.type_level_declaration, $._class_member_separator),
         optional($._class_member_separator)
       ),
     _function_value_parameters: ($) =>
@@ -1666,7 +1673,7 @@ module.exports = grammar({
     throws_clause: ($) =>
       seq($._throws_keyword, "(", field("type", $.unannotated_type), ")"),
     enum_class_body: ($) =>
-      seq("{", repeat(choice($.enum_entry, $._type_level_declaration)), "}"),
+      seq("{", repeat(choice($.enum_entry, $.type_level_declaration)), "}"),
     enum_entry: ($) =>
       seq(
         optional($.modifiers),
@@ -1718,16 +1725,10 @@ module.exports = grammar({
     protocol_body: ($) =>
       seq("{", optional($._protocol_member_declarations), "}"),
     _protocol_member_declarations: ($) =>
-      seq(sep1($._protocol_member_declaration, $._semi), optional($._semi)),
-    _protocol_member_declaration: ($) =>
+      seq(sep1($.protocol_member_declaration, $._semi), optional($._semi)),
+    protocol_member_declaration: ($) =>
       choice(
-        alias(
-          seq(
-            $._bodyless_function_declaration,
-            optional(field("body", $.function_body))
-          ),
-          $.protocol_function_declaration
-        ),
+        $.protocol_function_declaration,
         $.init_declaration,
         $.deinit_declaration,
         $.protocol_property_declaration,
@@ -1735,6 +1736,11 @@ module.exports = grammar({
         $.associatedtype_declaration,
         $.subscript_declaration
       ),
+    protocol_function_declaration: ($) =>
+      seq(
+        $._bodyless_function_declaration,
+        optional(field("body", $.function_body))
+      ),
     init_declaration: ($) =>
       prec.right(
         seq(

unified/extractor/tree-sitter-swift/node-types.yml

@@ -56,6 +56,44 @@ supertypes:
     - tuple_expression
     - value_pack_expansion
     - value_parameter_pack
+  global_declaration:
+    - associatedtype_declaration
+    - class_declaration
+    - function_declaration
+    - import_declaration
+    - init_declaration
+    - macro_declaration
+    - operator_declaration
+    - precedence_group_declaration
+    - property_declaration
+    - protocol_declaration
+    - typealias_declaration
+  local_declaration:
+    - class_declaration
+    - function_declaration
+    - property_declaration
+    - typealias_declaration
+  protocol_member_declaration:
+    - associatedtype_declaration
+    - deinit_declaration
+    - init_declaration
+    - protocol_function_declaration
+    - protocol_property_declaration
+    - subscript_declaration
+    - typealias_declaration
+  type_level_declaration:
+    - associatedtype_declaration
+    - class_declaration
+    - deinit_declaration
+    - function_declaration
+    - import_declaration
+    - init_declaration
+    - operator_declaration
+    - precedence_group_declaration
+    - property_declaration
+    - protocol_declaration
+    - subscript_declaration
+    - typealias_declaration
   unannotated_type:
     - array_type
     - dictionary_type
@@ -128,7 +166,7 @@ named:
     target: expression
     type: type
   class_body:
-    $children*: [associatedtype_declaration, class_declaration, deinit_declaration, function_declaration, import_declaration, init_declaration, multiline_comment, operator_declaration, precedence_group_declaration, property_declaration, protocol_declaration, subscript_declaration, typealias_declaration]
+    $children*: [multiline_comment, type_level_declaration]
   class_declaration:
     $children*: [attribute, inheritance_modifier, inheritance_specifier, modifiers, ownership_modifier, property_behavior_modifier, type_constraints, type_parameters]
     body: [class_body, enum_class_body]
@@ -188,7 +226,7 @@ named:
     $children*: [catch_block, statements]
   else:
   enum_class_body:
-    $children*: [associatedtype_declaration, class_declaration, deinit_declaration, enum_entry, function_declaration, import_declaration, init_declaration, operator_declaration, precedence_group_declaration, property_declaration, protocol_declaration, subscript_declaration, typealias_declaration]
+    $children*: [enum_entry, type_level_declaration]
   enum_entry:
     $children?: modifiers
     data_contents*: enum_type_parameters
@@ -372,8 +410,7 @@ named:
     value*: expression
   property_modifier:
   protocol_body:
-    $children*: [associatedtype_declaration, deinit_declaration, init_declaration, protocol_function_declaration, protocol_property_declaration, subscript_declaration, typealias_declaration]
-    body*: protocol_function_declaration
+    $children*: protocol_member_declaration
   protocol_composition_type:
     $children+: unannotated_type
   protocol_declaration:
@@ -382,9 +419,10 @@ named:
     declaration_kind: "protocol"
     name: type_identifier
   protocol_function_declaration:
-    $children*: [attribute, modifiers, parameter, statements, throws, throws_clause, type_constraints, type_parameters]
+    $children*: [attribute, modifiers, parameter, throws, throws_clause, type_constraints, type_parameters]
+    body?: function_body
     default_value*: expression
-    name?: [referenceable_operator, simple_identifier]
+    name: [referenceable_operator, simple_identifier]
     return_type?: [implicitly_unwrapped_type, type]
   protocol_property_declaration:
     $children+: [modifiers, protocol_property_requirements, type_annotation, type_constraints]
@@ -421,11 +459,11 @@ named:
   shebang_line:
   simple_identifier:
   source_file:
-    $children*: [associatedtype_declaration, class_declaration, do_statement, expression, for_statement, function_declaration, guard_statement, import_declaration, init_declaration, macro_declaration, operator_declaration, precedence_group_declaration, property_declaration, protocol_declaration, repeat_while_statement, shebang_line, statement_label, throw_keyword, typealias_declaration, while_statement]
+    $children*: [do_statement, expression, for_statement, global_declaration, guard_statement, repeat_while_statement, shebang_line, statement_label, throw_keyword, while_statement]
   special_literal:
   statement_label:
   statements:
-    $children+: [class_declaration, control_transfer_statement, do_statement, expression, for_statement, function_declaration, guard_statement, property_declaration, repeat_while_statement, statement_label, typealias_declaration, while_statement]
+    $children+: [control_transfer_statement, do_statement, expression, for_statement, guard_statement, local_declaration, repeat_while_statement, statement_label, while_statement]
   str_escaped_char:
   subscript_declaration:
     $children+: [attribute, computed_property, modifiers, parameter, type_constraints, type_parameters]