tree-sitter: add support for implements in the tree sitter grammar (#169)

Author: Krotki

tree_sitter_v/bindings/node_types.v

@@ -74,6 +74,7 @@ pub enum NodeType {
 	identifier_list
 	if_attribute
 	if_expression
+	implements
 	import_alias
 	import_declaration
 	import_list
@@ -383,6 +384,7 @@ const node_type_name_to_enum = {
 	'identifier_list':                  NodeType.identifier_list
 	'if_attribute':                     NodeType.if_attribute
 	'if_expression':                    NodeType.if_expression
+	'implements':                       NodeType.implements
 	'import_alias':                     NodeType.import_alias
 	'import_declaration':               NodeType.import_declaration
 	'import_list':                      NodeType.import_list

tree_sitter_v/grammar.js

@@ -324,9 +324,16 @@ module.exports = grammar({
 				choice('struct', 'union'),
 				field('name', $.identifier),
 				optional(field('generic_parameters', $.generic_parameters)),
+				optional(seq('implements', field('implements', $.implements))),
 				$._struct_body,
 			),
 
+		implements: ($) =>
+			seq(
+				choice($.type_reference_expression, $.qualified_type),
+				repeat(seq(',', choice($.type_reference_expression, $.qualified_type)))
+			),
+
 		_struct_body: ($) =>
 			seq(
 				'{',