Quickfix lexer in terms of lambda header parsing, fixes #327

gdtoolkit/parser/gdscript_indenter.py

@@ -130,4 +130,18 @@ def _current_token_is_just_after_lambda_header(self):
                     and self.processed_tokens[-6].type == "FUNC"
                 )
             )
+        ) or (
+            len(self.processed_tokens) > 0
+            and self.processed_tokens[-2].type == "COLON"
+            and self.processed_tokens[-3].type == "TYPE_HINT"
+            and self.processed_tokens[-4].value == "->"
+            and self.processed_tokens[-5].type == "RPAR"
+            and self.processed_tokens[-6].type == "LPAR"
+            and (
+                self.processed_tokens[-7].type == "FUNC"
+                or (
+                    self.processed_tokens[-7].type == "NAME"
+                    and self.processed_tokens[-8].type == "FUNC"
+                )
+            )
         )

tests/valid-gd-scripts/bug_327_multiline_lambda.gd

@@ -0,0 +1,6 @@
+func foo(new_button, button_name, menu, _game_flow):
+	new_button.pressed.connect(
+		func() -> void:
+			var test := ""
+			_game_flow.ref.request_transition(menu[button_name].transition, menu[button_name].data)
+	)