-dump-astの方が判りやすいのか。 (source_file (import_decl trailing_semi 'UIKit') (top_level_code_decl (brace_stmt (call_expr type='CGSize' location=<stdin>:1:22 range=[<stdin>:1:15 - line:1:27] nothrow arg_labels= (dot_syntax_call_expr type='([NSAttributedString.Key : Any]?) -> CGSize' location=<stdin>:1:22 range=[<stdin>:1:15 - line:1:22] nothrow (declref_expr type='(NSString) -> ([NSAttributedString.Key : Any]?) -> CGSize' location=<stdin>:1:22 range=[<stdin>:1:22 - line:1:22] decl=UIKit.(file).NSString.size(withAttributes:) function_ref=single) (bridge_to_objc_expr implicit type='NSString' location=<stdin>:1:15 range=[<stdin>:1:15 - line:1:15] (string_literal_expr type='String' location=<stdin>:1:15 range=[<stdin>:1:15 - line:1:15] encoding=utf8 value="test" builtin_initializer=Swift.(file).String.init(_builtinStringLiteral:utf8CodeUnitCount:isASCII:) initializer=**NULL**))) (tuple_shuffle_expr implicit type='(withAttributes: [NSAttributedString.Key : Any]?)' location=<stdin>:1:26 range=[<stdin>:1:26 - line:1:27] tuple_to_tuple elements=[-3] variadic_sources=[] default_args_owner=UIKit.(file).NSString.size(withAttributes:) (tuple_expr type='()' location=<stdin>:1:26 range=[<stdin>:1:26 - line:1:27]))))))
