|  | // Copyright (c) 2019, the Dart project authors.  Please see the AUTHORS file | 
|  | // for details. All rights reserved. Use of this source code is governed by a | 
|  | // BSD-style license that can be found in the LICENSE file. | 
|  |  | 
|  | /// Backslash xXX must have exactly 2 hex digits. | 
|  |  | 
|  | main() { | 
|  | var str = "Foo\x0"; | 
|  | //            ^^^ | 
|  | // [analyzer] SYNTACTIC_ERROR.INVALID_HEX_ESCAPE | 
|  | // [cfe] An escape sequence starting with '\x' must be followed by 2 hexadecimal digits. | 
|  | str = "Foo\xF Bar"; | 
|  | //        ^^^ | 
|  | // [analyzer] SYNTACTIC_ERROR.INVALID_HEX_ESCAPE | 
|  | // [cfe] An escape sequence starting with '\x' must be followed by 2 hexadecimal digits. | 
|  | } |