1# Type notation using ``this`` is not supported 2 3Rule ``arkts-no-typing-with-this`` 4 5**Severity: error** 6 7ArkTS does not support type notation using the ``this`` keyword (for example, 8specifying a method's return type ``this`` is not allowed). Use explicit type 9instead. 10 11 12## TypeScript 13 14 15``` 16 17 interface ListItem { 18 getHead(): this 19 } 20 21 class C { 22 n: number = 0 23 24 m(c: this) { 25 console.log(c) 26 } 27 } 28 29``` 30 31## ArkTS 32 33 34``` 35 36 interface ListItem { 37 getHead(): ListItem 38 } 39 40 class C { 41 n: number = 0 42 43 m(c: C) { 44 console.log(c) 45 } 46 } 47 48``` 49 50 51