Add optional values

Author: spinillos

testdata/recursive.txtar

@@ -8,6 +8,11 @@ Recursive: {
     map: [string]: Recursive
     multipleValues: 23 | "abc" | [...MyStruct] | [...Recursive]
     union: [...MyStruct] | [...Recursive]
+    optionalValue?: Recursive
+    optionalList?: [...Recursive]
+    optionalMap?: [string]: Recursive
+    optionalMultipleValues?: 23 | "abc" | [...MyStruct] | [...Recursive]
+    optionalUnion?: [...MyStruct] | [...Recursive]
 } @cuetsy(kind="interface")
 
 -- ts --
@@ -19,10 +24,16 @@ export interface Recursive {
   map: Record<string, Recursive>;
   multipleValues: (23 | 'abc' | Array<MyStruct> | Array<Recursive>);
   myValue: string;
+  optionalList?: Array<Recursive>;
+  optionalMap?: Record<string, Recursive>;
+  optionalMultipleValues?: (23 | 'abc' | Array<MyStruct> | Array<Recursive>);
+  optionalUnion?: (Array<MyStruct> | Array<Recursive>);
+  optionalValue?: Recursive;
   union: (Array<MyStruct> | Array<Recursive>);
   value: Recursive;
 }
 
 export const defaultRecursive: Partial<Recursive> = {
   list: [],
+  optionalList: [],
 };