fix(complex-types): handle optional properties correctly

Author: so1ve

packages/complex-types/package.json

@@ -70,6 +70,7 @@
 		"@nuxt/kit": "catalog:",
 		"@vue.ts/language": "workspace:*",
 		"@vue.ts/shared": "workspace:*",
+		"@vue/shared": "^3.5.22",
 		"defu": "^6.1.4",
 		"magic-string": "catalog:",
 		"unplugin": "catalog:"

packages/complex-types/src/core/printer.ts

@@ -25,10 +25,8 @@ export class Printer {
 		].join(separator);
 	}
 
-	private containsUndefined(type: ts.Type): boolean {
-		return type.isUnion()
-			? type.types.some((t) => t.flags & ts.TypeFlags.Undefined)
-			: !!(type.flags & ts.TypeFlags.Undefined);
+	private isSymbolOptional(symbol: ts.Symbol): boolean {
+		return !!(symbol.flags & ts.SymbolFlags.Optional);
 	}
 
 	private printConditionType(type: ts.ConditionalType, inner: boolean): string {
@@ -88,9 +86,16 @@ export class Printer {
 			> = {};
 			for (const prop of properties) {
 				const propType = this.checker.getTypeOfSymbol(prop);
+				const node = prop.declarations?.[0];
+				const hasQuestionToken = !!(
+					node &&
+					ts.isPropertySignature(node) &&
+					node.questionToken
+				);
+
 				props[prop.getName()] = {
 					value: this.printType(propType, true),
-					isOptional: this.containsUndefined(propType),
+					isOptional: this.isSymbolOptional(prop),
 				};
 			}
 

packages/complex-types/test/__fixtures__/defineProps/basic.vue

@@ -29,6 +29,7 @@ defineProps<
 		symbol: symbol;
 		'quotes"': string;
 		enum: SomeEnum;
+		anyQuestion?: any;
 	} & SomeInterface & {
 			[MappedString in "1-1" | "1-2"]: `${MappedString}MappedType`;
 		} & {