Fixed handling optional binding elements in dts files

Fixes #229

Co-authored-by: jinzhubaofu <ludafa@outlook.com>

src/types-usage-evaluator.ts

@@ -89,6 +89,11 @@ export class TypesUsageEvaluator {
 					continue;
 				}
 
+				// `{ propertyName: name }` - in this case we don't need to handle `propertyName` as it has no symbol
+				if (ts.isBindingElement(child.parent) && child.parent.propertyName === child) {
+					continue;
+				}
+
 				const childSymbols = splitTransientSymbol(this.getSymbol(child), this.typeChecker);
 
 				for (const childSymbol of childSymbols) {
@@ -110,7 +115,7 @@ export class TypesUsageEvaluator {
 	private getSymbol(node: ts.Node): ts.Symbol {
 		const nodeSymbol = this.typeChecker.getSymbolAtLocation(node);
 		if (nodeSymbol === undefined) {
-			throw new Error(`Cannot find symbol for node: ${node.getText()}`);
+			throw new Error(`Cannot find symbol for node "${node.getText()}" in "${node.parent.getText()}" from "${node.getSourceFile().fileName}"`);
 		}
 
 		return this.getActualSymbol(nodeSymbol);

tests/e2e/test-cases/primitive-generation/input.ts

@@ -4,3 +4,7 @@ export interface InterfaceName {
 	prop: number;
 	prop2: TypeName;
 }
+
+export function func({ prop: prop3 }: InterfaceName = { prop: 1, prop2: 1 }): TypeName {
+	throw new Error('it does not matter' + prop3);
+}

tests/e2e/test-cases/primitive-generation/output.d.ts

@@ -3,5 +3,6 @@ export interface InterfaceName {
 	prop: number;
 	prop2: TypeName;
 }
+export declare function func({ prop: prop3 }?: InterfaceName): TypeName;
 
 export {};