Provide typing information for destructuring parameters

examples/basic/src/functions.ts

@@ -188,4 +188,9 @@ export function createSomething() {
  *
  * Taken from http://usejsdoc.org/tags-inline-link.html.
  */
-export function functionWithDocLink():void { }
+export function functionWithDocLink():void { }
+
+/**
+ * A function with a destructuring argument that implements interface.
+ */
+export function functionWithTypedDestr({name}: classes.INameInterface) { }

src/lib/converter/types/binding-object.ts

@@ -19,14 +19,19 @@ export class BindingObjectConverter extends ConverterTypeComponent implements Ty
      *
      * @param context  The context object describing the current state the converter is in.
      * @param node  The binding pattern that should be converted.
+     * @param type  The type of the node if already known.
      * @returns The type reflection representing the given binding pattern.
      */
-    convertNode(context: Context, node: ts.BindingPattern): Type {
+    convertNode(context: Context, node: ts.BindingPattern, type: ts.Type): Type {
         const declaration = new DeclarationReflection();
         declaration.kind = ReflectionKind.TypeLiteral;
         declaration.name = '__type';
         declaration.parent = context.scope;
 
+        if (type) {
+            declaration.type = context.converter.convertType(context, null, type);
+        }
+
         context.registerReflection(declaration, null);
         context.trigger(Converter.EVENT_CREATE_DECLARATION, declaration, node);
         context.withScope(declaration, () => {

src/test/converter/destructuring/destructuring.ts

@@ -23,3 +23,12 @@ const [destructArrayWithIgnoresA, , ...destructArrayWithIgnoresRest] = [1, 2, 3,
  * Destructuring function parameters.
  */
 function drawText({text = "", location:[x, y] = [0, 0], bold = false}) { }
+
+interface ForDestructuring {
+    param: number;
+}
+
+/**
+ * Typed destructuring function parameters.
+ */
+function typedDestructuring({param = 1}: ForDestructuring) { }