Don't define parameters when visiting a function-typed formal parameter.

pkg/analyzer/test/generated/non_error_resolver_test.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library engine.non_error_resolver_test;
 
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/element.dart';
 import 'package:analyzer/src/generated/error.dart';
 import 'package:analyzer/src/generated/parser.dart' show ParserErrorCode;
@@ skipping 3740 matching lines @@
   void test_optionalParameterInOperator_required() {
     Source source = addSource(r'''
 class A {
   operator +(p) {}
 }''');
     resolve(source);
     assertNoErrors(source);
     verify([source]);
   }
 
+  void test_parameterDefaultDoesNotReferToParameterName() {
+    // The final "f" should refer to the toplevel function "f", not to the
+    // parameter called "f".  See dartbug.com/13179.
+    Source source = addSource('void f([void f([x]) = f]) {}');
+    resolve(source);
+    assertNoErrors(source);
+    verify([source]);
+  }
+
   void test_parameterScope_local() {
     // Parameter names shouldn't conflict with the name of the function they
     // are enclosed in.
     Source source = addSource(r'''
 f() {
   g(g) {
     h(g);
   }
 }
 h(x) {}
@@ skipping 1591 matching lines @@
     resolve(source);
     assertNoErrors(source);
     verify([source]);
     reset();
   }
 
   void _check_wrongNumberOfParametersForOperator1(String name) {
     _check_wrongNumberOfParametersForOperator(name, "a");
   }
 }