Add ParameterMirror.isInitializingFormal to dart:mirrors

tests/lib/mirrors/parameter_test.dart

 // Copyright (c) 2013, 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.
 
 // This tests uses the multi-test "ok" feature:
 // none: Desired behaviour, passing on the VM.
 // 01: Trimmed version for dart2js.
 //
 // TODO(rmacnak,ahe): Remove multi-test when VM and dart2js are on par.
 
 /** Test of [ParameterMirror]. */
 library test.parameter_test;
 
 @MirrorsUsed(targets: const ['test.parameter_test', 'dart.core.int'], override: '*')
 import 'dart:mirrors';
 
 import 'package:expect/expect.dart';
 import 'stringify.dart';
 
 class B {
   B();
   B.foo(int x);
   B.bar(int z, x);
 
   // TODO(6490): Currently only supported by the VM.
   B.baz(final int x, int y, final int z);
   B.qux(int x, [int y= 3 + 1]);
   B.quux(int x, {String str: "foo"});
   B.corge({int x: 3 * 17, String str: "bar"});
+  B.corgi(int this.z);
 
   var _x;
+  var z;
   get x =>  _x;
   set x(final value) { _x = value; }
 
   grault([int x]) {}
   garply({int y}) {}
   waldo(int z) {}
 }
 
 class C <S extends int, T> {
   // TODO(6490): Currently only supported by the VM.
   foo(int a, S b) => b;
   bar(S a, T b, num c) {}
 }
 
 main() {
   ClassMirror cm = reflectClass(B);
   var constructors = new Map<Symbol, MethodMirror>();
   cm.declarations.forEach((k, v) {
     if (v is MethodMirror && v.isConstructor) constructors[k] = v;
   });
 
   List<Symbol> constructorKeys =
-      [#B, #B.bar, #B.baz, #B.foo, #B.quux, #B.qux, #B.corge];
+      [#B, #B.bar, #B.baz, #B.foo, #B.quux, #B.qux, #B.corge, #B.corgi];
   Expect.setEquals(constructorKeys, constructors.keys);
 
   MethodMirror unnamedConstructor = constructors[#B];
   expect('Method(s(B) in s(B), constructor)', unnamedConstructor);
   expect('[]', unnamedConstructor.parameters);
   expect('Class(s(B) in s(test.parameter_test), top-level)',
          unnamedConstructor.returnType);
 
   MethodMirror fooConstructor = constructors[#B.foo];
   expect('Method(s(B.foo) in s(B), constructor)', fooConstructor);
@@ skipping 55 matching lines @@
   expect('[Parameter(s(x) in s(B.corge), optional, named,'
          ' value = Instance(value = 51),'
          ' type = Class(s(int) in s(dart.core), top-level)), '
          'Parameter(s(str) in s(B.corge), optional, named,'
          ' value = Instance(value = bar),'
          ' type = Class(s(String) in s(dart.core), top-level))]',
          corgeConstructor.parameters);
   expect('Class(s(B) in s(test.parameter_test), top-level)',
          corgeConstructor.returnType);
 
+  ParameterMirror bazZParameter = 
+      bazConstructor.parameters.firstWhere((p) => p.simpleName == #z);
+  Expect.isFalse(bazZParameter.isInitializingFormal);
+  MethodMirror corgiConstructor = constructors[#B.corgi];
+  ParameterMirror corgiZParameter = 
+      corgiConstructor.parameters.firstWhere((p) => p.simpleName == #z);
+  Expect.isTrue(corgiZParameter.isInitializingFormal);
+
   MethodMirror xGetter = cm.declarations[#x];
   expect('Method(s(x) in s(B), getter)', xGetter);
   expect('[]', xGetter.parameters);
 
   MethodMirror xSetter = cm.declarations[const Symbol('x=')];
   expect('Method(s(x=) in s(B), setter)', xSetter);
   expect('[Parameter(s(value) in s(x=), final,'
          ' type = Type(s(dynamic), top-level))]',
          xSetter.parameters);
 
@@ skipping 34 matching lines @@
   expect('[Parameter(s(a) in s(bar),'
          ' type = TypeVariable(s(S) in s(C),'
          ' upperBound = Class(s(int) in s(dart.core), top-level))), '
          'Parameter(s(b) in s(bar),'
          ' type = TypeVariable(s(T) in s(C),'
          ' upperBound = Class(s(Object) in s(dart.core), top-level))), '
          'Parameter(s(c) in s(bar),'
          ' type = Class(s(num) in s(dart.core), top-level))]',
          barInC.parameters);
 }