Use generic methods in DebugIterable

pkg/compiler/lib/src/helpers/debug_collection.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.
 
 typedef void DebugCallback(String methodName, var arg1, var arg2);
 
 class DebugMap<K, V> implements Map<K, V> {
   final Map<K, V> map;
   DebugCallback indexSetCallBack;
   DebugCallback putIfAbsentCallBack;
@@ skipping 53 matching lines @@
   bool get isNotEmpty => map.isNotEmpty;
 }
 
 class DebugIterable<E> implements Iterable<E> {
   final Iterable<E> iterable;
 
   DebugIterable(this.iterable);
 
   Iterator<E> get iterator => iterable.iterator;
 
-  Iterable map(f(E element)) => iterable.map(f);
+  Iterable<T> map<T>( T f(E element)) => iterable.map(f);

[Siggi Cherem (dart-lang), 2017/01/11 22:42:11]

nit: dartfmt

[Johnni Winther, 2017/01/12 11:10:03]

Done.

 
   Iterable<E> where(bool test(E element)) => iterable.where(test);
 
-  Iterable expand(Iterable f(E element)) => iterable.expand(f);
+  Iterable<T> expand<T>(Iterable<T> f(E element)) => iterable.expand(f);
 
   bool contains(Object element) => iterable.contains(element);
 
   void forEach(void f(E element)) => iterable.forEach(f);
 
   E reduce(E combine(E value, E element)) => iterable.reduce(combine);
 
-  dynamic fold(
-      var initialValue, dynamic combine(var previousValue, E element)) {
+  T fold<T>(T initialValue, T combine(T previousValue, E element)) {
     return iterable.fold(initialValue, combine);
   }
 
   bool every(bool test(E element)) => iterable.every(test);
 
   String join([String separator = ""]) => iterable.join(separator);
 
   bool any(bool test(E element)) => iterable.any(test);
 
   List<E> toList({bool growable: true}) {
@@ skipping 230 matching lines @@
     check(element, '$methodName: ');
   }
 
   void check(var element, [String text = '']) {
     String elementType = '${element.runtimeType}';
     if (runtimeTypes.contains(elementType)) return;
     throw '$name: $text$elementType'
         '${showObjects ? ' ($element)' : ''}';
   }
 }