Fixed order of automatically implemented abstract members.

#KT-1357 fixed

compiler/frontend/src/org/jetbrains/jet/lang/resolve/OverrideResolver.java

@@ -31,6 +31,7 @@ import org.jetbrains.jet.lang.types.JetType;
 import org.jetbrains.jet.lang.types.checker.JetTypeChecker;
 import org.jetbrains.jet.lexer.JetTokens;
 import org.jetbrains.jet.util.CommonSuppliers;
+import org.jetbrains.jet.util.LinkedMultiMap;
 
 import java.util.*;
 
@@ -91,7 +92,7 @@ public class OverrideResolver {
 
         MultiMap<String, CallableMemberDescriptor> functionsFromCurrentByName = groupDescriptorsByName(classDescriptor.getCallableMembers());
 
-        Set<String> functionNames = new HashSet<String>();
+        Set<String> functionNames = new LinkedHashSet<String>();
         functionNames.addAll(functionsFromSupertypesByName.keySet());
         functionNames.addAll(functionsFromCurrentByName.keySet());
         
@@ -170,7 +171,7 @@ public class OverrideResolver {
 
 
     private static <T extends DeclarationDescriptor> MultiMap<String, T> groupDescriptorsByName(Collection<T> properties) {
-        MultiMap<String, T> r = new MultiMap<String, T>();
+        MultiMap<String, T> r = new LinkedMultiMap<String, T>();
         for (T property : properties) {
             r.putValue(property.getName(), property);
         }
@@ -179,7 +180,7 @@ public class OverrideResolver {
 
 
     private static List<CallableMemberDescriptor> getDescriptorsFromSupertypes(ClassDescriptor classDescriptor) {
-        Set<CallableMemberDescriptor> r = Sets.newHashSet();
+        Set<CallableMemberDescriptor> r = Sets.newLinkedHashSet();
         for (JetType supertype : classDescriptor.getTypeConstructor().getSupertypes()) {
             r.addAll(getDescriptorsOfType(supertype.getMemberScope()));
         }

compiler/frontend/src/org/jetbrains/jet/util/LinkedMultiMap.java

@@ -0,0 +1,39 @@
+/*
+ * Copyright 2000-2012 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jetbrains.jet.util;
+
+import com.intellij.util.containers.MultiMap;
+
+import java.util.Collection;
+import java.util.LinkedHashMap;
+import java.util.Map;
+
+/**
+ * @author Evgeny Gerashchenko
+ * TODO reuse LinkedMultiMap from IDEA platform when it will be available there
+ */
+public class LinkedMultiMap<K, V> extends MultiMap<K, V> {
+    @Override
+    protected Map<K, Collection<V>> createMap() {
+        return new LinkedHashMap<K, Collection<V>>();
+    }
+
+    @Override
+    protected Map<K, Collection<V>> createMap(int i, float v) {
+        return new LinkedHashMap<K, Collection<V>>(i, v);
+    }
+}