Extract DiagnosticReporter implementation from Compiler.

pkg/compiler/lib/src/inferrer/inferrer_visitor.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.
 
 library inferrer_visitor;
 
 import 'dart:collection' show
     IterableMixin;
 
 import '../compiler.dart' show
     Compiler;
 import '../constants/constant_system.dart';
 import '../constants/expressions.dart';
 import '../dart_types.dart';
+import '../diagnostics/diagnostic_listener.dart' show
+    DiagnosticReporter;
 import '../diagnostics/spannable.dart' show
     Spannable;
 import '../elements/elements.dart';
 import '../resolution/operators.dart';
 import '../resolution/semantic_visitor.dart';
 import '../resolution/send_resolver.dart' show
     SendResolverMixin;
 import '../resolution/tree_elements.dart' show
     TreeElements;
 import '../tree/tree.dart';
@@ skipping 717 matching lines @@
       this.elements = analyzedElement.resolvedAst.elements {
     if (handler != null) return;
     Node node = analyzedElement.node;
     FieldInitializationScope<T> fieldScope =
         analyzedElement.isGenerativeConstructor
             ? new FieldInitializationScope<T>(types)
             : null;
     locals = new LocalsHandler<T>(inferrer, types, compiler, node, fieldScope);
   }
 
+  DiagnosticReporter get reporter => compiler.reporter;
+
   @override
   SemanticSendVisitor get sendVisitor => this;
 
   @override
   T apply(Node node, _) => visit(node);
 
   T handleSendSet(SendSet node);
 
   T handleDynamicInvoke(Send node);
 
@@ skipping 694 matching lines @@
   T visitContinueStatement(ContinueStatement node) {
     JumpTarget target = elements.getTargetOf(node);
     locals.seenBreakOrContinue = true;
     // Do a deep-copy of the locals, because the code following the
     // continue will change them.
     continuesFor[target].add(new LocalsHandler<T>.deepCopyOf(locals));
     return null;
   }
 
   internalError(Spannable node, String reason) {
-    compiler.internalError(node, reason);
+    reporter.internalError(node, reason);
   }
 
   T visitSwitchStatement(SwitchStatement node) {
     visit(node.parenthesizedExpression);
 
     setupBreaksAndContinues(elements.getTargetDefinition(node));
     if (Elements.switchStatementHasContinue(node, elements)) {
       void forEachLabeledCase(void action(JumpTarget target)) {
         for (SwitchCase switchCase in node.cases) {
           for (Node labelOrCase in switchCase.labelsAndCases) {
@@ skipping 57 matching lines @@
     return type;
   }
 
   T visitCascade(Cascade node) {
     // Ignore the result of the cascade send and return the type of the cascade
     // receiver.
     visit(node.expression);
     return cascadeReceiverStack.removeLast();
   }
 }