WIP: Compute constant expressions in resolution.

pkg/compiler/lib/src/dart_backend/backend.dart

 // Copyright (c) 2012, 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.
 
 part of dart_backend;
 
 // TODO(ahe): This class is simply wrong.  This backend should use
 // elements when it can, not AST nodes.  Perhaps a [Map<Element,
 // TreeElements>] is what is needed.
 class ElementAst {
@@ skipping 504 matching lines @@
   }
 
   @override
   ConstantExpression compileConstant(VariableElement element) {
     return measure(() {
       return constantCompiler.compileConstant(element);
     });
   }
 
   @override
-  void evaluate(ConstantExpression constant) {
+  void evaluate(Spannable spannable, ConstantExpression constant) {
     return measure(() {
-      return constantCompiler.evaluate(constant);
+      return constantCompiler.evaluate(spannable, constant);
     });
   }
 
   void compileVariable(VariableElement element) {
     measure(() {
       constantCompiler.compileVariable(element);
     });
   }
 
   @override
@@ skipping 18 matching lines @@
   }
 
   // TODO(johnniwinther): Remove this when values are computed from the
   // expressions.
   @override
   void copyConstantValues(DartConstantTask task) {
     constantCompiler.constantValueMap.addAll(
         task.constantCompiler.constantValueMap);
   }
 }