Lazy implementation of final variables.

lib/compiler/implementation/compiler.dart

Index: lib/compiler/implementation/compiler.dart
diff --git a/lib/compiler/implementation/compiler.dart b/lib/compiler/implementation/compiler.dart
index 1b68df8719f13412a70e87a49c951672b67cbc8f..f732d44fb7f99b64ad6ff936be9027e11f485797 100644
--- a/lib/compiler/implementation/compiler.dart
+++ b/lib/compiler/implementation/compiler.dart
@@ -718,11 +718,7 @@ class Compiler implements DiagnosticListener {
       }
       progress.reset();
     }
-    if (work.element.kind.category == ElementCategory.VARIABLE) {
-      constantHandler.compileWorkItem(work);
-    } else {
-      backend.codegen(work);
-    }
+    backend.codegen(work);
   }
 
   void registerInstantiatedClass(ClassElement cls) {
@@ -756,6 +752,18 @@ class Compiler implements DiagnosticListener {
         () => resolver.computeFunctionType(element, signature));
   }
 
+  bool isLazilyInitialized(VariableElement element) {
+    Constant initialValue = compileVariable(element);
+    return initialValue === null;
+  }
+
+  /** Compiles compile-time constants. Must not return `null`. */

[ahe, 2012/09/05 09:34:35]

[: null :]

[ahe, 2012/09/05 09:34:35]

What happens if element isn't a constant?

[floitsch, 2012/09/05 10:43:16]

Done.

[floitsch, 2012/09/05 10:43:16]

Then an error is reported. Updated comment.

+  Constant compileConstant(VariableElement element) {
+    return withCurrentElement(element, () {
+      return constantHandler.compileConstant(element);
+    });
+  }
+
   Constant compileVariable(VariableElement element) {
     return withCurrentElement(element, () {
       return constantHandler.compileVariable(element);