Allow to invoke fields as if they were methods.

frog/leg/scanner/listener.dart

Index: frog/leg/scanner/listener.dart
diff --git a/frog/leg/scanner/listener.dart b/frog/leg/scanner/listener.dart
index 0adec393c72b87a84d689af8f5b56cc70c9c4e44..e27904d03f5fa2111f81c2654df9b030dd6998dd 100644
--- a/frog/leg/scanner/listener.dart
+++ b/frog/leg/scanner/listener.dart
@@ -550,8 +550,16 @@ class ElementListener extends Listener {
   void endTopLevelMethod(Token beginToken, Token getOrSet, Token endToken) {
     Identifier name = popNode();
     Modifiers modifiers = popNode();
+    ElementKind kind;
+    if (getOrSet === null) {
+      kind = ElementKind.FUNCTION;
+    } else if (getOrSet.stringValue === 'get') {
+      kind = ElementKind.GETTER;
+    } else if (getOrSet.stringValue === 'set') {
+      kind = ElementKind.SETTER;
+    }
     pushElement(new PartialFunctionElement(name.source, beginToken, getOrSet,
-                                           endToken, ElementKind.FUNCTION,
+                                           endToken, kind,
                                            modifiers, compilationUnitElement));
   }
 
@@ -819,8 +827,16 @@ class NodeListener extends ElementListener {
     NodeList formalParameters = popNode();
     Identifier name = popNode();
     Modifiers modifiers = popNode();
+    ElementKind kind;
+    if (getOrSet === null) {
+      kind = ElementKind.FUNCTION;
+    } else if (getOrSet.stringValue === 'get') {
+      kind = ElementKind.GETTER;
+    } else if (getOrSet.stringValue === 'set') {
+      kind = ElementKind.SETTER;
+    }    
     pushElement(new PartialFunctionElement(name.source, beginToken, getOrSet,
-                                           endToken, ElementKind.FUNCTION,
+                                           endToken, kind,
                                            modifiers, compilationUnitElement));
   }