Support for constructor references in constant serializer and prelinker.

pkg/analyzer/lib/src/summary/summarize_ast.dart

Index: pkg/analyzer/lib/src/summary/summarize_ast.dart
diff --git a/pkg/analyzer/lib/src/summary/summarize_ast.dart b/pkg/analyzer/lib/src/summary/summarize_ast.dart
index f272fef3849cd7b6e4e381a2bd70b74779136353..f371257053a59f65a6321bcfe4f0c456200e138c 100644
--- a/pkg/analyzer/lib/src/summary/summarize_ast.dart
+++ b/pkg/analyzer/lib/src/summary/summarize_ast.dart
@@ -28,6 +28,28 @@ class _ConstExprSerializer extends AbstractConstExprSerializer {
 
   _ConstExprSerializer(this.visitor);
 
+  @override
+  EntityRefBuilder serializeConstructorName(ConstructorName constructor) {
+    TypeName type = constructor.type;
+    Identifier typeName = type.name;
+    EntityRefBuilder typeBuilder = serializeType(type);
+    if (typeName is SimpleIdentifier) {
+      int nameRef = visitor.serializeReference(typeBuilder.reference, '');
+      return new EntityRefBuilder(reference: nameRef);

[Paul Berry, 2016/01/26 00:47:21]

I don't understand why there are three separate return statements in this
function.  Aren't there only two cases (named and unnamed constructors)?

[scheglov, 2016/01/26 04:34:49]

Fixed.
Now we record only explicit names and let the client to decide what to do with a
class or constructor reference.

+    } else if (typeName is PrefixedIdentifier) {
+      if (constructor.name == null) {
+        return typeBuilder;
+      } else {
+        String name = constructor.name.name;
+        int nameRef = visitor.serializeReference(typeBuilder.reference, name);
+        return new EntityRefBuilder(reference: nameRef);
+      }
+    } else {
+      throw new StateError(
+          'Unexpected identifier type: ${typeName.runtimeType}');
+    }
+  }
+
   EntityRefBuilder serializeIdentifier(Identifier identifier) {
     EntityRefBuilder b = new EntityRefBuilder();
     if (identifier is SimpleIdentifier) {