Store actual Reference(s) for additional exports.

pkg/kernel/lib/text/ast_to_text.dart

Index: pkg/kernel/lib/text/ast_to_text.dart
diff --git a/pkg/kernel/lib/text/ast_to_text.dart b/pkg/kernel/lib/text/ast_to_text.dart
index 12d012a1e07dd49b5862c54c99ac148c4f049dbd..9f4e3a4f64f499ebc9e897d040e6052d9651ff5a 100644
--- a/pkg/kernel/lib/text/ast_to_text.dart
+++ b/pkg/kernel/lib/text/ast_to_text.dart
@@ -283,7 +283,39 @@ class Printer extends Visitor<Null> {
         endLine('import "$importPath" as $prefix;');
       }
     }
+
     // TODO(scheglov): Do we want to print dependencies? dartbug.com/30224
+    if (library.additionalExports.isNotEmpty) {
+      write('additionalExports = (');
+      if (library.additionalExports.length > 5) {
+        write('too many items');

[ahe, 2017/08/29 11:04:23]

I don't think we should truncate the output.

[scheglov, 2017/08/29 15:16:26]

Done.

+      } else {
+        for (var reference in library.additionalExports) {
+          var node = reference.node;
+          if (node is Class) {
+            Library nodeLibrary = node.enclosingLibrary;
+            String prefix = syntheticNames.nameLibraryPrefix(nodeLibrary);
+            write(prefix + '::' + node.name);
+          } else if (node is Field) {
+            Library nodeLibrary = node.enclosingLibrary;
+            String prefix = syntheticNames.nameLibraryPrefix(nodeLibrary);
+            write(prefix + '::' + node.name.name);
+          } else if (node is Procedure) {
+            Library nodeLibrary = node.enclosingLibrary;
+            String prefix = syntheticNames.nameLibraryPrefix(nodeLibrary);
+            write(prefix + '::' + node.name.name);
+          } else if (node is Typedef) {
+            Library nodeLibrary = node.enclosingLibrary;
+            String prefix = syntheticNames.nameLibraryPrefix(nodeLibrary);
+            write(prefix + '::' + node.name);
+          } else {
+            throw new UnimplementedError('${node.runtimeType}');
+          }
+        }
+      }
+      endLine(')');
+    }
+
     endLine();
     var inner = new Printer._inner(this, imports);
     library.typedefs.forEach(inner.writeNode);