streams2: Export Readable/Writable State classes

lib/_stream_readable.js

@@ -20,6 +20,7 @@
 // USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 module.exports = Readable;
+Readable.ReadableState = ReadableState;
 
 var Stream = require('stream');
 var util = require('util');

lib/_stream_writable.js

@@ -23,7 +23,8 @@
 // Implement an async ._write(chunk, cb), and it'll handle all
 // the drain event emission and buffering.
 
-module.exports = Writable
+module.exports = Writable;
+Writable.WritableState = WritableState;
 
 var util = require('util');
 var Stream = require('stream');