Don't generate docs for private types. Cuts doc generation time in half.

lib/dartdoc/dartdoc.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /**
  * To use it, from this directory, run:
  *
  *     $ ./dartdoc <path to .dart file>
  *
  * This will create a "docs" directory with the docs for your libraries. To
@@ skipping 514 matching lines @@
     }
 
     docTypes(classes, 'Classes');
     docTypes(interfaces, 'Interfaces');
     docTypes(exceptions, 'Exceptions');
 
     writeFooter();
     endFile();
 
     for (final type in library.types.getValues()) {
-      if (!type.isTop) docType(type);
+      if (type.isTop) continue;
+      if (type.name.startsWith('_')) continue;

[nweiz, 2012/03/15 21:04:43]

I personally like using continue here, but isn't it contrary to the preferred
style?

[Bob Nystrom, 2012/03/15 22:14:28]

I don't think so. I know some people aren't a fan of continue, but I'm not aware
of any prescription against using it.

+      docType(type);
     }
   }
 
   void docTypes(List<Type> types, String header) {
     if (types.length == 0) return;
 
     writeln('<h3>$header</h3>');
 
     for (final type in types) {
       writeln(
@@ skipping 666 matching lines @@
 
     return new md.Element.text('code', name);
   }
 
   // TODO(rnystrom): Move into SourceSpan?
   int getSpanColumn(SourceSpan span) {
     final line = span.file.getLine(span.start);
     return span.file.getColumn(line, span.start);
   }
 }