Internal libraries supported.

sdk/lib/_internal/compiler/implementation/elements/elements.dart

Index: sdk/lib/_internal/compiler/implementation/elements/elements.dart
diff --git a/sdk/lib/_internal/compiler/implementation/elements/elements.dart b/sdk/lib/_internal/compiler/implementation/elements/elements.dart
index 7890981eb002f27662f6f271e4aa7982a620aff8..ede8347b789ae2da3d3bf16ebb8629f6c1a4fbe6 100644
--- a/sdk/lib/_internal/compiler/implementation/elements/elements.dart
+++ b/sdk/lib/_internal/compiler/implementation/elements/elements.dart
@@ -471,6 +471,13 @@ abstract class CompilationUnitElement extends Element {
 }
 
 abstract class LibraryElement extends Element implements ScopeContainerElement {
+  /**
+   * The canonical uri for this library.
+   *
+   * For user libraries the canonical uri is the script uri. For platform
+   * libraries the canonical uri is of the form [:dart:x:], and for a patch
+   * library for [:dart:x:] the canonical uri is [:patch:_x:].

[ahe, 2013/01/18 11:03:10]

Why add an underscore?

[Johnni Winther, 2013/01/21 09:27:54]

No need. The scheme is enough protection that we cannot load a patch library
from the outside.

+   */
   Uri get uri;
   CompilationUnitElement get entryCompilationUnit;
   Link<CompilationUnitElement> get compilationUnits;
@@ -478,7 +485,17 @@ abstract class LibraryElement extends Element implements ScopeContainerElement {
   LibraryName get libraryTag;
   Link<Element> get exports;
 
+  /**
+   * [:true:] if this library is part of the platform, i.e. its canonical

[ahe, 2013/01/18 11:03:10]

i.e. -> that is (not all of us have studied ancient languages ;-)

[Johnni Winther, 2013/01/21 09:27:54]

Well, I didn't write 'id est' ;-)

+   * uri has the scheme 'dart'.
+   */
   bool get isPlatformLibrary;
+
+  /**
+   * [:true:] if this library is a platform library whose path starts with

[ahe, 2013/01/18 11:03:10]

I'm concerned about this approach. It seems brittle to base this on the first
character of the path.

[Johnni Winther, 2013/01/21 09:27:54]

The security is based on the [isPlatformLibrary] call as well. This checks the
canonical uri to have the 'dart' scheme, and this we set ourselves.

+   * an underscore.
+   */
+  bool get isPrivateLibrary;
   bool get canUseNative;
   bool get exportsHandled;