Added support for the D programming languge.

It is still a bit rough around some edges, particularly with regard to multi-threading and operator overloading, and there are some documentation bits missing, but it should be fine for basic use.

The test-suite should build and run fine with the current versions of DMD, LDC and Tango (at least) on Linux x86_64 and Mac OS X 10.6.

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@12299 626c5289-ae23-0410-ae9c-e8d60b6d4f22

Examples/d/callback/d1/runme.d

@@ -0,0 +1,36 @@
+module runme;
+
+import tango.io.Stdout;
+import example;
+
+public class DCallback : Callback {
+  public override void run() {
+    Stdout( "DCallback.run()" ).newline;
+  }
+}
+
+void main() {
+  auto caller = new Caller();
+
+  Stdout( "Adding and calling a normal C++ callback" ).newline;
+  Stdout( "----------------------------------------" ).newline;
+  {
+    scope auto callback = new Callback();
+    caller.setCallback(callback);
+    caller.call();
+    caller.resetCallback();
+  }
+
+  Stdout.newline;
+  Stdout( "Adding and calling a D callback" ).newline;
+  Stdout( "-------------------------------" ).newline;
+  {
+    scope auto callback = new DCallback();
+    caller.setCallback(callback);
+    caller.call();
+    caller.resetCallback();
+  }
+
+  Stdout.newline;
+  Stdout( "D exit" ).newline;
+}