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/test-suite/d/director_protected_runme.2.d

@@ -0,0 +1,36 @@
+module director_protected_runme;
+
+import std.exception;
+import director_protected.Foo;
+import director_protected.Bar;
+
+void main() {
+  Bar b = new Bar();
+  Foo f = b.create();
+  auto fb = new FooBar();
+  scope fb2 = new FooBar2();
+
+  enforce(fb.used() == "Foo::pang();Bar::pong();Foo::pong();FooBar::ping();", "bad FooBar::used" ~ " - " ~ fb.used());
+  enforce(fb2.used() == "FooBar2::pang();Bar::pong();Foo::pong();FooBar2::ping();", "bad FooBar2::used");
+  enforce(b.pong() == "Bar::pong();Foo::pong();Bar::ping();", "bad Bar::pong");
+  enforce(f.pong() == "Bar::pong();Foo::pong();Bar::ping();", "bad Foo::pong");
+  enforce(fb.pong() == "Bar::pong();Foo::pong();FooBar::ping();", "bad FooBar::pong");
+}
+
+class FooBar : Bar {
+protected:
+  override string ping() {
+    return "FooBar::ping();";
+  }
+}
+
+class FooBar2 : Bar {
+protected:
+  override string ping() {
+    return "FooBar2::ping();";
+  }
+
+  override string pang() {
+    return "FooBar2::pang();";
+  }
+}