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_string_runme.2.d

@@ -0,0 +1,42 @@
+module director_string_runme;
+
+import std.conv;
+import std.exception;
+import director_string.A;
+
+void main() {
+  auto c = new director_string_A("hi");
+  for (int i=0; i<3; ++i) {
+    auto s = c.call_get(i);
+    auto expected = to!string(i);
+    enforce(s == expected, "director_string_A.get(" ~ expected ~ ") failed. Got:" ~ s);
+  }
+
+  auto b = new director_string_B("hello");
+  enforce(b.call_get_first() == "director_string_B.get_first", "call_get_first() failed");
+  enforce(b.call_get(0) == "director_string_B.get: hello", "get(0) failed");
+}
+
+class director_string_B : A {
+public:
+  this(string first) {
+    super(first);
+  }
+  override string get_first() const {
+    return "director_string_B.get_first";
+  }
+
+  override string get(int n) const {
+    return "director_string_B.get: " ~ super.get(n);
+  }
+}
+
+class director_string_A : A {
+public:
+  this(string first) {
+    super(first);
+  }
+  override string get(int n) const {
+    return to!string(n);
+  }
+}