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/class/d2/runme.d

@@ -0,0 +1,58 @@
+// This example illustrates how C++ classes can be used from D using SWIG.
+// The D class gets mapped onto the C++ class and behaves as if it is a D class.
+module runme;
+
+import std.stdio;
+import example;
+
+void main() {
+  // ----- Object creation -----
+
+  writeln( "Creating some objects:" );
+
+  {
+    scope Square s = new Square(10);
+    scope Circle c = new Circle(10);
+
+    // ----- Access a static member -----
+    writefln( "%s shapes were created.", Shape.nshapes );
+
+    // ----- Member data access -----
+
+    // Notice how we can do this using functions specific to
+    // the 'Circle' class.
+    c.x = 20;
+    c.y = 30;
+
+    // Now use the same functions in the base class
+    Shape shape = s;
+    shape.x = -10;
+    shape.y = 5;
+
+    writeln( "\nHere is their current position:" );
+    writefln( "    Circle = ( %s, %s )", c.x, c.y );
+    writefln( "    Square = ( %s, %s )", s.x, s.y );
+
+    // ----- Call some methods -----
+
+    writeln( "\nHere are some properties of the shapes:" );
+    Shape[] shapes = [ cast(Shape) c, cast(Shape) s ];
+    foreach ( currentShape; shapes )
+    {
+      writefln( "    %s", currentShape.classinfo.name );
+      writefln( "        area      = %s", currentShape.area() );
+      writefln( "        perimeter = %s", currentShape.perimeter() );
+    }
+
+    // Notice how the area() and perimeter() functions really
+    // invoke the appropriate virtual method on each object.
+
+    // ----- Delete everything -----
+    writeln( "\nGuess I'll clean up now:" );
+    // Note: when this using scope is exited the D destructors are called which
+    // in turn call the C++ destructors.
+  }
+
+  writefln( "%s shapes remain", Shape.nshapes );
+  writeln( "\nGoodbye!" );
+}