update swig on windows

winx64/bin/swigwin-4.0.0/Examples/d/funcptr/d2/runme.d

@@ -0,0 +1,34 @@
+module runme;
+
+import std.stdio;
+static import example;
+
+extern(C) int add(int a, int b) {
+  return a + b;
+}
+
+extern(C) int sub(int a, int b) {
+  return a - b;
+}
+
+extern(C) int mul(int a, int b) {
+  return a * b;
+}
+
+void main() {
+  int a = 37;
+  int b = 42;
+
+  writefln( "a = %s", a );
+  writefln( "b = %s", b );
+
+  writeln( "Trying some C callback functions:" );
+  writefln( "    ADD(a,b) = %s", example.do_op( a, b, example.ADD ) );
+  writefln( "    SUB(a,b) = %s", example.do_op( a, b, example.SUB ) );
+  writefln( "    MUL(a,b) = %s", example.do_op( a, b, example.MUL ) );
+
+  writeln( "Now the same with callback functions defined in D:" );
+  writefln( "    add(a,b) = %s", example.do_op( a, b, &add ) );
+  writefln( "    sub(a,b) = %s", example.do_op( a, b, &sub ) );
+  writefln( "    mul(a,b) = %s", example.do_op( a, b, &mul ) );
+}