Added simple wrapper for calling DBus interfaces.

source/ddbus/simple.d

@@ -0,0 +1,43 @@
+module ddbus.simple;
+
+import ddbus.thin;
+import ddbus.util;
+import ddbus.c_lib;
+import std.string;
+
+class PathIface {
+  this(Connection conn, string dest, string path, string iface) {
+    this.conn = conn;
+    this.dest = dest.toStringz();
+    this.path = path.toStringz();
+    this.iface = iface.toStringz();
+  }
+
+  Ret call(Ret, Args...)(string meth, Args args) if(allCanDBus!Args && canDBus!Ret) {
+    Message msg = new Message(dbus_message_new_method_call(dest,path,iface,meth.toStringz()));
+    msg.build(args);
+    Message ret = conn.sendWithReplyBlocking(msg);
+    return ret.read!Ret();
+  }
+
+  Message opDispatch(string meth, Args...)(Args args) {
+    Message msg = new Message(dbus_message_new_method_call(dest,path,iface,meth.toStringz()));
+    msg.build(args);
+    return conn.sendWithReplyBlocking(msg);
+  }
+
+  Connection conn;
+  const(char)* dest;
+  const(char)* path;
+  const(char)* iface;
+}
+
+unittest {
+  import dunit.toolkit;
+  Connection conn = connectToBus();
+  PathIface obj = new PathIface(conn, "org.freedesktop.DBus","/org/freedesktop/DBus",
+                                "org.freedesktop.DBus");
+  auto names = obj.GetNameOwner("org.freedesktop.DBus").to!string();
+  names.assertEqual("org.freedesktop.DBus");
+  obj.call!string("GetNameOwner","org.freedesktop.DBus").assertEqual("org.freedesktop.DBus");
+}

source/ddbus/thin.d

@@ -54,6 +54,7 @@ class Message {
     dbus_message_iter_init(msg, &iter);
     return readIter!T(&iter);
   }
+  alias read to;
 
   Tup readTuple(Tup)() if(isTuple!Tup && allCanDBus!(Tup.Types)) {
     DBusMessageIter iter;