--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/qt/qtd/MetaMarshall.d	Sun Nov 08 19:28:01 2009 +0000
@@ -0,0 +1,57 @@
+module qt.qtd.MetaMarshall;
+
+import std.traits;
+
+template isQObjectType(T) // is a QObject type that belongs to the library
+{
+    enum isQObjectType = is(typeof(mixin("T." ~ "__isQObjectType")));
+}
+
+template isObjectType(T) // is a QObject type that belongs to the library
+{
+    enum isQObjectType = is(typeof(mixin("T." ~ "__isObjectType")));
+}
+
+template isValueType(T) // is a QObject type that belongs to the library
+{
+    enum isQObjectType = is(typeof(mixin("T." ~ "__isValueType")));
+}
+
+template isNativeType(T) // type that doesn't require conversion i.e. is the same in C++ and D
+{
+    enum isNativeType = isNumeric!T || is(T == bool);
+}
+
+// converts an argumnent from C++ to D in qt_metacall
+string metaCallArgument(T)(string ptr)
+{
+    static if (isQObjectType!T)
+        return T.stringof ~ ".__getObject(*cast(void**)(" ~ ptr ~ "))";
+    else static if (isNativeType!T)
+        return "*(cast(" ~ T.stringof ~ "*)" ~ ptr ~ ")";
+    else
+        return "*(cast(" ~ T.stringof ~ "*)" ~ ptr ~ ")";
+        //res = T.stringof;
+}
+
+// converts a D argument type to C++ for registering in Qt meta system
+string qtDeclArg(T)()
+{
+    static if (isQObjectType!T)
+        return T.stringof ~ "*";
+    else static if (isNativeType!T)
+        return T.stringof;
+    else
+        return T.stringof;
+}
+
+// converts an argument from D to C++ in a signal emitter
+string convertSignalArgument(T)(string arg)
+{
+    static if (isQObjectType!T)
+        return arg ~ ".__nativeId";
+    else static if (isNativeType!T)
+        return arg;
+    else
+        return arg;
+}