Are C++ non-type parameters to (function) templates ordered?

template <typename TClassImpl, int32 TClassImpl::*mem>
JSBool JS_DLL_CALLBACK WriteProp(JSContext* cx, JSObject* obj, jsval id, jsval* vp)
{
	if (TClassImpl* pImpl = (TClassImpl*)::JS_GetInstancePrivate(cx, obj, &TClassImpl::s_JsClass, NULL))
		return ::JS_ValueToInt32(cx, *vp, &(pImpl->*mem));
	return JS_FALSE;
}

::JSPropertySpec Vec2::s_JsProps[] = {
	{"x", 1, JSPROP_PERMANENT, &JsWrap::ReadProp<Vec2, &Vec2::x>, &JsWrap::WriteProp<Vec2, &Vec2::x>},
	{"y", 2, JSPROP_PERMANENT, &JsWrap::ReadProp<Vec2, &Vec2::y>, &JsWrap::WriteProp<Vec2, &Vec2::y>},
	{0}
};

template <typename TClassImpl, JSObject* TClassImpl::*mem>
JSBool JS_DLL_CALLBACK WriteProp(JSContext* cx, JSObject* obj, jsval id, jsval* vp)
{
	if (TClassImpl* pImpl = (TClassImpl*)::JS_GetInstancePrivate(cx, obj, &TClassImpl::s_JsClass, NULL))
		return ::JS_ValueToObject(cx, *vp, &(pImpl->*mem));
	return JS_FALSE;
}

1>d:projectstestingjswndsrcmain.cpp(93) : error C2440: 'specialization' : cannot convert from 'int32 JsGlobal::Vec2::* ' to 'JSObject *JsGlobal::Vec2::* const '
1>        Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast
1>d:projectstestingjswndsrcmain.cpp(93) : error C2973: 'JsWrap::ReadProp' : invalid template argument 'int32 JsGlobal::Vec2::* '
1>        d:projectstestingjswndsrcwrap_js.h(64) : see declaration of 'JsWrap::ReadProp'
1>d:projectstestingjswndsrcmain.cpp(93) : error C2440: 'initializing' : cannot convert from 'overloaded-function' to 'JSPropertyOp'
1>        None of the functions with this name in scope match the target type

class Vec2
{
public:
	int32 x, y;

	Vec2(JSContext* cx, JSObject* obj, uintN argc, jsval* argv);

	static ::JSClass s_JsClass;
	static ::JSPropertySpec s_JsProps[];
};

typedef JSBool
(* JS_DLL_CALLBACK JSPropertyOp)(JSContext *cx, JSObject *obj, jsval id,
                                 jsval *vp);

...

struct JSPropertySpec {
    const char      *name;
    int8            tinyid;
    uint8           flags;
    JSPropertyOp    getter;
    JSPropertyOp    setter;
};

struct X
{
    int i;
    void* p;
};

template<int X::*P>
void foo(X* t)
{
    t->*P = 0;
}

template<void* X::*P>
void foo(X* t)
{
    t->*P = 0;
}

int main()
{
    X x;
    foo<&X::i>(&x);
    foo<&X::p>(&x);
}