[catnaroek]

Cello and C++ are have very different design goals. Cello is essentially a dynamic language implementation on top of C, and uses runtime reflection in places where a C++ programmer would probably prefer compile-time template hackery.

[int_19h]

Idiomatic C++ is not like Cello at all. But it still allows you to do all things that Cello does - and most of them wouldn't be macros then, but classes and overloaded operators on them.

[catnaroek]

Somehow I doubt C++'s built-in object system will allow you to create classes (yes, classes, not objects) and/or alter their vtables at runtime. (I know, vtables are an implementation detail. You still get the idea.)

[int_19h]

Not anymore so than the C one - it's just as static.

The point is that building blocks that you get from C++ are higher-level even so - classes, operator overloading, template metaprogramming etc - which should make it possible to implement something like Cello with a lot less effort (and hacks).