These days I am writing a lot of C++11 code. I find that I write two different kinds of objects:

1. copyable objects like

    class RGB { int r, g, b };

2. big complex things that should never copy but can move

    class Foo { Foo(const Foo&) = delete; };

In case of (1), I don't care if move or copy constructors are used and I am happy that the compiler will decide. In case of (2), if by accident I invoke a copy constructor, I end up getting a compile-time error.