Re: [Qemu-devel] [RFC] [tcg] Idea on refactoring target code generation loop (gen_intermediate_code)

[Paolo Bonzini <pbonzini@redhat.com>]

On 07/04/2016 16:49, Peter Maydell wrote:
> > QOM to C++ classes
> I suspect if you looked at this you'd find that the QOM semantics
> for various things don't map onto C++ (ie that we have more runtime
> flexibility than C++ does).

True, but you don't have to use it. :)  If your code is static, one
could imagine bindings to C++ that eliminate some of the boilerplate.
Don't look at me, though.

On the other hand, minimal usage of templates instead of some of the
preprocessor gunk we have would be a very good thing IMNSHO.  I am
referring to the multiply included header files and to the macros with
type arguments (mostly QOM casts).

I don't think we need more C++ than that, but using templates as
basically a type-safe preprocessor would improve QEMU a little bit.
More rarely, lambdas could replace some preprocessor magic too, but
that's C11 and not many compilers support them.

But I won't weep if people say no because we have a lot other
low-hanging fruit to make QEMU better (especially the header file
cleanups that Markus started and I want to conclude very early in 2.7).

Paolo

> This is just vaguely remembered from
> discussions back when we first added QOM though, I have no specific
> detail and might have misremembered.