Firstly:
[image: image.png]
for such kind of using C++

Second,

#ifdef TESTS_ENABLED
#define maybe_final final
#else
#define maybe_final
#endif

struct Abc maybe_final {

};

And, of course, you can use type erasure instead of virtual inheritance


пт, 10 нояб. 2023 г. в 05:22, Smith, Jim via Std-Proposals <
std-proposals_at_[hidden]>:

> Hi All,
>
> Test-driven development (TDD) is my de facto standard for writing
> software. On some projects I can't use TDD because interfaces introduce
> VTBL operation into the code. For me this is a serious issue.
>
> I've always used C++ interfaces i.e., classes with all pure virtual
> functions for TDD, especially when implementing a design patterns like
> Factory.
>
> I'm proposing a compiler option that will turn a virtual call through an
> interface, to a direct call on the object. For example,
>
> interface* i = Factory::Create();
>
> i->someVirtualFunc();
>
> In cases where single inheritance is used i->someVirtualFunc() would be
> optimized to a direct call on the object without any VTBL operation.
>
> This way the TDD code can use the standard VTBL operations, and in
> production builds a flag can be set to optimize it away. I can't do this
> myself without mentioning the concrete type created by the factory but the
> compiler can make the optimization.
>
>
> --James S.
>
>
> --
> Std-Proposals mailing list
> Std-Proposals_at_[hidden]
> https://lists.isocpp.org/mailman/listinfo.cgi/std-proposals
>