[docs] [issue10977] Concrete object C API considered harmful to subclasses of builtin types

[Antoine Pitrou]

Antoine Pitrou added the comment:

> > To be clear: the problem is with CPython calling the concrete APIs when
> > it shouldn't, rather than with the concrete APIs not behaving properly.
> 
> The boilerplate required to use them correctly renders them broken in my
> view, particularly when they silently corrupt internal subclass state when
> misused instead of throwing an exception.

IMO the boilerplate should actually be included inside the abstract
APIs, so as to automatically enable optimized shortcuts when possible.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue10977>
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