C++ extension "cast-as-lvalues": time to deprecate?

[Nathan Sidwell]

Matt Austern wrote:

> We said it was deprecated in the documentation, but we never enforced
> that with a warning.  I think the schedule for removal will have to
> look something like this:
>  - Next release: put in a warning for this extension, and allow users
>    to turn it off with a switch.
>  - The release after that: don't allow users to turn the warning off.
>  - Finally, in the next release: remove it entirely.
> 
> I could imagine doing this over the course of two releases instead
> of three, but two is the absolute minimum.
Normal practice for g++ at least appears to be two, add a warning in
release N, remove it in N+1

nathan

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