Il 21/02/20 11:25, Daniel Krügler via Std-Discussion ha scritto:
>> OK. Can we say it was*against* C++11 but then it was only resolved for
>> C++17?
> Yes. AFAIK, there exists no defined process for the standard that
> applies fixes made in a later standard to previous standards.
>

However, in general, aren't defect resolutions supposed to be applied
retroactively? Sure, are no means to republishing an already-issued
Standard including the resolutions; but implementations are supposed to
pick them up.

Other examples:

* having multiple return statements in lambda bodies is allowed in C++11
even without a trailing return type (CWG975 resolution);

* auto x{123} is supposed to be int even when compiling in C++11 mode on
compilers implementing N3922 (as the old behavior, deducing
std::initializer_list<int>, was considered to be a defect).

My 2 c,

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