Created on 2022-12-14.00:00:00 last changed 3 weeks ago
This wording is relative to N4917.
Modify , header <version> synopsis, as indicated:
-2- Each of the macros defined in <version> is also defined after inclusion of any member of the set of library headers indicated in the corresponding comment in this synopsis.[Note 1: Future revisions of C++ might replace the values of these macros with greater values. — end note]
// all freestanding#define __cpp_lib_addressof_constexpr 201603L // also in <memory> […]
[ 2023-01-06; Reflector poll ]
Set status to Tentatively Ready after eight votes in favour during reflector poll.
It's reasonable for the <version> header to be required for freestanding, so that users can include it and see the "implementation-dependent information … (e.g. version number and release date)", and also to ask which features are present (which is the real intended purpose of <version>). It seems less reasonable to require every macro to be present on freestanding implementations, even the ones that correspond to non-freestanding features.P2198R7 will fix this situation for C++26, but we should also do something for C++23 before publishing it. It seems sensible not to require any of the macros to be present, and then allow implementations to define them for the features that they support.
|2023-01-06 14:39:29||admin||set||messages: + msg13168|
|2023-01-06 14:39:29||admin||set||status: new -> ready|
|2022-12-17 13:48:15||admin||set||messages: + msg13157|