Issue 3217 - WG21 LWG Issues
Title
<memory> and <execution> should define __cpp_lib_parallel_algorithm
Status
resolved
Section
[support.limits.general]
Submitter
Jonathan Wakely

Created on 2019-06-12.00:00:00 last changed yesterday

Messages

msg16406 (view)
Date: 2026-06-10.12:02:10

Proposed resolution:

This wording is relative to N4810.

  1. Modify [support.limits.general], Table 36 — "Standard library feature-test macros", as indicated:

    Table 36 — Standard library feature-test macros
    Macro name Value Header(s)
    […]
    __cpp_lib_parallel_algorithm 201603L <algorithm> <execution> <memory> <numeric>
    […]
msg10499 (view)
Date: 2026-06-10.12:02:10

[ Brno 2026-06-10; Status changed: New → Resolved by P3179R9. ]
msg10442 (view)
Date: 2019-08-23.18:06:54

[ 2019-07 Issue Prioritization ]

Priority to 3 after discussion on the reflector.
msg10441 (view)
Date: 2019-06-12.00:00:00

There are parallel overloads of algorithms in <memory>, so it should define the macro. Also, <execution> defines the exec policies for use with the algos, so that should define the macro too.

History
Date User Action Args
2026-06-10 12:02:10adminsetmessages: + msg16406
2026-06-10 12:02:10adminsetstatus: new -> resolved
2019-07-23 15:26:26adminsetmessages: + msg10499
2019-06-13 21:05:14adminsetmessages: + msg10442
2019-06-12 00:00:00admincreate