Issue 3062: Unnecessary decay_t in is_execution_policy_v should be remove_cvref_t

Title: Unnecessary decay_t in is_execution_policy_v should be remove_cvref_t
Status: c++20
Section: [algorithms.parallel.overloads]
Submitter: Billy O'Neal III

Created on 2018-02-07.00:00:00 last changed 38 months ago

Messages

msg9882 (view)

Date: 2018-06-12.01:05:16

Proposed resolution:

This wording is relative to N4713.

Modify [algorithms.parallel.overloads] as indicated:

-4- Parallel algorithms shall not participate in overload resolution unless is_execution_policy_v<decayremove_cvref_t<ExecutionPolicy>> is true.

msg9680 (view)

Date: 2018-06-12.01:05:16

[ 2018-06 Rapperswil: Adopted ]

msg9676 (view)

Date: 2018-02-13.00:00:00

[ 2018-02-13 Moved to Tentatively Ready after 7 positive votes on c++std-lib. ]

msg9675 (view)

Date: 2018-02-07.00:00:00

Our compiler throughput friends were hissing at us about throughput regressions in C++17 mode caused by the addition of the parallel algorithms' signatures. One change to reduce the throughput impact would be to remove unnecessary decay here, as LWG has done in other places recently.

History
Date	User	Action	Args
2021-02-25 10:48:01	admin	set	status: wp -> c++20
2018-06-12 01:05:16	admin	set	messages: + msg9882
2018-06-12 01:05:16	admin	set	status: voting -> wp
2018-05-06 19:23:13	admin	set	status: ready -> voting
2018-02-13 19:42:20	admin	set	messages: + msg9680
2018-02-13 19:42:20	admin	set	status: new -> ready
2018-02-08 19:23:45	admin	set	messages: + msg9676
2018-02-07 00:00:00	admin	create