Title
Simplify restrictions on built-in assignment operator candidates
Status
drwp
Section
12.2.2.3 [over.match.oper]
Submitter
Brian Bi

Created on 2023-03-24.00:00:00 last changed 3 months ago

Messages

Date: 2023-06-13.16:07:02

Proposed resolution (approved by CWG 2023-03-30):

Change in 12.2.2.3 [over.match.oper] paragraph 5 as follows:

For the first parameter of the built-in assignment operators, only standard conversion sequences (12.2.4.2.2 [over.ics.scs]) are considered. conversions of the left operand are restricted as follows:
  • no temporaries are introduced to hold the left operand, and
  • no user-defined conversions are applied to the left operand to achieve a type match with the left-most parameter of a built-in candidate.
Date: 2023-06-15.00:00:00

[Accepted as a DR at the June, 2023 meeting.]

Subclause 12.2.2.3 [over.match.oper] paragraph 5 specifies:

For the built-in assignment operators, conversions of the left operand are restricted as follows:
  • no temporaries are introduced to hold the left operand, and
  • no user-defined conversions are applied to the left operand to achieve a type match with the left-most parameter of a built-in candidate.

The first bullet is redundant, because standard conversion sequences cannot bind "vq T&" (the type of the first parameter of a built-in assignment operator) to a temporary.

History
Date User Action Args
2023-12-19 10:15:28adminsetstatus: dr -> drwp
2023-07-16 13:00:43adminsetstatus: ready -> dr
2023-03-31 21:41:42adminsetstatus: open -> ready
2023-03-30 22:02:10adminsetmessages: + msg7238
2023-03-24 00:00:00admincreate