Issue 1153: Standard library needs review for constructors to be explicit to avoid treatment as initializer-list constructor

Title: Standard library needs review for constructors to be explicit to avoid treatment as initializer-list constructor
Status: nad
Section: [library][thread][depr]
Submitter: LWG

Created on 2009-06-28.00:00:00 last changed 172 months ago

Messages

msg933 (view)

Date: 2010-10-21.18:28:33

Rationale:

We are unaware of any cases where initializer lists cause problem in this context, but if problems arise in the future the issue can be reopened.

msg932 (view)

Date: 2010-10-21.18:28:33

[ 2010 Pittsburgh: Moved to NAD, rationale added below. ]

msg931 (view)

Date: 2010-10-21.18:28:33

[ 2009 Santa Cruz: ]

Move to "Open". Robert Klarer has promised to provide wording.

msg930 (view)

Date: 2009-06-28.00:00:00

Addresses DE 2

Description

Marking a constructor with explicit has semantics even for a constructor with zero or several parameters: Such a constructor cannot be used with list-initialization in a copy-initialization context, see [over.match.list]. The standard library apparently has not been reviewed for marking non-single-parameter constructors as explicit.

Suggestion

Consider marking zero-parameter and multi-parameter constructors explicit in classes that have at least one constructor marked explicit and that do not have an initializer-list constructor.

Notes

Robert Klarer to address this one.

History
Date	User	Action	Args
2010-10-21 18:28:33	admin	set	messages: + msg933
2010-10-21 18:28:33	admin	set	messages: + msg932
2010-10-21 18:28:33	admin	set	messages: + msg931
2009-06-28 00:00:00	admin	create