wg21.cmeerw.net

Title
Deducing cv-qualified auto

Status
cd3

Section
9.2.9.7 [dcl.spec.auto]

Submitter
Jens Maurer

Created on 2012-11-18.00:00:00 last changed 152 months ago

Messages

Date: 2013-04-15.00:00:00

Proposed resolution (April, 2013):

This issue is resolved by the wording changes in N3638, adopted at the April, 2013 (Bristol) meeting.

Date: 2012-11-18.00:00:00

In an example like

  const auto x = 3;

the intent, clearly, is to make const int the type of x . It is not clear, however, that the current wording accomplishes this. Because the deduction is based on that of function calls, and because top-level cv-qualifiers are ignored in such deduction, it appears that 9.2.9.7 [dcl.spec.auto] paragraph 6,

The type deduced for the variable d is then the deduced A determined using the rules of template argument deduction from a function call (13.10.3.2 [temp.deduct.call]), where P is a function template parameter type and the initializer for d is the corresponding argument.

incorrectly gives x the type int .

History
Date User Action Args
2014-03-03 00:00:00adminsetstatus: drwp -> cd3
2013-10-14 00:00:00adminsetstatus: dr -> drwp
2013-05-03 00:00:00adminsetmessages: + msg4401
2013-05-03 00:00:00adminsetstatus: open -> dr
2012-11-18 00:00:00admincreate

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