This is an unofficial snapshot of the ISO/IEC JTC1 SC22 WG21 Core Issues List revision 112e. See for the official list.


1379. Is std::initializer_list an aggregate?

Section: 9.4.5  [dcl.init.list]     Status: NAD     Submitter: Daniel Krügler     Date: 2011-08-21

The Standard does not specify whether std::initializer_list may be an aggregate or not. Strictly speaking, the order of the bullets in 9.4.5 [dcl.init.list] paragraph 3 depends on the answer. The existence of a constructor declaration in 17.10 [support.initlist] suggests that it is not an aggregate but does not say so definitively.

Rationale (February, 2012):

The presence of the constructor declaration in 17.10 [support.initlist] is sufficient to establish that std::initializer_list is not an aggregate.