This is an unofficial snapshot of the ISO/IEC JTC1 SC22 WG21 Core Issues List revision 114b. See http://www.open-std.org/jtc1/sc22/wg21/ for the official list.

2024-05-06


2825. Range-based for statement using a braced-init-list

Section: 8.6.5  [stmt.ranged]     Status: DR     Submitter: Arthur O'Dwyer     Date: 2023-11-08     Liaison: EWG

[Accepted as a DR at the March, 2024 meeting.]

Consider:

  for (int i : { 1, 2, 3 })  // argument-dependent lookup for begin(std::initializer_list<int>)
    /* ... */;

This is undesirable; instead, a member function begin should be preferred.

Proposed resolution (approved by CWG 2023-11-09):

Change in 8.6.5 [stmt.ranged] bullet 1.3 as follows:

begin-expr and end-expr are determined as follows:

Additional notes (November, 2023)

Forwarded to EWG via paper issue 1694 for confirmation of the design direction.

EWG 2023-11-09

Approved by EWG.