CWG Issue 2913 (original) (raw)

This is an unofficial snapshot of the ISO/IEC JTC1 SC22 WG21 Core Issues List revision 118f. See http://www.open-std.org/jtc1/sc22/wg21/ for the official list.

2025-11-07

2913. Grammar for deduction-guide has requires-clause in the wrong position

Section: 13.7.2.3 [temp.deduct.guide]Status: CD7Submitter: Richard SmithDate: 2024-07-17

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

(From submission#576.)

Issue 2707 added the missing requires-clause to the grammar for deduction-guide, but the position is inconsistent with that of function declarations.

Proposed resolution (approved by CWG 2024-08-16):

Change in 13.7.2.3 [temp.deduct.guide] paragraph 1 as follows:

deduction-guide : explicit-specifieropt template-name ( parameter-declaration-clause ) requires-clauseopt -> simple-template-id requires-clauseopt ;