This is an unofficial snapshot of the ISO/IEC JTC1 SC22 WG21 Core Issues List revision 116a. See http://www.open-std.org/jtc1/sc22/wg21/ for the official list.

2024-12-19

948. constexpr in conditions

[Voted into WP at August, 2010 meeting.]

The grammar for condition in 8.5 [stmt.select] paragraph 1 does not allow for the constexpr specifier. This was not intended by the original proposal.

Proposed resolution (March, 2010):

1. Change the definition of condition in 8.5 [stmt.select] paragraph 1 as follows:

condition:
expression
attribute-specifier_opt typedecl-specifier-seq declarator = initializer-clause
attribute-specifier_opt typedecl-specifier-seq declarator braced-init-list

2. Insert the following text as a new paragraph at the end of 8.5 [stmt.select]:

In the decl-specifier-seq of a condition, each decl-specifier shall be either a type-specifier or constexpr.