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
[Moved to DR at the November, 2014 meeting.]
According to 9.5.2 [dcl.fct.def.default] paragraph 2,
An explicitly-defaulted function may be declared constexpr only if it would have been implicitly declared as constexpr.
However, the rules for determining whether a function is constexpr and its exception-specification depend on the definition of function and do not apply to deleted functions. Can an explicitly-defaulted implicitly-deleted function be declared constexpr or have an exception-specification, and if so, how is its correctness to be determined?
Proposed resolution (February, 2014):
Change 9.5.2 [dcl.fct.def.default] paragraph 2 as follows:
An explicitly-defaulted function that is not defined as deleted may be declared constexpr only if it would have been implicitly declared as constexpr.