This is an unofficial snapshot of the ISO/IEC JTC1 SC22 WG21 Core Issues List revision 112e. See http://www.open-std.org/jtc1/sc22/wg21/ for the official list.
Use of a decltype-specifier to name a destructor in an explicit destructor call is explicitly permitted in 11.4.7 [class.dtor] paragraph 13. However, the most straightforward attempt to do so, e.g.,
does not work, because *p is an lvalue and thus decltype(*p) is a reference type, not a class type. Even simply eliminating the reference is not sufficient, because p could be a pointer to a cv-qualified class type.
Either the provision for decltype-specifiers in explicit destructor calls should be removed or the specification should be expanded to allow reference and cv-qualified types to be considered as “denot[ing] the destructor's class type.”
Notes from the April, 2013 meeting:
CWG favored replacing the existing syntax with something more flexible, for example, p->~auto(). This new syntax would also apply to pseudo destructors.
Rationale (November, 2013):
CWG felt that the suggested change should be considered by EWG before the issue is resolved.
Additional note, April, 2015:
EWG has decided not to make a change in this area. See EWG issue 112.