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

1394. Incomplete types as parameters of deleted functions

[Moved to DR at the October, 2012 meeting.]

Currently, 9.3.4.6 [dcl.fct] paragraph 9 requires that

The type of a parameter or the return type for a function definition shall not be an incomplete class type (possibly cv-qualified) unless the function definition is nested within the member-specification for that class (including definitions in nested classes defined within the class).

There is no reason for this requirement for a function with a deleted definition, and it would be useful to relax this prohibition in such cases.

Proposed resolution (February, 2012):

Change 9.3.4.6 [dcl.fct] paragraph 9 as follows:

Types shall not be defined in return or parameter types. The type of a parameter or the return type for a function definition shall not be an incomplete class type (possibly cv-qualified) unless the function is deleted (9.5.3 [dcl.fct.def.delete]) or the definition is nested within the member-specification for that class (including definitions in nested classes defined within the class).