This is an unofficial snapshot of the ISO/IEC JTC1 SC22 WG21 Core Issues List revision 115e. See http://www.open-std.org/jtc1/sc22/wg21/ for the official list.

2024-11-11

961. Overload resolution and conversion of std::nullptr_t to bool

[Voted into WP at March, 2010 meeting.]

Conversion of a pointer or pointer to member to bool is given special treatment as a tiebreaker in overload resolution in 12.2.4.3 [over.ics.rank] paragraph 4, bullet 1:

• A conversion that is not a conversion of a pointer, or pointer to member, to bool is better than another conversion that is such a conversion.

It would be reasonable to expect a similar provision to apply to conversions of std::nullptr_t to bool.

Proposed resolution (October, 2009):

Change 12.2.4.3 [over.ics.rank] bullet 4.1 as follows:

• A conversion that is not a conversion of does not convert a pointer, or a pointer to member, or std::nullptr_t to bool is better than another conversion that is such a conversion one that does.