https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88802
Bug ID: 88802
Summary: std::hash<std::nullptr_t> not implemented
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: tom at kera dot name
Target Milestone: ---
See https://stackoverflow.com/q/54147254/560648.
C++17 requires that std::hash<std::nullptr_t> be provided. MSVS does, but dev
libstdc++ doesn't (and neither does libc++). This seems to be the case on trunk
still.
#include <functional>
int main()
{
std::hash<std::nullptr_t> h;
return h(nullptr);
}
Result:
main.cpp: In function 'int main()':
main.cpp:4:31: error: use of deleted function
'std::hash<std::nullptr_t>::hash()'
std::hash<std::nullptr_t> h;
Expected result:
Good build and some return code.
