16 Library introduction [library]

16.4 Library-wide requirements [requirements]

16.4.6 Conforming implementations [conforming]

16.4.6.14 Restrictions on storage of pointers [res.on.pointer.storage]

Objects constructed by the standard library that may hold a user-supplied pointer value or an integer of type std​::​intptr_­t shall store such values in a traceable pointer location ([basic.stc.dynamic.safety]).