...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Return true
if calling deallocate
on
the memory resource has no effect.
bool is_deallocate_trivial() const noexcept;
This function is used to determine if the deallocate function of the pointed
to memory resource is trivial. The value of is_deallocate_trivial
is evaluated
and saved when the memory resource is constructed and the type is known,
before the type is erased.