std::pmr::null_memory_resource

std::pmr::memory_resource* null_memory_resource() noexcept;

Returns a pointer to a memory_resource that doesn't perform any allocation.

Return value

Returns a pointer p to a static storage duration object of a type derived from std::pmr::memory_resource, with the following properties:

• its allocate() function always throws std::bad_alloc;
• its deallocate() function has no effect;
• for any memory_resource r, p->is_equal(r) returns &r == p.

The same value is returned every time this function is called.