bsl::allocator<void*>::operator=

Modify this allocator to use the same mechanism as the specified rhs allocator and return a modifiable reference to this object. Note that bsl::allocator objects should never be assigned at runtime, but, in the absence of if constexpr, such assignments can sometimes be found legitimately in dead branches (branches that are never taken at runtime) within function templates; ideally, such code would be replaced by more sophisticated metaprogramming that avoided calls to this operator entirely. Invoking this assignment will result in a review error unless rhs == *this, i.e., when the assignment would be a no-op. In the future, the review error may be replaced with an a hard assertion failure.