[P0475R1](https://wg21.link/P0475R1) Guaranteed Copy Elision For Piecewise Construction This should be implemented together with #20, [P0591R4](https://wg21.link/P0591R4) Utility Functions For Uses-Allocator Construction.
P0475R1 Guaranteed Copy Elision For Piecewise Construction
This should be implemented together with #20, P0591R4 Utility Functions For Uses-Allocator Construction.