Attribute Macro one_user::one_user

#[one_user]

A macro that generates structs for limiting “users”

SOUNDNESS: The struct this is attached to MUST NOT have any impls with functions that return Self, those functions MUST BE replaced with functions that return the Unbound struct generated by this macro. This also includes traits like Default, which become impossible to implement soundly, this means the struct this is applied on MUST NOT derive or impl Default or other traits that have functions that return Self.