basic_facade_builder::support_relocationtemplate <constraint_level CL>
using support_relocation = basic_facade_builder</* see below */>;
The alias template support_relocation of basic_facade_builder<Cs, Rs, C> adds relocatability support to the template parameters, specifically C::relocatability. After the operation, C::relocatability becomes std::max(C::relocatability, CL).
If no relocatability support is applied before specifying build, the default value of build::constraints.relocatability is pro::constraint_level::nothrow.
#include <memory>
#include "proxy.h"
struct Movable : pro::facade_builder::build {};
struct Trivial : pro::facade_builder
::support_copy<pro::constraint_level::trivial>
::support_relocation<pro::constraint_level::trivial>
::support_destruction<pro::constraint_level::trivial>
::build {};
int main() {
pro::proxy<Movable> p1 = std::make_unique<int>(123);
// pro::proxy<Trivial> p2 = std::make_unique<int>(456); // Won't compile
double v = 3.14;
pro::proxy<Trivial> p3 = &v; // Compiles because double* is trivial
}