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// declare_reachable / undeclare_reachable example
#include <iostream>
#include <memory>
#include <cstdint>
int main() {
int * p = new int (1); // dynamic object
std::declare_reachable(p);
p = (int*)((std::uintptr_t)p ^ UINTPTR_MAX); // scrambling p
// dynamic object not reachable by any live safely-derived pointer
p = std::undeclare_reachable((int*)((std::uintptr_t)p ^ UINTPTR_MAX));
// p is back again a safely-derived pointer to the dynamic object
std::cout << "p: " << *p << '\n';
delete p;
return 0;
}
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