guarded_reference.h

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#pragma once
 
#include "di/meta/operations.h"
#include "di/util/forward.h"
 
namespace di::util {
template<typename T, typename Guard>
class GuardedReference {
public:
    template<typename... Args>
    requires(concepts::ConstructibleFrom<Guard, Args...>)
    constexpr explicit GuardedReference(T& value, Args&&... args)
        : m_guard(util::forward<Args>(args)...), m_value(&value) {}
 
    constexpr auto operator*() const -> T& { return *m_value; }
    constexpr auto operator->() const -> T* { return m_value; }
 
private:
    Guard m_guard;
    T* m_value;
};
}
 
namespace di {
using util::GuardedReference;
}