void.h

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#pragma once
 
#include "di/types/strong_ordering.h"
 
namespace di::types {
struct Void {
    constexpr friend auto operator==(Void, Void) -> bool { return true; }
    constexpr friend auto operator<=>(Void, Void) -> types::strong_ordering { return types::strong_ordering::equal; }
};
struct Void {…};
}
 
namespace di {
using types::Void;
}