hasher.h

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#pragma once
 
#include "di/types/prelude.h"
#include "di/vocab/span/prelude.h"
 
namespace di::concepts {
template<typename T>
concept Hasher = requires(T& hasher, vocab::Span<byte const> data) {
    { hasher.write(data) } -> SameAs<void>;
    { hasher.finish() } -> SameAs<u64>;
};
}
 
namespace di {
using concepts::Hasher;
}