indirectly_writable.h

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#pragma once
 
#include "di/container/meta/iterator_reference.h"
#include "di/util/forward.h"
 
namespace di::concepts {
template<typename Out, typename T>
concept IndirectlyWritable = requires(Out&& out, T&& value) {
    *out = util::forward<T>(value);
    *util::forward<Out>(out) = util::forward<T>(value);
    const_cast<meta::IteratorReference<Out> const&&>(*out) = util::forward<T>(value);
    const_cast<meta::IteratorReference<Out> const&&>(*util::forward<Out>(out)) = util::forward<T>(value);
};
}