make_optional.h

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#pragma once
 
#include "di/meta/util.h"
#include "di/util/forward.h"
#include "di/vocab/optional/optional.h"
 
namespace di::vocab {
template<typename T>
constexpr auto make_optional(T&& value) {
    return Optional<meta::UnwrapRefDecay<T>> { util::forward<T>(value) };
}
 
template<typename T, typename... Args>
constexpr auto make_optional(Args&&... args) {
    return Optional<T>(types::in_place, util::forward<Args>(args)...);
}
}
 
namespace di {
using vocab::make_optional;
}