FM / mapbox

/usr/local/include/mapbox

Name	Size	Mode	Actions
optional.hpp	1575	0644	edit dl rm
recursive_wrapper.hpp	2632	0644	edit dl rm
variant.hpp	31575	0644	edit dl rm
variant_io.hpp	912	0644	edit dl rm
variant_visitor.hpp	743	0644	edit dl rm

Edit: /usr/local/include/mapbox/optional.hpp (1575B)

#ifndef MAPBOX_UTIL_OPTIONAL_HPP
#define MAPBOX_UTIL_OPTIONAL_HPP

#pragma message("This implementation of optional is deprecated. See https://github.com/mapbox/variant/issues/64.")

#include <type_traits>
#include <utility>

#include <mapbox/variant.hpp>

namespace mapbox {
namespace util {

template <typename T>
class optional
{
    static_assert(!std::is_reference<T>::value, "optional doesn't support references");

struct none_type
    {
    };

variant<none_type, T> variant_;

public:
    optional() = default;

optional(optional const& rhs)
    {
        if (this != &rhs)
        { // protect against invalid self-assignment
            variant_ = rhs.variant_;
        }
    }

optional(T const& v) { variant_ = v; }

explicit operator bool() const noexcept { return variant_.template is<T>(); }

T const& get() const { return variant_.template get<T>(); }
    T& get() { return variant_.template get<T>(); }

T const& operator*() const { return this->get(); }
    T operator*() { return this->get(); }

optional& operator=(T const& v)
    {
        variant_ = v;
        return *this;
    }

optional& operator=(optional const& rhs)
    {
        if (this != &rhs)
        {
            variant_ = rhs.variant_;
        }
        return *this;
    }

template <typename... Args>
    void emplace(Args&&... args)
    {
        variant_ = T{std::forward<Args>(args)...};
    }

void reset() { variant_ = none_type{}; }

}; // class optional

} // namespace util
} // namespace mapbox

#endif // MAPBOX_UTIL_OPTIONAL_HPP

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