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1 // Copyright Toru Niina 2017.
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2 // Distributed under the MIT License.
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3 #ifndef TOML11_STORAGE_HPP
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4 #define TOML11_STORAGE_HPP
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5 #include "utility.hpp"
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6
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7 namespace toml
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8 {
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9 namespace detail
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10 {
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11
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12 // this contains pointer and deep-copy the content if copied.
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13 // to avoid recursive pointer.
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14 template<typename T>
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15 struct storage
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16 {
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17 using value_type = T;
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18
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19 explicit storage(value_type const& v): ptr(toml::make_unique<T>(v)) {}
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20 explicit storage(value_type&& v): ptr(toml::make_unique<T>(std::move(v))) {}
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21 ~storage() = default;
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22 storage(const storage& rhs): ptr(toml::make_unique<T>(*rhs.ptr)) {}
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23 storage& operator=(const storage& rhs)
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24 {
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25 this->ptr = toml::make_unique<T>(*rhs.ptr);
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26 return *this;
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27 }
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28 storage(storage&&) = default;
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29 storage& operator=(storage&&) = default;
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30
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31 bool is_ok() const noexcept {return static_cast<bool>(ptr);}
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32
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33 value_type& value() & noexcept {return *ptr;}
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34 value_type const& value() const& noexcept {return *ptr;}
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35 value_type&& value() && noexcept {return std::move(*ptr);}
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36
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37 private:
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38 std::unique_ptr<value_type> ptr;
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39 };
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40
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41 } // detail
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42 } // toml
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43 #endif// TOML11_STORAGE_HPP
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