101 struct ValueUnion {  struct
102   union DataT {
108   using DataPtr = std::unique_ptr<DataT, decltype(&std::free)>;
111   std::size_t size;
112   DataPtr buff;
115   ValueUnion() : size(0), buff(nullptr, &std::free) {}  in ValueUnion()  function
117   explicit ValueUnion(std::size_t buff_size)  in ValueUnion()  function
123   explicit operator bool() const { return bool(buff); }  in operator bool()
125   char* data() const { return buff->bytes; }  in data()
127   std::string GetAsString() const { return std::string(data()); }  in GetAsString()
129   int64_t GetAsInteger() const {  in GetAsInteger()
138   std::array<T, N> GetAsArray() {  in GetAsArray()