Class IdUtil

include/matchit.h:1163–1179

                }
            };
            class IdUtil
            {
            public:
                template <typename Value>
                constexpr static auto bindValue(ValueVariant<Type> &v, Value &&value,
                                                     std::false_type /* StorePointer */)
                {
                    // for constexpr
                    v = ValueVariant<Type>{std::forward<Value>(value)};
                }
                template <typename Value>
                constexpr static auto bindValue(ValueVariant<Type> &v, Value &&value,
                                                     std::true_type /* StorePointer */)
                {
                    v = ValueVariant<Type>{&value};
                }
            };

            using BlockVT = std::variant<Block, Block *>;
            BlockVT mBlock = Block{};