Method operator()

include/matchit.h:49–52

            constexpr explicit MatchHelper(V &&value) : mValue{std::forward<V>(value)} {}
            template <typename... PatternPair>
            constexpr auto operator()(PatternPair const &...patterns)
            {
                return matchPatterns(std::forward<ValueRefT>(mValue), patterns...);
            }
        };

        template <typename Value>