Function measure_one

extlibs/catch/include/catch/catch.hpp:6640–6642

        namespace Detail {
            template <typename Clock, typename Fun>
            TimingOf<Clock, Fun(int)> measure_one(Fun&& fun, int iters, std::false_type) {
                return Detail::measure<Clock>(fun, iters);
            }
            template <typename Clock, typename Fun>
            TimingOf<Clock, Fun(Chronometer)> measure_one(Fun&& fun, int iters, std::true_type) {
                Detail::ChronometerModel<Clock> meter;