IsDetected.h

/**************************************************************************
 * basf2 (Belle II Analysis Software Framework)                           *
 * Author: The Belle II Collaboration                                     *
 *                                                                        *
 * See git log for contributors and copyright holders.                    *
 * This file is licensed under LGPL-3.0, see LICENSE.md.                  *
 **************************************************************************/
#pragma once
 
#include <type_traits>
 
namespace Belle2 {
  namespace TrackFindingCDC {
 
    template<typename... Ts>
    using ToVoid = void;
 
    template<typename, template<typename...> class, typename...>
    struct DetectPropertyImpl : std::false_type {};
 
    template<template<class...> class AToPredicate, typename... Ts>
    struct DetectPropertyImpl<ToVoid<AToPredicate<Ts...>>, AToPredicate, Ts...> : std::true_type {};
 
    template<template<class...> class AToPredicate, typename... Ts>
    constexpr bool isDetected()
    {
      return DetectPropertyImpl<ToVoid<>, AToPredicate, Ts...>::value;
    }
  }
}