AlgoTraits.h

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/* Copyright (C) 2024 FIAS Frankfurt Institute for Advanced Studies, Frankfurt / Main
   SPDX-License-Identifier: GPL-3.0-only
   Authors: Felix Weiglhofer [committer] */
 
#pragma once
 
#include <tuple>
#include <type_traits>
 
namespace cbm::algo::algo_traits
{
 
  namespace detail
  {
    template<typename...>
    struct ResultOf {
    };
 
    template<typename R, typename Algo, typename... Args>
    struct ResultOf<R (Algo::*)(Args...) const> {
      using type = R;
    };
 
    template<typename R, typename Algo, typename... Args>
    struct ResultOf<R (Algo::*)(Args...)> {
      using type = R;
    };
 
    template<typename Algo>
    struct ResultOf<Algo> : ResultOf<decltype(&Algo::operator())> {
    };
 
  }  // namespace detail
 
  template<typename Algo>
  using ResultOf_t = typename detail::ResultOf<Algo>::type;
 
  // Currently assume algorithms return std::tuple<R, M, A>
  // where R is the output, M is the monitoring data and A is auxiliary data
 
  template<typename Algo>
  using Output_t = typename std::tuple_element<0, ResultOf_t<Algo>>::type;
 
  template<typename Algo>
  using Monitor_t = typename std::tuple_element<1, ResultOf_t<Algo>>::type;
 
  template<typename Algo>
  using Aux_t = typename std::tuple_element<2, ResultOf_t<Algo>>::type;
 
}  // namespace cbm::algo::algo_traits