concepts.hpp

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// Copyright (c) 2013-2018 Commissariat à l'énergie atomique et aux énergies alternatives (CEA)
// Copyright (c) 2013-2018 Centre national de la recherche scientifique (CNRS)
// Copyright (c) 2018-2022 Simons Foundation
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You may obtain a copy of the License at
//     https://www.gnu.org/licenses/gpl-3.0.txt
//
// Authors: Michel Ferrero, Olivier Parcollet, Nils Wentzell

 
#pragma once
 
#include <mpi/communicator.hpp>
 
#include <complex>
#include <concepts>
#include <utility>
 
namespace triqs::mc_tools {


  template <typename T>
  concept DoubleOrComplex = std::same_as<T, double> || std::same_as<T, std::complex<double>>;

  template <typename T, typename MCSignType>
  concept MCMove = requires(T x) {
    { x.attempt() } -> std::convertible_to<MCSignType>;
    { x.accept() } -> std::convertible_to<MCSignType>;
  };

  template <typename T, typename MCSignType>
  concept MCMeasure = requires(T x, mpi::communicator comm) {
    { x.accumulate(std::declval<MCSignType>()) };
    { x.collect_results(comm) };
  };

 
} // namespace triqs::mc_tools