text: // MIT License
  //
  // Copyright (c) 2019, The Regents of the University of California,
  // through Lawrence Berkeley National Laboratory (subject to receipt of any
  // required approvals from the U.S. Dept. of Energy).  All rights reserved.
  //
  // Permission is hereby granted, free of charge, to any person obtaining a copy
  // of this software and associated documentation files (the "Software"), to deal
  // in the Software without restriction, including without limitation the rights
  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  // copies of the Software, and to permit persons to whom the Software is
  // furnished to do so, subject to the following conditions:
  //
  // The above copyright notice and this permission notice shall be included in
  // all copies or substantial portions of the Software.
  //
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  // SOFTWARE.
  //
  
  /** \file functional.hpp
   * \headerfile functional.hpp "timemory/utility/functional.hpp"
   * This provides functions on types
   *
   */
  
  #pragma once
  
  //----------------------------------------------------------------------------//
  
  #include <algorithm>
  #include <cmath>
  #include <fstream>
  #include <functional>
  #include <iomanip>
  #include <iostream>
  #include <limits>
  
  #include "timemory/utility/macros.hpp"
  
  namespace tim
  {
  namespace func
  {
  template <bool _Condition, typename _Tp = int>
  using enable_if_t = typename std::enable_if<(_Condition), _Tp>::type;
  
  using std::max;
  using std::min;
  
  template <typename _Lhs, typename _Rhs>
  struct add
  {
      add(_Lhs& lhs, const _Rhs& rhs) { lhs += rhs; }
  };
  
  template <typename _Lhs, typename _Rhs>
  struct subtract
  {
      subtract(_Lhs& lhs, const _Rhs& rhs) { lhs -= rhs; }
  };
  
  template <typename _Lhs, typename _Rhs>
  struct multiply
  {
      multiply(_Lhs& lhs, const _Rhs& rhs) { lhs *= rhs; }
  };
  
  template <typename _Lhs, typename _Rhs>
  struct divide
  {
      divide(_Lhs& lhs, const _Rhs& rhs) { lhs /= rhs; }
  };
  
  }  // namespace func
  
  }  // namespace tim
  