Line data    Source code

       1             : /* +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
       2             :    Copyright (c) 2017-2023 The plumed team
       3             :    (see the PEOPLE file at the root of the distribution for a list of names)
       4             : 
       5             :    See http://www.plumed.org for more information.
       6             : 
       7             :    This file is part of plumed, version 2.
       8             : 
       9             :    plumed is free software: you can redistribute it and/or modify
      10             :    it under the terms of the GNU Lesser General Public License as published by
      11             :    the Free Software Foundation, either version 3 of the License, or
      12             :    (at your option) any later version.
      13             : 
      14             :    plumed is distributed in the hope that it will be useful,
      15             :    but WITHOUT ANY WARRANTY; without even the implied warranty of
      16             :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      17             :    GNU Lesser General Public License for more details.
      18             : 
      19             :    You should have received a copy of the GNU Lesser General Public License
      20             :    along with plumed.  If not, see <http://www.gnu.org/licenses/>.
      21             : +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ */
      22             : #ifndef __PLUMED_tools_ForwardDecl_h
      23             : #define __PLUMED_tools_ForwardDecl_h
      24             : 
      25             : #include <memory>
      26             : #include <utility>
      27             : 
      28             : namespace PLMD {
      29             : 
      30             : /**
      31             :   Utility class for forward declaration of references.
      32             : 
      33             : */
      34             : template <class T>
      35     2440793 : class ForwardDecl:
      36             :   std::unique_ptr<T>
      37             : {
      38             : public:
      39             : // Construction with arbitrary argument.
      40             :   template<typename ...Args>
      41             :   explicit ForwardDecl(Args &&...args);
      42             : // Dereference operator is inherited from std::unique_ptr<T>
      43             :   using std::unique_ptr<T>::operator *;
      44             : };
      45             : 
      46             : template <class T>
      47             : template<typename ...Args>
      48     4867367 : ForwardDecl<T>::ForwardDecl(Args &&...args):
      49     4867367 :   std::unique_ptr<T>(new T(std::forward<Args>(args)...))
      50     4867367 : {}
      51             : 
      52             : 
      53             : }
      54             : 
      55             : #endif