Geant4 Cross Reference

Cross-Referencing   Geant4
Geant4/global/management/include/G4Filesystem.hh

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  1 //
  2 // ********************************************************************
  3 // * License and Disclaimer                                           *
  4 // *                                                                  *
  5 // * The  Geant4 software  is  copyright of the Copyright Holders  of *
  6 // * the Geant4 Collaboration.  It is provided  under  the terms  and *
  7 // * conditions of the Geant4 Software License,  included in the file *
  8 // * LICENSE and available at  http://cern.ch/geant4/license .  These *
  9 // * include a list of copyright holders.                             *
 10 // *                                                                  *
 11 // * Neither the authors of this software system, nor their employing *
 12 // * institutes,nor the agencies providing financial support for this *
 13 // * work  make  any representation or  warranty, express or implied, *
 14 // * regarding  this  software system or assume any liability for its *
 15 // * use.  Please see the license in the file  LICENSE  and URL above *
 16 // * for the full disclaimer and the limitation of liability.         *
 17 // *                                                                  *
 18 // * This  code  implementation is the result of  the  scientific and *
 19 // * technical work of the GEANT4 collaboration.                      *
 20 // * By using,  copying,  modifying or  distributing the software (or *
 21 // * any work based  on the software)  you  agree  to acknowledge its *
 22 // * use  in  resulting  scientific  publications,  and indicate your *
 23 // * acceptance of all terms of the Geant4 Software license.          *
 24 // ********************************************************************
 25 #ifndef G4FILESYSTEM_HH
 26 #define G4FILESYSTEM_HH
 27 /**
 28  * @namespace G4fs
 29  * Namespace adapter for `filesystem` in `std::` or `std::experimental::`
 30  *
 31  * Developers should use this namespace to scope into the C++ filesystem
 32  * library, e.g.
 33  *
 34  * ```cpp
 35  * // Don't use std:: directly...
 36  * auto p = std::filesystem::path{ argv[0] };
 37  *
 38  * // ... use the alias
 39  * auto p = G4fs::path{ argv[0] };
 40  * ```
 41  *
 42  * This allows compatibility with C++ standard libraries that only provide
 43  * `filesystem` in the `std::experimental` namespace
 44  *
 45  */
 46 #if __has_include(<filesystem>)
 47 #  include <filesystem>
 48 namespace G4fs = std::filesystem;
 49 #elif __has_include(<experimental/filesystem>)
 50 #  include <experimental/filesystem>
 51 namespace G4fs = std::experimental::filesystem;
 52 #endif
 53 
 54 #endif /* G4FILESYSTEM_HH */