.. _program_listing_file_src_navtk_fs_filesystem.hpp:

Program Listing for File filesystem.hpp
=======================================

|exhale_lsh| :ref:`Return to documentation for file <file_src_navtk_fs_filesystem.hpp>` (``src/navtk/fs/filesystem.hpp``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   #pragma once
   
   // This file allows for a filesystem to be robustly included across multiple environments.
   
   #ifdef NAVTK_STD_HAS_FILESYSTEM_HEADER
   #   include <filesystem>
   #elif defined(NAVTK_STD_EXPERIMENTAL_FILESYSTEM_HEADER)
   #   include <experimental/filesystem>
   #elif defined(__has_include) && __has_include("filesystem")
   #   include <filesystem>
   #else
   #   include <experimental/filesystem>
   #endif
   
   #ifdef NAVTK_STD_FILESYSTEM_NAMESPACE
   // When NAVTK_STD_FILESYSTEM_NAMESPACE is defined, it should contain the namespace your compiler
   // uses for the filesystem library. If you don't know, the #else below is a generic fallback that
   // should work on most compilers.
   namespace navtk {
   namespace fs = NAVTK_STD_FILESYSTEM_NAMESPACE;
   }
   #else
   // This works by creating a new `navtk::fs` namespace (rather than aliasing an existing namespace),
   // and just populating that namespace with the contents of other namespaces that might exist
   // depending on how filesystem is implemented in your libc++. Because the system libraries won't
   // provide all of them, we declare the std namespaces we intend to try here ourselves before
   // referencing them in the usings.
   namespace std {
   namespace filesystem {}
   namespace experimental {
   namespace filesystem {}
   }  // namespace experimental
   namespace __fs {
   namespace filesystem {}
   }  // namespace __fs
   }  // namespace std
   
   namespace navtk {
   namespace fs {
   using namespace ::std::experimental::filesystem;
   using namespace ::std::__fs::filesystem;
   using namespace ::std::filesystem;
   }  // namespace fs
   }  // namespace navtk
   #endif