G4Filesystem.hh

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#ifndef G4FILESYSTEM_HH
#define G4FILESYSTEM_HH
/**
 * @namespace G4fs
 * Namespace adapter for `filesystem` in `std::` or `std::experimental::`
 *
 * Developers should use this namespace to scope into the C++ filesystem
 * library, e.g.
 *
 * ```cpp
 * // Don't use std:: directly...
 * auto p = std::filesystem::path{ argv[0] };
 *
 * // ... use the alias
 * auto p = G4fs::path{ argv[0] };
 * ```
 *
 * This allows compatibility with C++ standard libraries that only provide
 * `filesystem` in the `std::experimental` namespace
 *
 */
#if __has_include(<filesystem>)
#  include <filesystem>
namespace G4fs = std::filesystem;
#elif __has_include(<experimental/filesystem>)
#  include <experimental/filesystem>
namespace G4fs = std::experimental::filesystem;
#endif
 
#endif /* G4FILESYSTEM_HH */