*
   * <p>The returned traverser attempts to avoid following symbolic links to directories. However,
   * the traverser cannot guarantee that it will not follow symbolic links to directories as it is
   * possible for a directory to be replaced with a symbolic link between checking if the file is a
   * directory and actually reading the contents of that directory.
   *

   *
   * <p>The returned traverser attempts to avoid following symbolic links to directories. However,
   * the traverser cannot guarantee that it will not follow symbolic links to directories as it is
   * possible for a directory to be replaced with a symbolic link between checking if the file is a
   * directory and actually reading the contents of that directory.
   *

   *
   * <p><b>Warning:</b> {@code File} provides no support for symbolic links, and as such there is no
   * way to ensure that a symbolic link to a directory is not followed when traversing the tree. In
   * this case, iterables created by this traverser could contain files that are outside of the
   * given directory or even be infinite if there is a symbolic link loop.
   *

   *
   * <p><b>Warning:</b> {@code File} provides no support for symbolic links, and as such there is no
   * way to ensure that a symbolic link to a directory is not followed when traversing the tree. In
   * this case, iterables created by this traverser could contain files that are outside of the
   * given directory or even be infinite if there is a symbolic link loop.
   *

	TypeReg = '0'

	// Deprecated: Use TypeReg instead.
	TypeRegA = '\x00'

	// Type '1' to '6' are header-only flags and may not have a data body.
	TypeLink    = '1' // Hard link
	TypeSymlink = '2' // Symbolic link
	TypeChar    = '3' // Character device node
	TypeBlock   = '4' // Block device node
	TypeDir     = '5' // Directory
	TypeFifo    = '6' // FIFO node

	// Type '7' is reserved.
	TypeCont = '7'

      assertFalse(MoreFiles.isRegularFile(NOFOLLOW_LINKS).apply(symlinkToFile));
    }
  }

  /**
   * Creates a new file system for testing that supports the given features in addition to
   * supporting symbolic links. The file system is created initially having the following file
   * structure:
   *
   * <pre>
   *   /
   *      work/
   *         dir/
   *            a
   *            b/

      assertFalse(MoreFiles.isRegularFile(NOFOLLOW_LINKS).apply(symlinkToFile));
    }
  }

  /**
   * Creates a new file system for testing that supports the given features in addition to
   * supporting symbolic links. The file system is created initially having the following file
   * structure:
   *
   * <pre>
   *   /
   *      work/
   *         dir/
   *            a
   *            b/

		// regular file.
		h: &Header{
			Name:     "test.txt",
			Mode:     0644,
			Size:     12,
			ModTime:  time.Unix(1360600916, 0),
			Typeflag: TypeReg,
		},
		fm: 0644,
	}, {
		// symbolic link.
		h: &Header{
			Name:     "link.txt",
			Mode:     0777,
			Size:     0,
			ModTime:  time.Unix(1360600852, 0),
			Typeflag: TypeSymlink,
		},
		fm: 0777 | fs.ModeSymlink,
	}, {

high bit is set is rejected.
</p>

<h3 id="symbols">Symbols</h3>

<p>
Some symbols, such as <code>R1</code> or <code>LR</code>,
are predefined and refer to registers.
The exact set depends on the architecture.
</p>

<p>
There are four predeclared symbols that refer to pseudo-registers.
These are not real registers, but rather virtual registers maintained by

      invalid response upon check_success(input) failure.
    suppress_default_error: (Bool) Suppress the above error message in favor of
      one from the check_success function.
    resolve_symlinks: (Bool) Translate symbolic links into the real filepath.
    n_ask_attempts: (Integer) Number of times to query for valid input before
      raising an error and quitting.

  Returns:
    [String] The value of var_name after querying for input.