cpp/experimental/fs/is empty

Checks whether the given path refers to an empty file or directory.

The second version returns and sets  to an appropriate error code if an error occurs. Otherwise, is cleared with a call to.

Return value
if refers to an empty file or directory,  otherwise.

Exceptions
@1@ if an error occurs. The exception object is constructed with as an argument. The error code is set to an appropriate error code for the error that caused the failure.

@2@