pub struct FileInputState {
current_path: std::option::Option,
line_num: uint,
line_num_file: uint,
}A summary of the internal state of a FileInput object. line_num
and line_num_file represent the number of lines read in total and in
the current file respectively. current_path is None if the current
file is stdin.
impl std::clone::Clone for FileInputStatefn clone(&self) -> FileInputState
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