Function run 

pub fn run<R, W, E>(
    mode: Mode,
    reader: R,
    writer: W,
    error_writer: E,
) -> Result<(), Error>
where
    R: BufRead,
    W: Write,
    E: Write,

Reads clippy JSON from reader, formats according to mode, writes to writer.

Per-line JSON parse errors are logged to error_writer and the run continues; only I/O failures on reader or writer are fatal.

Errors

Returns Error::Io if reading from reader, writing to writer, or writing to error_writer fails.