Function write_key 

pub fn write_key<W: Write>(
    writer: &mut W,
    key: &Key,
) -> Result<(), KeyBinaryError>

Writes a KEY index to a writer.

Errors

KeyBinaryError::InvalidData when a BIF filename holds a NUL, which the null-terminated filename table cannot represent.

KeyBinaryError::ValueOverflow when either count, a table offset or size, or a filename’s on-disk length will not fit its field, naming which. The filename length is a u16, so it is the narrowest of these.

KeyBinaryError::TextEncoding when a filename has no form in the KEY’s encoding, and KeyBinaryError::Io when the writer fails, which can leave a partial file.