Function write_mime_param 

pub fn write_mime_param(
    name: &str,
    value: &str,
    out: &mut impl Sink,
) -> Result<(), WriteError>

Writes ; name=value: as a token, as a quoted string, or, for non-ASCII or long values, as ; name*=UTF-8''..., split into name*0*, name*1* sections on folded lines when one line would pass 78 columns. The parameter starts a line of its own: use write_mime_param_at after other text on the line. The output parses back with parse_mime_params to the same value.

Errors

WriteError::NotToken for a name that is not a MIME token or holds *, ', or %; WriteError::Forbidden for a control character in value; WriteError::OutOfRange for a value needing more than 32 sections; WriteError::Full (nothing written when the sink reports its room).

Examples

use parse_net::{mail, SliceSink};

let mut buf = [0u8; 64];
let mut out = SliceSink::new(&mut buf);
mail::write_mime_param("filename", "caf\u{e9}.txt", &mut out)?;
assert_eq!(out.written(), b"; filename*=UTF-8''caf%C3%A9.txt");