Function rustc_ap_rustc_lexer::unescape::unescape_raw_str

pub fn unescape_raw_str<F>(literal_text: &str, callback: &mut F) where
    F: FnMut(Range<usize>, Result<char, EscapeError>), 

Takes a contents of a raw string literal (without quotes) and produces a sequence of characters or errors. Values are returned through invoking of the provided callback. NOTE: Raw strings do not perform any explicit character escaping, here we only translate CRLF to LF and produce errors on bare CR.