Function json_escaped_char

crates/stdlib/src/json/machinery.rs:60–73

(c: u8)

#[inline(always)]
fn json_escaped_char(c: u8) -> Option<&'static str> {
    let bitset_value = NEEDS_ESCAPING_BITSET[(c / 64) as usize] & (1 << (c % 64));
    if bitset_value == 0 {
        None
    } else {
        Some(match c {
            x if x < 0x20 => ESCAPE_CHARS[c as usize],
            b'\\' => "\\\\",
            b'\"' => "\\\"",
            0x7F => "\\u007f",
            _ => unreachable!(),
        })
    }
}

pub fn write_json_string<W: io::Write>(s: &str, ascii_only: bool, w: &mut W) -> io::Result<()> {
    w.write_all(b"\"")?;