pub fn is_ctrl(c: char) -> bool {
    const CTRL_MAX: u32 = 0x1f;

    c != '\0' && c as u32 <= CTRL_MAX
}
/// Returns whether the given character is a control character.
Returns whether the given character is a control character.
Returns whether the given character is a control character .
pub fn is_ctrl(c: char) -> bool {
    const CTRL_MAX: u32 = 0x1f;
    c != '\0' && c as u32 <= CTRL_MAX
}
pub fn is_ctrl ( c : char ) -> bool { const CTRL_MAX : u32 = 0x1f ; c != '\0' && c as u32 <= CTRL_MAX }
Returns whether the given character is a control character.
Returns whether the given character is a control character .
c
char
c
char