fn ordinal(self) -> usize {
        use QrCodeEcc::*;
        match self {
            Low => 0,
            Medium => 1,
            Quartile => 2,
            High => 3,
        }
    }
// Returns an unsigned 2-bit integer (in the range 0 to 3).
Returns an unsigned 2-bit integer (in the range 0 to 3).
Returns an unsigned 2 - bit integer ( in the range 0 to 3 ) .
fn ordinal(self) -> usize {
        use QrCodeEcc::*;
        match self {
            Low => 0,
            Medium => 1,
            Quartile => 2,
            High => 3,
        }
    }
fn ordinal ( self ) -> usize { use QrCodeEcc :: * ; match self { Low => 0 , Medium => 1 , Quartile => 2 , High => 3 , } }
Returns an unsigned 2-bit integer (in the range 0 to 3).
Returns an unsigned 2 - bit integer ( in the range 0 to 3 ) .
self