add method
Implementation
LexoInteger add(LexoInteger other) {
checkSystem(other);
if (isZero()) {
return other;
}
if (other.isZero()) {
return this;
}
if (!identical(sign, other.sign)) {
var pos;
if (identical(sign, -1)) {
pos = negate();
final val = pos.subtract(other);
return val.negate();
}
pos = other.negate();
return subtract(pos);
}
final result = LexoInteger.Add(sys, mag, other.mag);
return LexoInteger.make(sys, sign, result);
}