Thread: Discarded Qualifiers

Code:

BigNum BigNum::operator+(const BigNum& rhs)
{     if(sign)
      {     if(rhs.GetSign())
            {     if(this->abs()>rhs.abs())
                       return Add(this->value, rhs.GetValue(), true);
                  else
                       return Add(rhs.GetValue(), this->value, true);
            }
            else
            {    if(this->abs()>rhs.abs())
                      return Subtract(this->GetValue(), rhs.GetValue(), true);
                 else
                      return Subtract(rhs.GetValue(), this->GetValue(), false);
            }
      }else{
            if(rhs.GetSign())
            {     if(this->abs()>=rhs.abs())
                       return Subtract(this->GetValue(), rhs.GetValue(), false);
                  else
                       return Subtract(rhs.GetValue(), this->GetValue(), true);
            }else{
                  if(this->abs()>rhs.abs())
                       return Add(this->value, rhs.GetValue(), false);
                  else
                       return Add(rhs.GetValue(), this->value, false);
            }
      }
}



inline BigNum BigNum::abs()
{     return BigNum(value);
}

Value is a string that contains the value of the bignum, excluding the sign of it which is held by the bool sign. The third parameter of the add and subtract functions is the sign of the result. Also, I have a non-explicit templated constructor that parses through the parameter so that

Here's the error:

356 passing `const BigNum' as `this' argument of `class BigNum BigNum::abs()' discards qualifiers

It is found at every if statement with the abs calls.

You're calling a non-const method on a constant reference. Try making the abs() method const:

Code:

inline BigNum BigNum::abs() const
{     return BigNum(value);
}

Yep, that was it. Another stupid mistake. Thanks.