public override Argument VisitMultiplicativeExpression(CalcParser.MultiplicativeExpressionContext context)
{
Argument arg1 = Visit(context.expression(0));
Argument arg2 = Visit(context.expression(1));
if (arg1.IsNull || arg2.IsNull)
{
return(Argument.Null);
}
if (context.Multiply() != null)
{
return(Multiplication(arg1, arg2));
}
if (context.Divide() != null)
{
return(Division(arg1, arg2));
}
return(Argument.Null);
}
public override Query VisitMultiplicativeExpression(CalcParser.MultiplicativeExpressionContext context)
{
Query q1 = Visit(context.expression(0));
Query q2 = Visit(context.expression(1));
ResultType type = ResultType.Undefined;
if (q1.ExpectedResult == ResultType.Number && q2.ExpectedResult == ResultType.Number)
{
type = ResultType.Number;
}
if (context.Multiply() != null)
{
return(new Query($"({q1}*{q2})", type));
}
if (context.Divide() != null)
{
return(new Query($"({q1}/nullif({q2}, 0))", type));
}
throw new ExpressionException("Unknown multiplicative operation: " + context.GetText());
}
