public override Argument VisitRelationalExpression(CalcParser.RelationalExpressionContext context)
{
Argument arg1 = Visit(context.expression(0));
Argument arg2 = Visit(context.expression(1));
if (arg1.IsNull || arg2.IsNull)
{
return(Argument.Null);
}
if (context.GreaterThan() != null)
{
return(arg1.ToDouble() > arg2.ToDouble() ? new Argument(1.0) : new Argument(0.0));
}
if (context.GreaterThanEquals() != null)
{
return(arg1.ToDouble() >= arg2.ToDouble() ? new Argument(1.0) : new Argument(0.0));
}
if (context.LessThan() != null)
{
return(arg1.ToDouble() < arg2.ToDouble() ? new Argument(1.0) : new Argument(0.0));
}
if (context.LessThanEquals() != null)
{
return(arg1.ToDouble() <= arg2.ToDouble() ? new Argument(1.0) : new Argument(0.0));
}
throw new ExpressionException("Unknown relational operation: " + context.GetText());
}
public override Query VisitRelationalExpression(CalcParser.RelationalExpressionContext context)
{
Query q1 = Visit(context.expression(0));
Query q2 = Visit(context.expression(1));
if (context.GreaterThan() != null)
{
return(new Query($"({q1}>{q2})", ResultType.Number));
}
if (context.GreaterThanEquals() != null)
{
return(new Query($"({q1}>={q2})", ResultType.Number));
}
if (context.LessThan() != null)
{
return(new Query($"({q1}<{q2})", ResultType.Number));
}
if (context.LessThanEquals() != null)
{
return(new Query($"({q1}<={q2})", ResultType.Number));
}
throw new ExpressionException("Unknown relational expression: " + context.GetText());
}
