public override Query VisitEqualityExpression(CalcParser.EqualityExpressionContext context)
{
Query q1 = Visit(context.expression(0));
Query q2 = Visit(context.expression(1));
if (context.Equals_() != null)
{
return(new Query($"({q1}={q2})", ResultType.Number));
}
if (context.NotEquals() != null)
{
return(new Query($"({q1}<>{q2})", ResultType.Number));
}
throw new ExpressionException("Unknown equality expression: " + context.GetText());
}
public override Argument VisitEqualityExpression(CalcParser.EqualityExpressionContext context)
{
Argument arg1 = Visit(context.expression(0));
Argument arg2 = Visit(context.expression(1));
if (arg1.IsNull || arg2.IsNull)
{
return(Argument.Null);
}
if (context.Equals_() != null)
{
return(Equals(arg1, arg2) ? new Argument(1.0) : new Argument(0.0));
}
if (context.NotEquals() != null)
{
return(!Equals(arg1, arg2) ? new Argument(1.0) : new Argument(0.0));
}
throw new ExpressionException("Unknown equality operation: " + context.GetText());
}
