/// <summary>
/// Parse the element text and make the element point to delegate which evaluate the text if necessary.
/// </summary>
/// <param name="element"></param>
/// <returns></returns>
public static QsSequenceElement Parse(string element, QsEvaluator qse, QsSequence sequence)
{
if (string.IsNullOrEmpty(element))
{
throw new QsException("Can't create element from empty string.");
}
//try direct quantity
AnyQuantity <double> v;
if (Unit.TryParseQuantity(element, out v))
{
var el = QsSequenceElement.FromQuantity(new QsScalar {
NumericalQuantity = v
});
el.ElementDeclaration = element;
el.IndexEvaluation = false;
el.ParameterEvaluation = false;
return(el);
}
else
{
QsSequenceElement se = new QsSequenceElement();
//try one index delegate without parameters
//Create the lambda function that will pass the index and parameters to the expression.
SimpleLambdaBuilder lb = SimpleLambdaBuilder.Create(typeof(QsValue), "ElementValue");
//add the index parameter
lb.Parameter(typeof(int), sequence.SequenceIndexName);
//find the index parameter in line to know if it will be evaluated or not
if (element.IndexOf(sequence.SequenceIndexName) > -1)
{
se.IndexEvaluation = true;
}
//make the sequence parameters.
foreach (var seqParam in sequence.Parameters)
{
lb.Parameter(typeof(QsValue), seqParam.Name);
if (element.IndexOf(seqParam.Name) > -1)
{
se.ParameterEvaluation = true;
}
}
QsVar pvar = new QsVar(qse, element, sequence, lb);
lb.Body = pvar.ResultExpression;
LambdaExpression le = lb.MakeLambda();
se.ElementDeclaration = element;
se.ElementExpression = pvar.ResultExpression;
se.ElementValue = le.Compile();
return(se);
}
throw new QsException("Check me in sequence element :( :( :( ");
}
