private static void GetPart(FormulaExpression expression, string partToken)
{
var signEqMatch = ExpressionRegexp.OperatorRegex.Match(expression.StringExpression);
var signEqIndex = signEqMatch.Index;
var sPart = partToken == "Left"
? expression.StringExpression.Substring(0, signEqIndex).Trim()
: expression.StringExpression.Substring(signEqIndex + signEqMatch.Length).Trim();
if (sPart == "")
{
Logger.Error("Часть выражения записана неверно");
}
var part = new FormulaExpressionPart(expression, sPart);
if (partToken == "Left")
expression.TargetPart = part;
else
expression.SourcePart = part;
var captures = ExpressionRegexp.OperandRegex.Matches(sPart);
for (var i = 0; i < captures.Count; i++)
{
var a1Ref = captures[i].Value.Trim();
var varName = String.Format("v{0}", i);
part.Variables.Add(varName, a1Ref);
part.StringExpressionPart = part.StringExpressionPart.Replace(a1Ref, varName);
}
}
public FormulaExpressionPart(FormulaExpression expression, string stringExpressionPart)
{
this.Expression = expression;
this.Variables = new Dictionary<string, string>();
_calc = new CalculationEngine();
this.StringExpressionPart = stringExpressionPart;
}
public static FormulaExpression Parse(string exp)
{
var resultExp = new FormulaExpression();
resultExp.StringExpression = exp;
GetPart(resultExp, "Left");
GetPart(resultExp, "Right");
return resultExp;
}