public abstract void Visit(ValueExpression expression);
public string CalExpressionTreeResult(NCalc2.Expressions.LogicalExpression lgInput, int intSpaceInput)
{
if (lgInput == null)
{
return("\r\n");
}
//
string strRet = "";
string strTemp = "";
int i, j = 0;
//Each time we call this function in another level, add more indication space
int intSpace = intSpaceInput + 1;
//
if ((lgInput == null) || (lgInput.objResult == null)) //This one is Recursion stop condition
{
strRet = strRet + "null" + "\r\n";
}
else if (lgInput is NCalc2.Expressions.ValueExpression) //This one is Recursion stop condition
{
NCalc2.Expressions.ValueExpression ValueEx = (NCalc2.Expressions.ValueExpression)lgInput;
strRet = strRet + lgInput.ToString() + ":" + ValueEx.Value.ToString() + "\r\n";
}
else if (lgInput is NCalc2.Expressions.IdentifierExpression) //This one is Recursion stop condition
{
strRet = strRet + lgInput.ToString() + ": " + lgInput.objResult.ToString() + "\r\n";
}
else if (lgInput is NCalc2.Expressions.FunctionExpression) //This case may do recursion
{
strRet = strRet + lgInput.ToString() + ": " + lgInput.objResult.ToString() + "\r\n";
//
NCalc2.Expressions.FunctionExpression FuncExpress = (NCalc2.Expressions.FunctionExpression)lgInput;
for (j = 0; j < intSpace; j++)
{
strTemp = strTemp + "___";
}
for (i = 0; i < FuncExpress.Expressions.Length; i++)
{
strRet = strRet + strTemp + this.CalExpressionTreeResult(FuncExpress.Expressions[i], intSpace);// + "\r\n";
}
}
else if (lgInput is NCalc2.Expressions.BinaryExpression) //This case may do recursion
{
NCalc2.Expressions.BinaryExpression BinaryEx = (NCalc2.Expressions.BinaryExpression)lgInput;
strRet = strRet + lgInput.ToString() + ": " + lgInput.objResult.ToString() + "\r\n";
for (j = 0; j < intSpace; j++)
{
strTemp = strTemp + "___";
}
strRet = strRet + strTemp + this.CalExpressionTreeResult(BinaryEx.LeftExpression, intSpace); // + "\r\n";
strRet = strRet + strTemp + this.CalExpressionTreeResult(BinaryEx.RightExpression, intSpace); // + "\r\n";
}
else if (lgInput is NCalc2.Expressions.TernaryExpression) //This case may do recursion
{
NCalc2.Expressions.TernaryExpression TernaryEx = (NCalc2.Expressions.TernaryExpression)lgInput;
strRet = strRet + lgInput.ToString() + ": " + lgInput.objResult.ToString() + "\r\n";
for (j = 0; j < intSpace; j++)
{
strTemp = strTemp + "___";
}
strRet = strRet + strTemp + this.CalExpressionTreeResult(TernaryEx.LeftExpression, intSpace); // + "\r\n";
strRet = strRet + strTemp + this.CalExpressionTreeResult(TernaryEx.MiddleExpression, intSpace); // + "\r\n";
strRet = strRet + strTemp + this.CalExpressionTreeResult(TernaryEx.RightExpression, intSpace); // + "\r\n";
}
else if (lgInput is NCalc2.Expressions.UnaryExpression) //This case may do recursion
{
NCalc2.Expressions.UnaryExpression UnaryEx = (NCalc2.Expressions.UnaryExpression)lgInput;
strRet = strRet + lgInput.ToString() + ": " + lgInput.objResult.ToString() + "\r\n";
for (j = 0; j < intSpace; j++)
{
strTemp = strTemp + "___";
}
strRet = strRet + strTemp + this.CalExpressionTreeResult(UnaryEx.Expression, intSpace);// + "\r\n";
}
else //This one is Recursion stop condition
{
//strRet = strRet + lgInput.ToString() + ": " + lgInput.objResult.ToString() + "\r\n";
}
//
return(strRet);
}
public override void Visit(ValueExpression expression)
{
switch (expression.Type)
{
case ValueType.Boolean:
Result.Append(expression.Value).Append(" ");
break;
case ValueType.DateTime:
Result.Append("#").Append(expression.Value).Append("#").Append(" ");
break;
case ValueType.Float:
Result.Append(decimal.Parse(expression.Value.ToString()).ToString(numberFormatInfo)).Append(" ");
break;
case ValueType.Integer:
Result.Append(expression.Value).Append(" ");
break;
case ValueType.String:
Result.Append("'").Append(expression.Value).Append("'").Append(" ");
break;
}
}
