public IBxUnitConvert Parse(IBxUnitConvert left, IFEBinary mid, ref int pos)
{
IBxUnitConvert param = ParseOneParam(ref pos);
if (param == null)
{
if (mid != null)
{
throw new Exception("操作符后未发现公式元素！");
}
else
{
return(left);
}
}
else
{
IFEBinary curOperator = ParseOneBinary(ref pos);
if (curOperator == null) /*|| (curOperator.ElementType == EFormulaElementType.rightBrace)*/
{
if (mid == null)
{
return(param);
}
else
{
return(new BUParsedItem(left, mid, param));
}
}
else
{
if (mid == null)
{
return(Parse(param, curOperator, ref pos));
}
else
{
if (mid.Grade >= curOperator.Grade)
{
return(Parse(new BUParsedItem(left, mid, param), curOperator, ref pos));
}
else
{
IBxUnitConvert right = Parse(param, curOperator, ref pos);
if (right == null)
{
throw new Exception(string.Format("符号{0}之后的部分错误！", mid.ToString()));
}
return(new BUParsedItem(left, mid, right));
}
}
}
}
}
static BUOperators()
{
s_binarys = new IFEBinary[4];
s_binarys[0] = s_binaryAdd;
s_binarys[1] = s_binarySubtract;
s_binarys[2] = s_binaryMultiply;
s_binarys[3] = s_binaryDivide;
s_braces = new IFormulaElement[2];
s_braces[0] = s_leftBrace;
s_braces[1] = s_rightBrace;
}
public BUParsedItem(IBxUnitConvert leftParam, IFEBinary midOperater, IBxUnitConvert rightParam)
{
left = leftParam;
mid = midOperater;
right = rightParam;
}
static IBxUnitConvert Contact(IBxUnitConvert left, IFEBinary mid, IBxUnitConvert right)
{
return(new BUParsedItem(left, mid, right));
}
