// 顶层公式使用
public XTFormula RootParse()
{
HashSet <string> argNames = new HashSet <string>();
XTFormula formula = new XTFormula(this.m_formula, argNames);
return(this.Parse(argNames, formula));
}
// 解释嵌套表达式
private XTFormula Parse(HashSet <string> argNames, XTFormula formula)
{
XTFormulaToken token = null;
while (this.CurrChar() > 0)
{
token = null;
foreach (XTFormulaTokenParser parser in m_tokenParsers)
{
token = parser.Parse(this, argNames);
if (token == null)
{
continue;
}
formula.AddToken(this, token);
break;
}
if (token == null)
{
break;
}
}
if (!formula.IsVaild)
{
this.RaiseFormulaException();
}
return(formula);
}
public override XTFormulaToken Parse(XTFormulaParser parser, HashSet <string> argNames)
{
if (parser.CurrChar() != '(')
{
return(null);
}
parser.NextChar();
XTFormula formula = parser.InnerParse(argNames);
int end = parser.NextChar();
if (end != ')')
{
parser.RaiseFormulaException();
}
return(new XTScopeToken(formula));
}
private XTFormulaToken CreateToken(XTFormulaParser parser, HashSet <string> argNames, BaseFuncInfo funcInfo)
{
// 函数开始
if (parser.NextRegx(funcInfo.ReStart) == null)
{
return(null);
}
// 函数参数
XTFormula formula;
XTFormula[] formulas = new XTFormula[funcInfo.ArgCount];
for (int i = 0; i < funcInfo.ArgCount; ++i)
{
if (i > 0)
{
if (parser.NextRegx(sm_reSplit) == null)
{
parser.RaiseFormulaException();
}
}
formula = parser.InnerParse(argNames);
if (formula == null)
{
parser.RaiseFormulaException();
}
formulas[i] = formula;
}
// 函数结束
if (parser.NextRegx(sm_reEnd) == null)
{
parser.RaiseFormulaException();
}
return(funcInfo.CreateToken(formulas));
}
public XTScopeToken(XTFormula formula)
{
this.m_formula = formula;
}