public Parser(string exp, ICalcFunction calcFunc)
{
this.exp = exp;
tree = null;
scanner = new Scanner(exp);
this.icalcfunc = calcFunc;
}
public void AddChild(SyntaxTreeNode node)
{
children.Add(node);
}
/// <summary>
/// 分析表达式，生成token、列表和语法树。
/// </summary>
public void Parse()
{
tree = null;
curTok = scanner.GetToken();
if (null == CurToken)
{
return;
}
tree = Exp();
if (CurToken != null)
{
throw new ParseException("unexpected token:", CurToken);
}
}
public Parser(string exp)
{
this.exp = exp;
tree = null;
scanner = new Scanner(exp);
}