public string GetShownString(Token tk)
{
if (tk == null)
{
return "";
}
switch (tk.Type)
{
case TokenType.Condition:
return "条件";
case TokenType.DT:
return "小数处理";
case TokenType.Fixed:
return "内(" + GetFixItemName(tk.Value.ToString()) + ")";
case TokenType.Id:
return GetPRItemName(tk.Value.ToString());
case TokenType.NE:
return "≠";
case TokenType.Sum:
return "求和";
case TokenType.SumFlag:
return GetSumFlagName(tk.Value.ToString());
default:
return tk.ToString();
}
}
public ConSyntaxTreeNode(Token t)
: base(t)
{
}
public SumSyntaxTreeNode(Token t, ICalcFunction icalc)
: base(t)
{
this.icalc = icalc;
}
public SumFlagSyntaxTreeNode(Token t)
: base(t)
{
}
public OpSyntaxTreeNode(Token t)
: base(t)
{
}
public NumSynTaxTreeNode(Token t)
: base(t)
{
}
public SyntaxTreeNode(Token t)
{
tk = t;
children = new List<SyntaxTreeNode>();
}
/// <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);
}
}
private void MatchToken(TokenType expected)
{
if (CurToken.Type == expected)
{
curTok = scanner.GetToken();
}
else
{
throw new ParseException("unexpected token:", CurToken);
}
}
public ParseException(string message)
: base(message)
{
occuToken = null;
}
public ParseException(string message, Token tk)
: base(message)
{
occuToken = tk;
}
public ParseException(string message, Token tk, Exception inner)
: base(message, inner)
{
occuToken = tk;
}
public ParseException(string message, Exception inner)
: base(message, inner)
{
occuToken = null;
}
public Token(Token t)
{
tktppe = t.tktppe;
value = t.value;
}
public TokenEx(Token t, string shown)
: base(t)
{
this.shown = shown;
}
