private void RecogId()
{
string str = "";
uint Typecode;
do
{
str = str + Line_Str[i];
i++;
} while (IsAlpha(Line_Str[i]) || IsDight(Line_Str[i]));//判断是不是字母或数字，是的话继续执行
Typecode = keyword.FindKeyWord(str); //是否为关键字
Token token = new Token(); //存入token文件
token.content = str;
token.Line = line;
if (Typecode == 0)//不在关键字中
{
//标识符
token.type = 2;
token.symb = symbles.Count;
Symble sym = new Symble(); //存入符号表
sym.content = str;
sym.type = 2; //TAG
sym.token = token.symb;
symbles.Add(sym);
}
else
{
token.type = Typecode;//关键字
token.symb = -1;
}
tokens.Add(token);
}
private void RecogCons()
{
string str = Line_Str[i].ToString();
bool flag = true;
bool point = true;
while (flag)
{
i++;
if (IsDight(Line_Str[i]))
{
str += Line_Str[i];
}
else if (Line_Str[i] == '.')
{
if (point)
{
str += Line_Str[i];
point = false;//读取小数点，此后不再读取
}
else
{
Error e = new Error(line, "出现第二个'.'号");
errors.Add(e);
flag = false;
}
}
else if (IsAlpha(Line_Str[i]))
{
i++;
if (IsDight(Line_Str[i]))
{
i--;
i--;
if (point)
{
Error e = new Error(line, "数字开头的数字、字母串");
errors.Add(e);
}
else
{
Error e = new Error(line, "实数的小数部分出现字母");
errors.Add(e);
}
}
}
else
{
flag = false;
}
}//while end
if (point)
{
Token token = new Token();
token.content = str;
token.type = 3; //nufloat
token.symb = symbles.Count;
token.Line = line;
tokens.Add(token);
Symble sym = new Symble();
sym.content = str;
sym.type = 3;
sym.token = token.symb;
symbles.Add(sym);
}
else
{
Token token = new Token();
token.content = str;
token.Line = line;
token.type = 4;//float
token.symb = symbles.Count;
tokens.Add(token);
Symble sym = new Symble();
sym.content = str;
sym.type = 4;
sym.token = token.symb;
symbles.Add(sym);
}
}
