/// <summary>
/// 反向分词函数，读取字母，数字序列
/// </summary>
/// <param name="ls">反向分词结果的词链表</param>
/// <param name="temp">要进行反向分词的字符串序列</param>
/// <param name="i">当前扫描位置</param>
private void reflexNumberAlpha(List <_WordInnfo> ls, ref string temp, ref int i)
{
var temps = temp[i].ToString();
var w = new _WordInnfo();
for (int j = i + 1; j < temp.Length; j++, i++)
{
if (Regex_Helper.Is_Number(temp[j].ToString()) || Regex_Helper.Is_Alpha(temp[j].ToString()))
{
temps += temp[j];
}
else
{
i++;
break;
}
}
w.Name = temps;
Lexicer.SetAlphaNumberType(w);
ls.Add(w);
if (i != temp.Length - 1)
{
i--;
}
}
/// <summary>
/// 将mathexpression 切分为 字母 数字 和符号的 序列
/// </summary>
/// <param name="str"></param>
/// <returns></returns>
public static List <string> FlexMathExpression(string str)
{
var ls = new List <string>();
var flag = -1;
var temp = string.Empty;
foreach (var item in str)
{
if (Regex_Helper.Is_Alpha(item.ToString()))
{
if (flag == -1)
{
if (temp == string.Empty)
{
temp += item;
flag = 0;
}
}
else if (flag == 1)
{
temp += item;
}
else
{
ls.Add(temp);
temp = item.ToString();
flag = 1;
}
}
else if (Regex_Helper.Is_Number(item.ToString()))
{
if (flag == -1)
{
flag = 0;
temp += item;
}
else if (flag == 0)
{
temp += item;
}
else
{
ls.Add(temp);
temp += item;
flag = 0;
}
}
else
{
ls.Add(temp);
ls.Add(item.ToString());
flag = -1;
temp = string.Empty;
}
}
ls.Add(temp);
return(ls);
}