public static PhraseStorage SplitFormula(this string formula)
{
PhraseStorage ps = new PhraseStorage();
PhraseAnalyzer pa = new PhraseAnalyzer(formula + "#=", ref ps);
if (pa.Succeed == false)
{
throw new Exception(string.Format("公式“{0}”错误", formula));;
}
SemanticAnalyzer sa = new SemanticAnalyzer(ref ps);
if (sa.Check() == false)
{
throw new Exception(string.Format("公式“{0}”有误，{1}", formula, sa.ErrorTip));;
}
return(ps);
}
/// <summary>
/// 保存词
/// </summary>
/// <param name="startpos">开始位置</param>
/// <param name="endpos">结束位置</param>
private void SavePhrase(int startpos, int endpos)
{
string temp = null;
//处理'@'
if (startpos == endpos && _chArray[startpos] == '@')
{
_ps.AddPhraseResult("-", PhraseTypeEnum.less);
return;
}
//处理其他词元
if (endpos >= 0 && startpos >= 0 && endpos >= startpos)
{
//trim()，以防止在startpos到endpos头尾出现空格
temp = _sentence.Substring(startpos, endpos - startpos + 1).Trim().ToLower();
_ps.AddPhraseResult(temp, PhraseAnalyzer.StrToType(temp));
}
}