/// <summary>
/// 添加一个到特定状态的转移。
/// </summary>
/// <param name="state">要转移到的状态。</param>
/// <param name="charClass">转移的字符类。</param>
public void Add(NfaState state, string charClass)
{
if (!RegexCharClass.IsEmpty(charClass))
{
charClassTransition = Nfa.GetCharClass(charClass);
CharClassTarget = state;
}
}
/// <summary>
/// Simple optimization. If a set is a singleton, an inverse singleton,
/// or empty, it's transformed accordingly.
/// </summary>
internal RegexNode ReduceSet()
{
// Extract empty-set, one and not-one case as special
if (RegexCharClass.IsEmpty(_str))
{
_type = Nothing;
_str = null;
}
else if (RegexCharClass.IsSingleton(_str))
{
_ch = RegexCharClass.SingletonChar(_str);
_str = null;
_type += (One - Set);
}
else if (RegexCharClass.IsSingletonInverse(_str))
{
_ch = RegexCharClass.SingletonChar(_str);
_str = null;
_type += (Notone - Set);
}
return(this);
}
/// <summary>
/// Simple optimization. If a set is a singleton, an inverse singleton,
/// or empty, it's transformed accordingly.
/// </summary>
private RegexNode ReduceSet()
{
// Extract empty-set, one and not-one case as special
if (RegexCharClass.IsEmpty(Str))
{
NType = Nothing;
Str = null;
}
else if (RegexCharClass.IsSingleton(Str))
{
Ch = RegexCharClass.SingletonChar(Str);
Str = null;
NType += (One - Set);
}
else if (RegexCharClass.IsSingletonInverse(Str))
{
Ch = RegexCharClass.SingletonChar(Str);
Str = null;
NType += (Notone - Set);
}
return(this);
}
