|
public static New ( |
||
| tks | ||
| str | string | |
| return | ||
internal bool AddNfaNode(NfaNode nfa)
{
if (!m_nfa.Add(nfa))
{
return(false);
}
if (nfa.m_sTerminal != "")
{
int qi, n = 0;
string tokClass = "";
string p = nfa.m_sTerminal;
if (p[0] == '%')
{ // check for %Tokname special action
for (n = 0, qi = 1; qi < p.Length; qi++, n++) // extract the class name
{
if (p[qi] == ' ' || p[qi] == '\t' || p[qi] == '\n' || p[qi] == '{' || p[qi] == ':')
{
break;
}
}
tokClass = nfa.m_sTerminal.Substring(1, n);
}
// check for ResWds machinery // 4.7
if (n > 0 && n + 1 < p.Length)
{
string st = nfa.m_sTerminal.Substring(n + 1).Trim();
if (st.Length > 0)
{
if (st.StartsWith("%except"))
{
m_reswds = nfa.m_state;
m_tks.m_tokens.reswds[nfa.m_state] = ResWds.New(m_tks, st.Substring(7));
}
}
}
// special action is always last in the list
if (tokClass == "")
{ //nfa has an old action
if (m_tokClass == "" // if both are old-style
|| // or we have a special action that is later
(m_actions.a_act) > nfa.m_state) // m_actions has at least one entry
{
AddAction(nfa.m_state);
}
// else we have a higher-precedence special action so we do nothing
}
else if (m_actions == null || m_actions.a_act > nfa.m_state)
{
MakeLastAction(nfa.m_state);
m_tokClass = tokClass;
} // else we have a higher-precedence special action so we do nothing
}
return(true);
}
internal bool AddNfaNode(NfaNode nfa)
{
if (!this.m_nfa.Add(nfa))
{
return(false);
}
if (nfa.m_sTerminal != "")
{
int length = 0;
string str1 = "";
string sTerminal = nfa.m_sTerminal;
if (sTerminal[0] == '%')
{
length = 0;
int index = 1;
while (index < sTerminal.Length && (sTerminal[index] != ' ' && sTerminal[index] != '\t') && (sTerminal[index] != '\n' && sTerminal[index] != '{' && sTerminal[index] != ':'))
{
++index;
++length;
}
str1 = nfa.m_sTerminal.Substring(1, length);
}
if (length > 0 && length + 1 < sTerminal.Length)
{
string str2 = nfa.m_sTerminal.Substring(length + 1).Trim();
if (str2.Length > 0 && str2.StartsWith("%except"))
{
this.m_reswds = nfa.m_state;
this.m_tks.m_tokens.reswds[(object)nfa.m_state] = (object)ResWds.New(this.m_tks, str2.Substring(7));
}
}
if (str1 == "")
{
if (this.m_tokClass == "" || this.m_actions.a_act > nfa.m_state)
{
this.AddAction(nfa.m_state);
}
}
else if (this.m_actions == null || this.m_actions.a_act > nfa.m_state)
{
this.MakeLastAction(nfa.m_state);
this.m_tokClass = str1;
}
}
return(true);
}