Parser(typename Encode<E>::PointerType input, Automata& nfa)
: reader(input)
{
nfa.clear();
if (reader.peek() == 0)
{
return;
}
auto ast = parseRE();
if (reader.peek() != 0)
{
throw ParseError();
}
State s;
State e;
ast->convertToNFA(nfa, s, e);
nfa.setStart(s);
nfa.setTerminate(e);
}
