public void Visit(PlusRepetition target)
{
target.child.Accept(this);
var f = stack.Pop();
stack.Push(NFA.OneOrMany(f));
}
private AstNode Element()
{
var atomNode = Atom();
while (More() && PeekIsAny('*', '+', '?'))
{
var character = Peek();
switch (character)
{
case '*':
atomNode = new KleenStarRepetition(atomNode);
Consume('*');
break;
case '+':
atomNode = new PlusRepetition(atomNode);
Consume('+');
break;
case '?':
atomNode = new QuestionRepetition(atomNode);
Consume('?');
break;
default:
break;
}
}
return(atomNode);
}