public void TestSeek()
{
// ^(101 ^(102 103 ^(106 107) ) 104 105)
// stream has 7 real + 6 nav nodes
// Sequence of types: 101 DN 102 DN 103 106 DN 107 UP UP 104 105 UP EOF
ITree r0 = new CommonTree(new CommonToken(101));
ITree r1 = new CommonTree(new CommonToken(102));
r0.AddChild(r1);
r1.AddChild(new CommonTree(new CommonToken(103)));
ITree r2 = new CommonTree(new CommonToken(106));
r2.AddChild(new CommonTree(new CommonToken(107)));
r1.AddChild(r2);
r0.AddChild(new CommonTree(new CommonToken(104)));
r0.AddChild(new CommonTree(new CommonToken(105)));
ITreeNodeStream stream = newStream(r0);
stream.Consume(); // consume 101
stream.Consume(); // consume DN
stream.Consume(); // consume 102
stream.Seek(7); // seek to 107
Assert.AreEqual(107, ((ITree)stream.LT(1)).Type);
stream.Consume(); // consume 107
stream.Consume(); // consume UP
stream.Consume(); // consume UP
Assert.AreEqual(104, ((ITree)stream.LT(1)).Type);
}
public override void Reset()
{
base.Reset(); // reset all recognizer state variables
if (input != null)
{
input.Seek(0); // rewind the input
}
}