public void testSeekFromStart()
{
// ^(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)));
CommonTreeNodeStream stream = new CommonTreeNodeStream(r0);
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 void testPushPop()
{
// ^(101 ^(102 103) ^(104 105) ^(106 107) 108 109)
// stream has 9 real + 8 nav nodes
// Sequence of types: 101 DN 102 DN 103 UP 104 DN 105 UP 106 DN 107 UP 108 109 UP
ITree r0 = new CommonTree(new CommonToken(101));
ITree r1 = new CommonTree(new CommonToken(102));
r1.AddChild(new CommonTree(new CommonToken(103)));
r0.AddChild(r1);
ITree r2 = new CommonTree(new CommonToken(104));
r2.AddChild(new CommonTree(new CommonToken(105)));
r0.AddChild(r2);
ITree r3 = new CommonTree(new CommonToken(106));
r3.AddChild(new CommonTree(new CommonToken(107)));
r0.AddChild(r3);
r0.AddChild(new CommonTree(new CommonToken(108)));
r0.AddChild(new CommonTree(new CommonToken(109)));
CommonTreeNodeStream stream = new CommonTreeNodeStream(r0);
String expecting = " 101 2 102 2 103 3 104 2 105 3 106 2 107 3 108 109 3";
String found = stream.ToString();
Assert.AreEqual(expecting, found);
// Assume we want to hit node 107 and then "call 102" then return
int indexOf102 = 2;
int indexOf107 = 12;
for (int k = 1; k <= indexOf107; k++)
{ // consume til 107 node
stream.Consume();
}
// CALL 102
Assert.AreEqual(107, ((ITree)stream.LT(1)).Type);
stream.Push(indexOf102);
Assert.AreEqual(102, ((ITree)stream.LT(1)).Type);
stream.Consume(); // consume 102
Assert.AreEqual(Token.DOWN, ((ITree)stream.LT(1)).Type);
stream.Consume(); // consume DN
Assert.AreEqual(103, ((ITree)stream.LT(1)).Type);
stream.Consume(); // consume 103
Assert.AreEqual(Token.UP, ((ITree)stream.LT(1)).Type);
// RETURN
stream.Pop();
Assert.AreEqual(107, ((ITree)stream.LT(1)).Type);
}
public void testPushPopFromEOF()
{
// ^(101 ^(102 103) ^(104 105) ^(106 107) 108 109)
// stream has 9 real + 8 nav nodes
// Sequence of types: 101 DN 102 DN 103 UP 104 DN 105 UP 106 DN 107 UP 108 109 UP
ITree r0 = new CommonTree(new CommonToken(101));
ITree r1 = new CommonTree(new CommonToken(102));
r1.AddChild(new CommonTree(new CommonToken(103)));
r0.AddChild(r1);
ITree r2 = new CommonTree(new CommonToken(104));
r2.AddChild(new CommonTree(new CommonToken(105)));
r0.AddChild(r2);
ITree r3 = new CommonTree(new CommonToken(106));
r3.AddChild(new CommonTree(new CommonToken(107)));
r0.AddChild(r3);
r0.AddChild(new CommonTree(new CommonToken(108)));
r0.AddChild(new CommonTree(new CommonToken(109)));
CommonTreeNodeStream stream = new CommonTreeNodeStream(r0);
while (stream.LA(1) != Token.EOF)
{
stream.Consume();
}
int indexOf102 = 2;
int indexOf104 = 6;
Assert.AreEqual(Token.EOF, ((ITree)stream.LT(1)).Type);
// CALL 102
stream.Push(indexOf102);
Assert.AreEqual(102, ((ITree)stream.LT(1)).Type);
stream.Consume(); // consume 102
Assert.AreEqual(Token.DOWN, ((ITree)stream.LT(1)).Type);
stream.Consume(); // consume DN
Assert.AreEqual(103, ((ITree)stream.LT(1)).Type);
stream.Consume(); // consume 103
Assert.AreEqual(Token.UP, ((ITree)stream.LT(1)).Type);
// RETURN (to empty stack)
stream.Pop();
Assert.AreEqual(Token.EOF, ((ITree)stream.LT(1)).Type);
// CALL 104
stream.Push(indexOf104);
Assert.AreEqual(104, ((ITree)stream.LT(1)).Type);
stream.Consume(); // consume 102
Assert.AreEqual(Token.DOWN, ((ITree)stream.LT(1)).Type);
stream.Consume(); // consume DN
Assert.AreEqual(105, ((ITree)stream.LT(1)).Type);
stream.Consume(); // consume 103
Assert.AreEqual(Token.UP, ((ITree)stream.LT(1)).Type);
// RETURN (to empty stack)
stream.Pop();
Assert.AreEqual(Token.EOF, ((ITree)stream.LT(1)).Type);
}
public void testMarkRewindEntire()
{
// ^(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)));
CommonTreeNodeStream stream = new CommonTreeNodeStream(r0);
int m = stream.Mark(); // MARK
for (int k = 1; k <= 13; k++)
{ // consume til end
stream.LT(1);
stream.Consume();
}
Assert.AreEqual(Token.EOF, ((ITree)stream.LT(1)).Type);
Assert.AreEqual(Token.UP, ((ITree)stream.LT(-1)).Type);
stream.Rewind(m); // REWIND
// consume til end again :)
for (int k = 1; k <= 13; k++)
{ // consume til end
stream.LT(1);
stream.Consume();
}
Assert.AreEqual(Token.EOF, ((ITree)stream.LT(1)).Type);
Assert.AreEqual(Token.UP, ((ITree)stream.LT(-1)).Type);
}
public virtual string ToTokenString()
{
ICharStream input = this.Token.InputStream;
GrammarASTAdaptor adaptor = new GrammarASTAdaptor(input);
CommonTreeNodeStream nodes =
new CommonTreeNodeStream(adaptor, this);
StringBuilder buf = new StringBuilder();
GrammarAST o = (GrammarAST)nodes.LT(1);
int type = adaptor.GetType(o);
while (type != TokenTypes.EndOfFile)
{
buf.Append(" ");
buf.Append(o.Text);
nodes.Consume();
o = (GrammarAST)nodes.LT(1);
type = adaptor.GetType(o);
}
return(buf.ToString());
}
public void testPushPopFromEOF()
{
// ^(101 ^(102 103) ^(104 105) ^(106 107) 108 109)
// stream has 9 real + 8 nav nodes
// Sequence of types: 101 DN 102 DN 103 UP 104 DN 105 UP 106 DN 107 UP 108 109 UP
ITree r0 = new CommonTree(new CommonToken(101));
ITree r1 = new CommonTree(new CommonToken(102));
r1.AddChild(new CommonTree(new CommonToken(103)));
r0.AddChild(r1);
ITree r2 = new CommonTree(new CommonToken(104));
r2.AddChild(new CommonTree(new CommonToken(105)));
r0.AddChild(r2);
ITree r3 = new CommonTree(new CommonToken(106));
r3.AddChild(new CommonTree(new CommonToken(107)));
r0.AddChild(r3);
r0.AddChild(new CommonTree(new CommonToken(108)));
r0.AddChild(new CommonTree(new CommonToken(109)));
CommonTreeNodeStream stream = new CommonTreeNodeStream(r0);
while (stream.LA(1) != Token.EOF)
{
stream.Consume();
}
int indexOf102 = 2;
int indexOf104 = 6;
Assert.AreEqual(Token.EOF, ((ITree)stream.LT(1)).Type);
// CALL 102
stream.Push(indexOf102);
Assert.AreEqual(102, ((ITree)stream.LT(1)).Type);
stream.Consume(); // consume 102
Assert.AreEqual(Token.DOWN, ((ITree)stream.LT(1)).Type);
stream.Consume(); // consume DN
Assert.AreEqual(103, ((ITree)stream.LT(1)).Type);
stream.Consume(); // consume 103
Assert.AreEqual(Token.UP, ((ITree)stream.LT(1)).Type);
// RETURN (to empty stack)
stream.Pop();
Assert.AreEqual(Token.EOF, ((ITree)stream.LT(1)).Type);
// CALL 104
stream.Push(indexOf104);
Assert.AreEqual(104, ((ITree)stream.LT(1)).Type);
stream.Consume(); // consume 102
Assert.AreEqual(Token.DOWN, ((ITree)stream.LT(1)).Type);
stream.Consume(); // consume DN
Assert.AreEqual(105, ((ITree)stream.LT(1)).Type);
stream.Consume(); // consume 103
Assert.AreEqual(Token.UP, ((ITree)stream.LT(1)).Type);
// RETURN (to empty stack)
stream.Pop();
Assert.AreEqual(Token.EOF, ((ITree)stream.LT(1)).Type);
}
public void testNestedPushPop()
{
// ^(101 ^(102 103) ^(104 105) ^(106 107) 108 109)
// stream has 9 real + 8 nav nodes
// Sequence of types: 101 DN 102 DN 103 UP 104 DN 105 UP 106 DN 107 UP 108 109 UP
ITree r0 = new CommonTree(new CommonToken(101));
ITree r1 = new CommonTree(new CommonToken(102));
r1.AddChild(new CommonTree(new CommonToken(103)));
r0.AddChild(r1);
ITree r2 = new CommonTree(new CommonToken(104));
r2.AddChild(new CommonTree(new CommonToken(105)));
r0.AddChild(r2);
ITree r3 = new CommonTree(new CommonToken(106));
r3.AddChild(new CommonTree(new CommonToken(107)));
r0.AddChild(r3);
r0.AddChild(new CommonTree(new CommonToken(108)));
r0.AddChild(new CommonTree(new CommonToken(109)));
CommonTreeNodeStream stream = new CommonTreeNodeStream(r0);
// Assume we want to hit node 107 and then "call 102", which
// calls 104, then return
int indexOf102 = 2;
int indexOf107 = 12;
for (int k = 1; k <= indexOf107; k++)
{ // consume til 107 node
stream.Consume();
}
Assert.AreEqual(107, ((ITree)stream.LT(1)).Type);
// CALL 102
stream.Push(indexOf102);
Assert.AreEqual(102, ((ITree)stream.LT(1)).Type);
stream.Consume(); // consume 102
Assert.AreEqual(Token.DOWN, ((ITree)stream.LT(1)).Type);
stream.Consume(); // consume DN
Assert.AreEqual(103, ((ITree)stream.LT(1)).Type);
stream.Consume(); // consume 103
// CALL 104
int indexOf104 = 6;
stream.Push(indexOf104);
Assert.AreEqual(104, ((ITree)stream.LT(1)).Type);
stream.Consume(); // consume 102
Assert.AreEqual(Token.DOWN, ((ITree)stream.LT(1)).Type);
stream.Consume(); // consume DN
Assert.AreEqual(105, ((ITree)stream.LT(1)).Type);
stream.Consume(); // consume 103
Assert.AreEqual(Token.UP, ((ITree)stream.LT(1)).Type);
// RETURN (to UP node in 102 subtree)
stream.Pop();
Assert.AreEqual(Token.UP, ((ITree)stream.LT(1)).Type);
// RETURN (to empty stack)
stream.Pop();
Assert.AreEqual(107, ((ITree)stream.LT(1)).Type);
}
public void testPushPop()
{
// ^(101 ^(102 103) ^(104 105) ^(106 107) 108 109)
// stream has 9 real + 8 nav nodes
// Sequence of types: 101 DN 102 DN 103 UP 104 DN 105 UP 106 DN 107 UP 108 109 UP
ITree r0 = new CommonTree(new CommonToken(101));
ITree r1 = new CommonTree(new CommonToken(102));
r1.AddChild(new CommonTree(new CommonToken(103)));
r0.AddChild(r1);
ITree r2 = new CommonTree(new CommonToken(104));
r2.AddChild(new CommonTree(new CommonToken(105)));
r0.AddChild(r2);
ITree r3 = new CommonTree(new CommonToken(106));
r3.AddChild(new CommonTree(new CommonToken(107)));
r0.AddChild(r3);
r0.AddChild(new CommonTree(new CommonToken(108)));
r0.AddChild(new CommonTree(new CommonToken(109)));
CommonTreeNodeStream stream = new CommonTreeNodeStream(r0);
String expecting = " 101 2 102 2 103 3 104 2 105 3 106 2 107 3 108 109 3";
String found = stream.ToString();
Assert.AreEqual(expecting, found);
// Assume we want to hit node 107 and then "call 102" then return
int indexOf102 = 2;
int indexOf107 = 12;
for (int k = 1; k <= indexOf107; k++)
{ // consume til 107 node
stream.Consume();
}
// CALL 102
Assert.AreEqual(107, ((ITree)stream.LT(1)).Type);
stream.Push(indexOf102);
Assert.AreEqual(102, ((ITree)stream.LT(1)).Type);
stream.Consume(); // consume 102
Assert.AreEqual(Token.DOWN, ((ITree)stream.LT(1)).Type);
stream.Consume(); // consume DN
Assert.AreEqual(103, ((ITree)stream.LT(1)).Type);
stream.Consume(); // consume 103
Assert.AreEqual(Token.UP, ((ITree)stream.LT(1)).Type);
// RETURN
stream.Pop();
Assert.AreEqual(107, ((ITree)stream.LT(1)).Type);
}
public void testSeekFromStart()
{
// ^(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)));
CommonTreeNodeStream stream = new CommonTreeNodeStream(r0);
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 void testMarkRewindNested()
{
// ^(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)));
CommonTreeNodeStream stream = new CommonTreeNodeStream(r0);
int m = stream.Mark(); // MARK at start
stream.Consume(); // consume 101
stream.Consume(); // consume DN
int m2 = stream.Mark(); // MARK on 102
stream.Consume(); // consume 102
stream.Consume(); // consume DN
stream.Consume(); // consume 103
stream.Consume(); // consume 106
stream.Rewind(m2); // REWIND to 102
Assert.AreEqual(102, ((ITree)stream.LT(1)).Type);
stream.Consume();
Assert.AreEqual(Token.DOWN, ((ITree)stream.LT(1)).Type);
stream.Consume();
// stop at 103 and rewind to start
stream.Rewind(m); // REWIND to 101
Assert.AreEqual(101, ((ITree)stream.LT(1)).Type);
stream.Consume();
Assert.AreEqual(Token.DOWN, ((ITree)stream.LT(1)).Type);
stream.Consume();
Assert.AreEqual(102, ((ITree)stream.LT(1)).Type);
stream.Consume();
Assert.AreEqual(Token.DOWN, ((ITree)stream.LT(1)).Type);
}
public void testMarkRewindInMiddle()
{
// ^(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)));
CommonTreeNodeStream stream = new CommonTreeNodeStream(r0);
for (int k = 1; k <= 7; k++)
{ // consume til middle
//System.out.println(((ITree)stream.LT(1)).Type);
stream.Consume();
}
Assert.AreEqual(107, ((ITree)stream.LT(1)).Type);
int m = stream.Mark(); // MARK
stream.Consume(); // consume 107
stream.Consume(); // consume UP
stream.Consume(); // consume UP
stream.Consume(); // consume 104
stream.Rewind(m); // REWIND
Assert.AreEqual(107, ((ITree)stream.LT(1)).Type);
stream.Consume();
Assert.AreEqual(Token.UP, ((ITree)stream.LT(1)).Type);
stream.Consume();
Assert.AreEqual(Token.UP, ((ITree)stream.LT(1)).Type);
stream.Consume();
Assert.AreEqual(104, ((ITree)stream.LT(1)).Type);
stream.Consume();
// now we're past rewind position
Assert.AreEqual(105, ((ITree)stream.LT(1)).Type);
stream.Consume();
Assert.AreEqual(Token.UP, ((ITree)stream.LT(1)).Type);
stream.Consume();
Assert.AreEqual(Token.EOF, ((ITree)stream.LT(1)).Type);
Assert.AreEqual(Token.UP, ((ITree)stream.LT(-1)).Type);
}
public void testMarkRewindEntire()
{
// ^(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)));
CommonTreeNodeStream stream = new CommonTreeNodeStream(r0);
int m = stream.Mark(); // MARK
for (int k = 1; k <= 13; k++)
{ // consume til end
stream.LT(1);
stream.Consume();
}
Assert.AreEqual(Token.EOF, ((ITree)stream.LT(1)).Type);
Assert.AreEqual(Token.UP, ((ITree)stream.LT(-1)).Type);
stream.Rewind(m); // REWIND
// consume til end again :)
for (int k = 1; k <= 13; k++)
{ // consume til end
stream.LT(1);
stream.Consume();
}
Assert.AreEqual(Token.EOF, ((ITree)stream.LT(1)).Type);
Assert.AreEqual(Token.UP, ((ITree)stream.LT(-1)).Type);
}
public void testNestedPushPop()
{
// ^(101 ^(102 103) ^(104 105) ^(106 107) 108 109)
// stream has 9 real + 8 nav nodes
// Sequence of types: 101 DN 102 DN 103 UP 104 DN 105 UP 106 DN 107 UP 108 109 UP
ITree r0 = new CommonTree(new CommonToken(101));
ITree r1 = new CommonTree(new CommonToken(102));
r1.AddChild(new CommonTree(new CommonToken(103)));
r0.AddChild(r1);
ITree r2 = new CommonTree(new CommonToken(104));
r2.AddChild(new CommonTree(new CommonToken(105)));
r0.AddChild(r2);
ITree r3 = new CommonTree(new CommonToken(106));
r3.AddChild(new CommonTree(new CommonToken(107)));
r0.AddChild(r3);
r0.AddChild(new CommonTree(new CommonToken(108)));
r0.AddChild(new CommonTree(new CommonToken(109)));
CommonTreeNodeStream stream = new CommonTreeNodeStream(r0);
// Assume we want to hit node 107 and then "call 102", which
// calls 104, then return
int indexOf102 = 2;
int indexOf107 = 12;
for (int k = 1; k <= indexOf107; k++)
{ // consume til 107 node
stream.Consume();
}
Assert.AreEqual(107, ((ITree)stream.LT(1)).Type);
// CALL 102
stream.Push(indexOf102);
Assert.AreEqual(102, ((ITree)stream.LT(1)).Type);
stream.Consume(); // consume 102
Assert.AreEqual(Token.DOWN, ((ITree)stream.LT(1)).Type);
stream.Consume(); // consume DN
Assert.AreEqual(103, ((ITree)stream.LT(1)).Type);
stream.Consume(); // consume 103
// CALL 104
int indexOf104 = 6;
stream.Push(indexOf104);
Assert.AreEqual(104, ((ITree)stream.LT(1)).Type);
stream.Consume(); // consume 102
Assert.AreEqual(Token.DOWN, ((ITree)stream.LT(1)).Type);
stream.Consume(); // consume DN
Assert.AreEqual(105, ((ITree)stream.LT(1)).Type);
stream.Consume(); // consume 103
Assert.AreEqual(Token.UP, ((ITree)stream.LT(1)).Type);
// RETURN (to UP node in 102 subtree)
stream.Pop();
Assert.AreEqual(Token.UP, ((ITree)stream.LT(1)).Type);
// RETURN (to empty stack)
stream.Pop();
Assert.AreEqual(107, ((ITree)stream.LT(1)).Type);
}
public void testMarkRewindNested()
{
// ^(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)));
CommonTreeNodeStream stream = new CommonTreeNodeStream(r0);
int m = stream.Mark(); // MARK at start
stream.Consume(); // consume 101
stream.Consume(); // consume DN
int m2 = stream.Mark(); // MARK on 102
stream.Consume(); // consume 102
stream.Consume(); // consume DN
stream.Consume(); // consume 103
stream.Consume(); // consume 106
stream.Rewind(m2); // REWIND to 102
Assert.AreEqual(102, ((ITree)stream.LT(1)).Type);
stream.Consume();
Assert.AreEqual(Token.DOWN, ((ITree)stream.LT(1)).Type);
stream.Consume();
// stop at 103 and rewind to start
stream.Rewind(m); // REWIND to 101
Assert.AreEqual(101, ((ITree)stream.LT(1)).Type);
stream.Consume();
Assert.AreEqual(Token.DOWN, ((ITree)stream.LT(1)).Type);
stream.Consume();
Assert.AreEqual(102, ((ITree)stream.LT(1)).Type);
stream.Consume();
Assert.AreEqual(Token.DOWN, ((ITree)stream.LT(1)).Type);
}
public void testMarkRewindInMiddle()
{
// ^(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)));
CommonTreeNodeStream stream = new CommonTreeNodeStream(r0);
for (int k = 1; k <= 7; k++)
{ // consume til middle
//System.out.println(((ITree)stream.LT(1)).Type);
stream.Consume();
}
Assert.AreEqual(107, ((ITree)stream.LT(1)).Type);
int m = stream.Mark(); // MARK
stream.Consume(); // consume 107
stream.Consume(); // consume UP
stream.Consume(); // consume UP
stream.Consume(); // consume 104
stream.Rewind(m); // REWIND
Assert.AreEqual(107, ((ITree)stream.LT(1)).Type);
stream.Consume();
Assert.AreEqual(Token.UP, ((ITree)stream.LT(1)).Type);
stream.Consume();
Assert.AreEqual(Token.UP, ((ITree)stream.LT(1)).Type);
stream.Consume();
Assert.AreEqual(104, ((ITree)stream.LT(1)).Type);
stream.Consume();
// now we're past rewind position
Assert.AreEqual(105, ((ITree)stream.LT(1)).Type);
stream.Consume();
Assert.AreEqual(Token.UP, ((ITree)stream.LT(1)).Type);
stream.Consume();
Assert.AreEqual(Token.EOF, ((ITree)stream.LT(1)).Type);
Assert.AreEqual(Token.UP, ((ITree)stream.LT(-1)).Type);
}
public virtual string ToTokenString()
{
ICharStream input = this.Token.InputStream;
GrammarASTAdaptor adaptor = new GrammarASTAdaptor(input);
CommonTreeNodeStream nodes =
new CommonTreeNodeStream(adaptor, this);
StringBuilder buf = new StringBuilder();
GrammarAST o = (GrammarAST)nodes.LT(1);
int type = adaptor.GetType(o);
while (type != TokenTypes.EndOfFile)
{
buf.Append(" ");
buf.Append(o.Text);
nodes.Consume();
o = (GrammarAST)nodes.LT(1);
type = adaptor.GetType(o);
}
return buf.ToString();
}
