public virtual void ReplaceChildren(object parent, int startChildIndex, int stopChildIndex, object t)
{
if (parent != null)
{
TreeAdaptor.ReplaceChildren(parent, startChildIndex, stopChildIndex, t);
}
}
public override object NextElement()
{
_it.MoveNext();
object t = _it.Current;
//System.out.println("pulled "+adaptor.getType(t));
if (t == _it.up)
{
_level--;
if (_level == 0 && _hasNilRoot)
{
_it.MoveNext();
return(_it.Current); // don't give last UP; get EOF
}
}
else if (t == _it.down)
{
_level++;
}
if (_level == 0 && TreeAdaptor.IsNil(t))
{
// if nil root, scarf nil, DOWN
_hasNilRoot = true;
_it.MoveNext();
t = _it.Current; // t is now DOWN, so get first real node next
_level++;
_it.MoveNext();
t = _it.Current;
}
return(t);
}
public bool HasPositionInformation(object node)
{
IToken token = TreeAdaptor.GetToken(node);
if (token == null)
{
return(false);
}
if (token.Line <= 0)
{
return(false);
}
return(true);
}
/** <summary>For debugging; destructive: moves tree iterator to end.</summary> */
public virtual string ToTokenTypeString()
{
Reset();
StringBuilder buf = new StringBuilder();
object o = LT(1);
int type = TreeAdaptor.GetType(o);
while (type != TokenTypes.EndOfFile)
{
buf.Append(" ");
buf.Append(type);
Consume();
o = LT(1);
type = TreeAdaptor.GetType(o);
}
return(buf.ToString());
}
public IASTNode NegateNode(IASTNode node)
{
// TODO - copy code from HqlParser.java
switch (node.Type)
{
case OR:
node.Type = AND;
node.Text = "{and}";
NegateNode(node.GetChild(0));
NegateNode(node.GetChild(1));
return(node);
case AND:
node.Type = OR;
node.Text = "{or}";
NegateNode(node.GetChild(0));
NegateNode(node.GetChild(1));
return(node);
case EQ:
node.Type = NE;
node.Text = "{not}" + node.Text;
return(node); // (NOT (EQ a b) ) => (NE a b)
case NE:
node.Type = EQ;
node.Text = "{not}" + node.Text;
return(node); // (NOT (NE a b) ) => (EQ a b)
case GT:
node.Type = LE;
node.Text = "{not}" + node.Text;
return(node); // (NOT (GT a b) ) => (LE a b)
case LT:
node.Type = GE;
node.Text = "{not}" + node.Text;
return(node); // (NOT (LT a b) ) => (GE a b)
case GE:
node.Type = LT;
node.Text = "{not}" + node.Text;
return(node); // (NOT (GE a b) ) => (LT a b)
case LE:
node.Type = GT;
node.Text = "{not}" + node.Text;
return(node); // (NOT (LE a b) ) => (GT a b)
case LIKE:
node.Type = NOT_LIKE;
node.Text = "{not}" + node.Text;
return(node); // (NOT (LIKE a b) ) => (NOT_LIKE a b)
case NOT_LIKE:
node.Type = LIKE;
node.Text = "{not}" + node.Text;
return(node); // (NOT (NOT_LIKE a b) ) => (LIKE a b)
case IN:
node.Type = NOT_IN;
node.Text = "{not}" + node.Text;
return(node);
case NOT_IN:
node.Type = IN;
node.Text = "{not}" + node.Text;
return(node);
case IS_NULL:
node.Type = IS_NOT_NULL;
node.Text = "{not}" + node.Text;
return(node); // (NOT (IS_NULL a b) ) => (IS_NOT_NULL a b)
case IS_NOT_NULL:
node.Type = IS_NULL;
node.Text = "{not}" + node.Text;
return(node); // (NOT (IS_NOT_NULL a b) ) => (IS_NULL a b)
case BETWEEN:
node.Type = NOT_BETWEEN;
node.Text = "{not}" + node.Text;
return(node); // (NOT (BETWEEN a b) ) => (NOT_BETWEEN a b)
case NOT_BETWEEN:
node.Type = BETWEEN;
node.Text = "{not}" + node.Text;
return(node); // (NOT (NOT_BETWEEN a b) ) => (BETWEEN a b)
/* This can never happen because this rule will always eliminate the child NOT.
* case NOT:
* return x.getFirstChild(); // (NOT (NOT x) ) => (x)
*/
default:
IASTNode not = (IASTNode)TreeAdaptor.Create(NOT, "not");
not.AddChild(node);
return(not);
}
}
public virtual int LA(int i)
{
return(TreeAdaptor.GetType(LT(i)));
}
public override bool IsEndOfFile(object o)
{
return(TreeAdaptor.GetType(o) == CharStreamConstants.EndOfFile);
}
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Console.WriteLine("---------------");
Console.Error.WriteLine("test.cs");
string file_name = "test.cs";
CommonTokenStream tokens = CreateLexer <csLexer>(file_name);
csParser p = new csParser(tokens);
TreeAdaptor csAdaptor = new TreeAdaptor();
p.TreeAdaptor = csAdaptor;
csParser.compilation_unit_return parser_rt;
CommonTree tree = null;
p.OnDisplayRecognitionError += (err => {
Console.WriteLine(err._errorStr);
});
parser_rt = p.compilation_unit();
#region Error Checking
int count = 0;
tree = (CommonTree)parser_rt.Tree;
// Check if we didn't get an AST
// This often happens if your grammar and tree grammar don't match
if (tree == null)
{
if (tokens.Count > 0)
{
Console.Error.WriteLine("No Tree returned from parsing! (Your rule did not parse correctly)");
}
else
{
// the file was empty, this is not an error.
// Clear archive attribute
File.SetAttributes(file_name, File.GetAttributes(file_name) & ~FileAttributes.Archive);
++count;
}
return;
}
#endregion
if (p.NumberOfSyntaxErrors > 0)
{
List <string> strs = p.ToStrings(tokens.GetTokens());
foreach (var v in strs)
{
// Console.WriteLine(v);
}
}
//Console.WriteLine(tree.ToStringTree());
// Get the AST stream
CommonTreeNodeStream nodes = new CommonTreeNodeStream(csAdaptor, tree);
// Add the tokens for DumpNodes, otherwise there are no token names to print out.
nodes.TokenStream = tokens;
Console.WriteLine(nodes.ToTokenTypeString());
// Dump the tree nodes if -n is passed on the command line.
DumpNodes(nodes);
//SymbolTable symtab = new SymbolTable(); // init symbol table
//Def def = new Def(nodes, symtab); // create Def phase
//def.Downup(tree); // Do pass 1
//System.Console.WriteLine("globals: \n" + symtab.globals + "\n\n");
//System.ConsoleColor restore = System.Console.ForegroundColor;
//System.Console.ForegroundColor = ConsoleColor.Yellow;
//System.Console.WriteLine("Ref:");
//System.Console.ForegroundColor = restore;
//nodes.Reset(); // rewind AST node stream to root
//Ref @ref = new Ref(nodes); // create Ref phase
//@ref.Downup(tree); // Do pass 2
Application.Run(new Form1());
}
