/** Find and replace
* ID*[','] with ID (',' ID)*
* ID+[','] with ID (',' ID)+
* (x {action} y)+[','] with x {action} y (',' x {action} y)+
*
* Parameter must be a token.
* todo: do we want?
*/
public virtual void ExpandParameterizedLoops(GrammarAST root)
{
TreeVisitor v = new TreeVisitor(new GrammarASTAdaptor());
Antlr.Runtime.Misc.Func<object, object> preAction =
t =>
{
if (((GrammarAST)t).Type == 3)
{
return ExpandParameterizedLoop((GrammarAST)t);
}
return t;
};
Antlr.Runtime.Misc.Func<object, object> postAction = t => t;
v.Visit(root, new TreeVisitorAction(preAction, postAction));
}
/** Find and replace
* ID*[','] with ID (',' ID)*
* ID+[','] with ID (',' ID)+
* (x {action} y)+[','] with x {action} y (',' x {action} y)+
*
* Parameter must be a token.
* todo: do we want?
*/
public virtual void ExpandParameterizedLoops(GrammarAST root)
{
TreeVisitor v = new TreeVisitor(new GrammarASTAdaptor());
Antlr.Runtime.Misc.Func <object, object> preAction =
t =>
{
if (((GrammarAST)t).Type == 3)
{
return(ExpandParameterizedLoop((GrammarAST)t));
}
return(t);
};
Antlr.Runtime.Misc.Func <object, object> postAction = t => t;
v.Visit(root, new TreeVisitorAction(preAction, postAction));
}
/** Utility visitor that sets grammar ptr in each node */
public static void SetGrammarPtr(Grammar g, GrammarAST tree)
{
if (tree == null)
{
return;
}
// ensure each node has pointer to surrounding grammar
Antlr.Runtime.Misc.Func <object, object> preAction =
t =>
{
((GrammarAST)t).g = g;
return(t);
};
Antlr.Runtime.Misc.Func <object, object> postAction = t => t;
TreeVisitor v = new TreeVisitor(new GrammarASTAdaptor());
v.Visit(tree, new TreeVisitorAction(preAction, postAction));
}
/** For testing; builds trees, does sem anal */
public Grammar(string fileName, string grammarText, Grammar tokenVocabSource, [Nullable] ANTLRToolListener listener)
{
this.text = grammarText;
this.fileName = fileName;
this.tool = new AntlrTool();
this.tool.AddListener(listener);
Antlr.Runtime.ANTLRStringStream @in = new Antlr.Runtime.ANTLRStringStream(grammarText);
@in.name = fileName;
this.ast = tool.Parse(fileName, @in);
if (ast == null)
{
throw new NotSupportedException();
}
if (ast.tokenStream == null)
{
throw new InvalidOperationException("expected ast to have a token stream");
}
this.tokenStream = ast.tokenStream;
this.originalTokenStream = this.tokenStream;
// ensure each node has pointer to surrounding grammar
Antlr.Runtime.Tree.TreeVisitor v = new Antlr.Runtime.Tree.TreeVisitor(new GrammarASTAdaptor());
v.Visit(ast, new SetPointersAction(this));
InitTokenSymbolTables();
if (tokenVocabSource != null)
{
ImportVocab(tokenVocabSource);
}
tool.Process(this, false);
}
/** Utility visitor that sets grammar ptr in each node */
public static void SetGrammarPtr(Grammar g, GrammarAST tree)
{
if (tree == null)
return;
// ensure each node has pointer to surrounding grammar
Antlr.Runtime.Misc.Func<object, object> preAction =
t =>
{
((GrammarAST)t).g = g;
return t;
};
Antlr.Runtime.Misc.Func<object, object> postAction = t => t;
TreeVisitor v = new TreeVisitor(new GrammarASTAdaptor());
v.Visit(tree, new TreeVisitorAction(preAction, postAction));
}
