private SourceEval createWalker(string file)
{
ANTLRFileStream stream = new ANTLRFileStream(file);
SourceExprLexer lex = new SourceExprLexer(stream);
CommonTokenStream tokens = new CommonTokenStream(lex);
SourceExprParser parser = new SourceExprParser(tokens);
SourceExprParser.prog_return r = parser.prog(_script);
// WALK RESULTING TREE
CommonTree t = (CommonTree)r.Tree; // get tree from parser
// Create a tree node stream from resulting tree
CommonTreeNodeStream nodes = new CommonTreeNodeStream(t);
SourceEval walker = new SourceEval(nodes); // create a tree parser
return walker;
}
static string createRewriter(string file, Script script)
{
ANTLRFileStream stream = new ANTLRFileStream(file);
SourceExprLexer lex = new SourceExprLexer(stream);
// create a buffer of tokens pulled from the lexer
// Must use TokenRewriteStream not CommonTokenStream!
TokenRewriteStream tokens = new TokenRewriteStream(lex);
SourceExprParser parser = new SourceExprParser(tokens);
SourceExprParser.prog_return r = parser.prog(script);
// WALK TREE AND REWRITE TOKEN BUFFER
CommonTree t = (CommonTree)r.Tree; // get tree from parser
// create a stream of tree nodes from AST built by parser
CommonTreeNodeStream nodes = new CommonTreeNodeStream(t);
// tell it where it can find the token objects
nodes.TokenStream = tokens;
//SourceRewrite rewriter = new SourceRewrite(nodes);
//rewriter.prog(script);
return tokens.ToString(); // return tweaked token buffer
}
