package test.antlr.pie;
/***
* Excerpted from "The Definitive ANTLR Reference",
* published by The Pragmatic Bookshelf.
* Copyrights apply to this code. It may not be used to create training material,
* courses, books, articles, and the like. Contact us if you are in doubt.
* We make no guarantees that this code is fit for any purpose.
* Visit http://www.pragmaticprogrammer.com/titles/tpantlr for more book information.
***/
public class Test {
public static void main(String[] args) throws Exception {
// // Create an input character stream from standard in
// ANTLRInputStream input = new ANTLRInputStream(System.in);
// // Create an ExprLexer that feeds from that stream
// ExprLexer lexer = new ExprLexer(input);
// // Create a stream of tokens fed by the lexer
// CommonTokenStream tokens = new CommonTokenStream(lexer);
// // Create a parser that feeds off the token stream
// ExprParser parser = new ExprParser(tokens);
// // Begin parsing at rule prog, get return value structure
// ExprParser.prog_return r = parser.prog();
//
// // WALK RESULTING TREE
// CommonTree t = (CommonTree)r.getTree(); // get tree from parser
// // Create a tree node stream from resulting tree
// CommonTreeNodeStream nodes = new CommonTreeNodeStream(t);
// Eval walker = new Eval(nodes); // create a tree parser
// walker.prog(); // launch at start rule prog
}
}