var antlr4 = require('antlr4/index');
var BQLXLexer = require('grammar/BQLXLexer').BQLXLexer;
var BQLXParser = require('grammar/BQLXParser').BQLXParser;
function validatePipeline(script) {
var chars = antlr4.InputStream(script);
var lexer = new BQLXLexer(chars);
var tokens = new antlr4.CommonTokenStream(lexer);
var parser = new BQLXParser(tokens);
parser.buildParseTrees = true;
var ast = parser.pipeline();
console.log(ast);
}