* Nashorn parser API provides interfaces to represent ECMAScript source code * as abstract syntax trees (AST) and Parser to parse ECMAScript source scripts. *
** Using parser API user can write Java code to access parse tree * representation of ECMAScript source. Script source may be a file, * a URL or a String. Unless stated otherwise null argument in methods of this * package result in NullPointerException being thrown. *
* *
*
* import jdk.nashorn.api.tree.*;
* import java.io.File;
*
* // Simple example that prints warning on 'with' statements
* public class Main {
* public static void main(String[] args) throws Exception {
* // Create a new parser instance
* Parser parser = Parser.create();
* File sourceFile = new File(args[0]);
*
* // Parse given source File using parse method.
* // Pass a diagnostic listener to print error messages.
* CompilationUnitTree cut = parser.parse(sourceFile,
* (d) -> { System.out.println(d); });
*
* if (cut != null) {
* // call Tree.accept method passing a SimpleTreeVisitor
* cut.accept(new SimpleTreeVisitor<Void, Void>() {
* // visit method for 'with' statement
* public Void visitWith(WithTree wt, Void v) {
* // print warning on 'with' statement
* System.out.println("Warning: using 'with' statement!");
* return null;
* }
* }, null);
* }
* }
* }
*
*
*
* @since 9
*/
package jdk.nashorn.api.tree;