spl.java

来自「java 编译器java复杂编译器,可以编译java文件的类库」· Java 代码 · 共 55 行

/*
 * Copyright © 2002 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * California 95054, U.S.A. All rights reserved.  Sun Microsystems, Inc. has
 * intellectual property rights relating to technology embodied in the product
 * that is described in this document. In particular, and without limitation,
 * these intellectual property rights may include one or more of the U.S.
 * patents listed at http://www.sun.com/patents and one or more additional
 * patents or pending patent applications in the U.S. and in other countries.
 * U.S. Government Rights - Commercial software. Government users are subject
 * to the Sun Microsystems, Inc. standard license agreement and applicable
 * provisions of the FAR and its supplements.  Use is subject to license terms.
 * Sun,  Sun Microsystems,  the Sun logo and  Java are trademarks or registered
 * trademarks of Sun Microsystems, Inc. in the U.S. and other countries.  This
 * product is covered and controlled by U.S. Export Control laws and may be
 * subject to the export or import laws in other countries.  Nuclear, missile,
 * chemical biological weapons or nuclear maritime end uses or end users,
 * whether direct or indirect, are strictly prohibited.  Export or reexport
 * to countries subject to U.S. embargo or to entities identified on U.S.
 * export exclusion lists, including, but not limited to, the denied persons
 * and specially designated nationals lists is strictly prohibited.
 */



class SPL {

  public static void main(String args[]) {
    SPLParser parser;
    if (args.length == 1) {
      System.out.println("Stupid Programming Language Interpreter Version 0.1:  Reading from file " + args[0] + " . . .");
      try {
        parser = new SPLParser(new java.io.FileInputStream(args[0]));
      } catch (java.io.FileNotFoundException e) {
        System.out.println("Stupid Programming Language Interpreter Version 0.1:  File " + args[0] + " not found.");
        return;
      }
    } else {
      System.out.println("Stupid Programming Language Interpreter Version 0.1:  Usage :");
      System.out.println("         java SPL inputfile");
      return;
    }
    try {
      parser.CompilationUnit();
      parser.jjtree.rootNode().interpret();
    } catch (ParseException e) {
      System.out.println("Stupid Programming Language Interpreter Version 0.1:  Encountered errors during parse.");
      e.printStackTrace();
    } catch (Exception e1) {
      System.out.println("Stupid Programming Language Interpreter Version 0.1:  Encountered errors during interpretation/tree building.");
      e1.printStackTrace();
    }
  }
}