jdk8-mips64-public/langtools: src/share/classes/com/sun/tools/javac/parser/Scanner.java@af8417e590f4 (annotated)

src/share/classes/com/sun/tools/javac/parser/Scanner.java@af8417e590f4 (annotated)

src/share/classes/com/sun/tools/javac/parser/Scanner.java

Sun, 17 Feb 2013 16:44:55 -0500

author: dholmes
date: Sun, 17 Feb 2013 16:44:55 -0500
changeset 1571: af8417e590f4
parent 1521: 71f35e4b93a5
child 2525: 2eb010b6cb22
permissions: -rw-r--r--

Merge

 /*
  * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Oracle designates this
  * particular file as subject to the "Classpath" exception as provided
  * by Oracle in the LICENSE file that accompanied this code.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */
 package com.sun.tools.javac.parser;
 import java.nio.*;
 import java.util.List;
 import java.util.ArrayList;
 import com.sun.tools.javac.util.Position.LineMap;
 import com.sun.tools.javac.parser.JavaTokenizer.*;
 import static com.sun.tools.javac.parser.Tokens.*;
 /** The lexical analyzer maps an input stream consisting of
  *  ASCII characters and Unicode escapes into a token sequence.
  *
  *  <p><b>This is NOT part of any supported API.
  *  If you write code that depends on this, you do so at your own risk.
  *  This code and its internal interfaces are subject to change or
  *  deletion without notice.</b>
  */
 public class Scanner implements Lexer {
     private Tokens tokens;
     /** The token, set by nextToken().
      */
     private Token token;
     /** The previous token, set by nextToken().
      */
     private Token prevToken;
     /** Buffer of saved tokens (used during lookahead)
      */
     private List<Token> savedTokens = new ArrayList<Token>();
     private JavaTokenizer tokenizer;
     /**
      * Create a scanner from the input array.  This method might
      * modify the array.  To avoid copying the input array, ensure
      * that {@code inputLength < input.length} or
      * {@code input[input.length -1]} is a white space character.
      *
      * @param fac the factory which created this Scanner
      * @param buf the input, might be modified
      * Must be positive and less than or equal to input.length.
      */
     protected Scanner(ScannerFactory fac, CharBuffer buf) {
         this(fac, new JavaTokenizer(fac, buf));
     }
     protected Scanner(ScannerFactory fac, char[] buf, int inputLength) {
         this(fac, new JavaTokenizer(fac, buf, inputLength));
     }
     protected Scanner(ScannerFactory fac, JavaTokenizer tokenizer) {
         this.tokenizer = tokenizer;
         tokens = fac.tokens;
         token = prevToken = DUMMY;
     }
     public Token token() {
         return token(0);
     }
     public Token token(int lookahead) {
         if (lookahead == 0) {
             return token;
         } else {
             ensureLookahead(lookahead);
             return savedTokens.get(lookahead - 1);
         }
     }
     //where
         private void ensureLookahead(int lookahead) {
             for (int i = savedTokens.size() ; i < lookahead ; i ++) {
                 savedTokens.add(tokenizer.readToken());
             }
         }
     public Token prevToken() {
         return prevToken;
     }
     public void nextToken() {
         prevToken = token;
         if (!savedTokens.isEmpty()) {
             token = savedTokens.remove(0);
         } else {
             token = tokenizer.readToken();
         }
     }
     public Token split() {
         Token[] splitTokens = token.split(tokens);
         prevToken = splitTokens[0];
         token = splitTokens[1];
         return token;
     }
     public LineMap getLineMap() {
         return tokenizer.getLineMap();
     }
     public int errPos() {
         return tokenizer.errPos();
     }
     public void errPos(int pos) {
         tokenizer.errPos(pos);
     }
 }

Mercurial > jdk8-mips64-public > langtools / annotate

src/share/classes/com/sun/tools/javac/parser/Scanner.java@af8417e590f4 (annotated)

src/share/classes/com/sun/tools/javac/parser/Scanner.java