Mon, 14 Nov 2011 15:11:10 -0800
7106166: (javac) re-factor EndPos parser
Reviewed-by: jjg
1 /*
2 * Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
26 package com.sun.tools.javac.parser;
28 import com.sun.tools.javac.parser.Tokens.*;
29 import com.sun.tools.javac.util.Position.LineMap;
31 /**
32 * The lexical analyzer maps an input stream consisting of ASCII
33 * characters and Unicode escapes into a token sequence.
34 *
35 * <p><b>This is NOT part of any supported API.
36 * If you write code that depends on this, you do so at your own risk.
37 * This code and its internal interfaces are subject to change or
38 * deletion without notice.</b>
39 */
40 public interface Lexer {
42 /**
43 * Consume the next token.
44 */
45 void nextToken();
47 /**
48 * Return current token.
49 */
50 Token token();
52 /**
53 * Return the last character position of the previous token.
54 */
55 Token prevToken();
57 /**
58 * Splits the current token in two and return the first (splitted) token.
59 * For instance '<<<' is splitted into two tokens '<' and '<<' respectively,
60 * and the latter is returned.
61 */
62 Token split();
64 /**
65 * Return the position where a lexical error occurred;
66 */
67 int errPos();
69 /**
70 * Set the position where a lexical error occurred;
71 */
72 void errPos(int pos);
74 /**
75 * Build a map for translating between line numbers and
76 * positions in the input.
77 *
78 * @return a LineMap
79 */
80 LineMap getLineMap();
81 }