jdk8-mips64-public/langtools: src/share/classes/com/sun/tools/javac/parser/Lexer.java@af8417e590f4

     1 /*

     2  * Copyright (c) 2005, 2012, 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 token with given lookahead.

    54      */

    55     Token token(int lookahead);

    57     /**

    58      * Return the last character position of the previous token.

    59      */

    60     Token prevToken();

    62     /**

    63      * Splits the current token in two and return the first (splitted) token.

    64      * For instance {@literal '<<<'} is split into two tokens

    65      * {@literal '<'} and {@literal '<<'} respectively,

    66      * and the latter is returned.

    67      */

    68     Token split();

    70     /**

    71      * Return the position where a lexical error occurred;

    72      */

    73     int errPos();

    75     /**

    76      * Set the position where a lexical error occurred;

    77      */

    78     void errPos(int pos);

    80     /**

    81      * Build a map for translating between line numbers and

    82      * positions in the input.

    83      *

    84      * @return a LineMap

    85      */

    86     LineMap getLineMap();

    87 }

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