| /* |
| * Copyright (c) 2005, 2012, 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 com.sun.tools.javac.parser.Tokens.*; |
| import com.sun.tools.javac.util.Position.LineMap; |
| |
| /** |
| * 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 interface Lexer { |
| |
| /** |
| * Consume the next token. |
| */ |
| void nextToken(); |
| |
| /** |
| * Return current token. |
| */ |
| Token token(); |
| |
| /** |
| * Return token with given lookahead. |
| */ |
| Token token(int lookahead); |
| |
| /** |
| * Return the last character position of the previous token. |
| */ |
| Token prevToken(); |
| |
| /** |
| * Splits the current token in two and return the first (splitted) token. |
| * For instance {@literal '<<<'} is split into two tokens |
| * {@literal '<'} and {@literal '<<'} respectively, |
| * and the latter is returned. |
| */ |
| Token split(); |
| |
| /** |
| * Return the position where a lexical error occurred; |
| */ |
| int errPos(); |
| |
| /** |
| * Set the position where a lexical error occurred; |
| */ |
| void errPos(int pos); |
| |
| /** |
| * Build a map for translating between line numbers and |
| * positions in the input. |
| * |
| * @return a LineMap |
| */ |
| LineMap getLineMap(); |
| } |