/** * @(#)Position.java	1.10 03/01/23 * * Copyright 2003 Sun Microsystems, Inc. All rights reserved. * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. */package com.sun.tools.javac.v8.util;/** * A class that encodes and decodes source code positions. Source code *  positions are internally represented as integers that contain *  both column and line number information. */public class Position {    public Position() {        super();    }    /**      * Source file positions are integers in the format:      *  line-number << LINESHIFT + column-number      *  NOPOS represents an undefined position.      */    public static final int LINESHIFT = 10;    public static final int COLUMNMASK = (1 << LINESHIFT) - 1;    public static final int NOPOS = 0;    public static final int FIRSTPOS = (1 << LINESHIFT) + 1;    public static final int MAXPOS = Integer.MAX_VALUE;    /**     * The line number of the given position.     */    public static int line(int pos) {        return pos >>> LINESHIFT;    }    /**      * The column number of the given position.      */    public static int column(int pos) {        return pos & COLUMNMASK;    }    /**      * Form a position from a line number and a column number.      */    public static int make(int line, int col) {        return (line << LINESHIFT) + col;    }}