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annotate graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/SLTypes.java @ 11546:f1c3f50ac36e

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SL: added an implicit cast to SL-type system.
author Christian Humer <christian.humer@gmail.com>
date Fri, 06 Sep 2013 16:17:01 +0200
parents 79041ab43660
children 3faec5ab0696
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1 /*
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2 * Copyright (c) 2012, 2012, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.oracle.truffle.sl;
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24
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25 import java.math.*;
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26
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27 import com.oracle.truffle.api.dsl.*;
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28
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29 @TypeSystem({int.class, BigInteger.class, boolean.class, String.class})
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30 public class SLTypes {
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31
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32 @TypeCheck
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33 public boolean isInteger(Object value) {
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34 return value instanceof Integer || (value instanceof BigInteger && ((BigInteger) value).bitLength() < Integer.SIZE);
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35 }
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36
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37 @TypeCast
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38 public int asInteger(Object value) {
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39 assert isInteger(value);
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40 if (value instanceof Integer) {
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41 return (int) value;
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42 } else {
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43 int result = ((BigInteger) value).intValue();
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44 assert BigInteger.valueOf(result).equals(value) : "Losing precision";
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45 return result;
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46 }
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47 }
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48
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49 @TypeCheck
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50 public boolean isBigInteger(Object value) {
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51 return value instanceof Integer || value instanceof BigInteger;
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52 }
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53
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54 @TypeCast
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55 public BigInteger asBigInteger(Object value) {
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56 if (value instanceof Integer) {
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57 return BigInteger.valueOf((int) value);
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58 } else {
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59 return (BigInteger) value;
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60 }
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61 }
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62
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63 @TypeCast
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64 public BigInteger asBigInteger(int value) {
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65 return BigInteger.valueOf(value);
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66 }
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67
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68 @TypeCheck
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69 public boolean isBigInteger(@SuppressWarnings("unused") int value) {
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70 return true;
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71 }
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72
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73 @ImplicitCast
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74 public BigInteger castBigInteger(int value) {
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75 return BigInteger.valueOf(value);
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76 }
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77 }