Fri, 05 Jul 2013 11:04:22 +0100
8016702: use of ternary operator in lambda expression gives incorrect results
Summary: Constant types erroneously creep in during inference
Reviewed-by: jjg, vromero
mcimadamore@1415 | 1 | /* |
mcimadamore@1415 | 2 | * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved. |
mcimadamore@1415 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
mcimadamore@1415 | 4 | * |
mcimadamore@1415 | 5 | * This code is free software; you can redistribute it and/or modify it |
mcimadamore@1415 | 6 | * under the terms of the GNU General Public License version 2 only, as |
mcimadamore@1415 | 7 | * published by the Free Software Foundation. |
mcimadamore@1415 | 8 | * |
mcimadamore@1415 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
mcimadamore@1415 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
mcimadamore@1415 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
mcimadamore@1415 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
mcimadamore@1415 | 13 | * accompanied this code). |
mcimadamore@1415 | 14 | * |
mcimadamore@1415 | 15 | * You should have received a copy of the GNU General Public License version |
mcimadamore@1415 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
mcimadamore@1415 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
mcimadamore@1415 | 18 | * |
mcimadamore@1415 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
mcimadamore@1415 | 20 | * or visit www.oracle.com if you need additional information or have any |
mcimadamore@1415 | 21 | * questions. |
mcimadamore@1415 | 22 | */ |
mcimadamore@1415 | 23 | |
mcimadamore@1415 | 24 | /* |
mcimadamore@1415 | 25 | * @test |
mcimadamore@1415 | 26 | * @bug 8003280 |
mcimadamore@1415 | 27 | * @summary Add lambda tests |
mcimadamore@1415 | 28 | * basic test for lambda conversion |
mcimadamore@1415 | 29 | * @author Brian Goetz |
mcimadamore@1415 | 30 | * @author Maurizio Cimadamore |
mcimadamore@1415 | 31 | * @run main LambdaConv01 |
mcimadamore@1415 | 32 | */ |
mcimadamore@1415 | 33 | |
mcimadamore@1415 | 34 | public class LambdaConv01 { |
mcimadamore@1415 | 35 | |
mcimadamore@1415 | 36 | static int assertionCount = 0; |
mcimadamore@1415 | 37 | |
mcimadamore@1415 | 38 | static void assertTrue(boolean cond) { |
mcimadamore@1415 | 39 | assertionCount++; |
mcimadamore@1415 | 40 | if (!cond) |
mcimadamore@1415 | 41 | throw new AssertionError(); |
mcimadamore@1415 | 42 | } |
mcimadamore@1415 | 43 | |
mcimadamore@1415 | 44 | interface IntToInt { |
mcimadamore@1415 | 45 | public int foo(int x); |
mcimadamore@1415 | 46 | } |
mcimadamore@1415 | 47 | |
mcimadamore@1415 | 48 | interface IntToVoid { |
mcimadamore@1415 | 49 | public void foo(int x); |
mcimadamore@1415 | 50 | } |
mcimadamore@1415 | 51 | |
mcimadamore@1415 | 52 | interface VoidToInt { |
mcimadamore@1415 | 53 | public int foo(); |
mcimadamore@1415 | 54 | } |
mcimadamore@1415 | 55 | |
mcimadamore@1415 | 56 | interface TU<T, U> { |
mcimadamore@1415 | 57 | public T foo(U u); |
mcimadamore@1415 | 58 | } |
mcimadamore@1415 | 59 | |
mcimadamore@1415 | 60 | public static <T, U> T exec(TU<T, U> lambda, U x) { |
mcimadamore@1415 | 61 | return lambda.foo(x); |
mcimadamore@1415 | 62 | } |
mcimadamore@1415 | 63 | |
mcimadamore@1415 | 64 | static { |
mcimadamore@1415 | 65 | //Assignment conversion: |
mcimadamore@1415 | 66 | VoidToInt f1 = ()-> 3; |
mcimadamore@1415 | 67 | assertTrue(3 == f1.foo()); |
mcimadamore@1415 | 68 | //Covariant returns: |
mcimadamore@1415 | 69 | TU<Number, Integer> f2 = (Integer x) -> x; |
emc@1869 | 70 | assertTrue(3 == f2.foo(3).intValue()); |
mcimadamore@1415 | 71 | //Method resolution with boxing: |
mcimadamore@1415 | 72 | int res = LambdaConv01.<Integer,Integer>exec((Integer x) -> x, 3); |
mcimadamore@1415 | 73 | assertTrue(3 == res); |
mcimadamore@1415 | 74 | //Runtime exception transparency: |
mcimadamore@1415 | 75 | try { |
mcimadamore@1415 | 76 | LambdaConv01.<Integer,Object>exec((Object x) -> x.hashCode(), null); |
mcimadamore@1415 | 77 | } |
mcimadamore@1415 | 78 | catch (RuntimeException e) { |
mcimadamore@1415 | 79 | assertTrue(true); |
mcimadamore@1415 | 80 | } |
mcimadamore@1415 | 81 | } |
mcimadamore@1415 | 82 | |
mcimadamore@1415 | 83 | { |
mcimadamore@1415 | 84 | //Assignment conversion: |
mcimadamore@1415 | 85 | VoidToInt f1 = ()-> 3; |
mcimadamore@1415 | 86 | assertTrue(3 == f1.foo()); |
mcimadamore@1415 | 87 | //Covariant returns: |
mcimadamore@1415 | 88 | TU<Number, Integer> f2 = (Integer x) -> x; |
emc@1869 | 89 | assertTrue(3 == f2.foo(3).intValue()); |
mcimadamore@1415 | 90 | //Method resolution with boxing: |
mcimadamore@1415 | 91 | int res = LambdaConv01.<Integer,Integer>exec((Integer x) -> x, 3); |
mcimadamore@1415 | 92 | assertTrue(3 == res); |
mcimadamore@1415 | 93 | //Runtime exception transparency: |
mcimadamore@1415 | 94 | try { |
mcimadamore@1415 | 95 | LambdaConv01.<Integer,Object>exec((Object x) -> x.hashCode(), null); |
mcimadamore@1415 | 96 | } |
mcimadamore@1415 | 97 | catch (RuntimeException e) { |
mcimadamore@1415 | 98 | assertTrue(true); |
mcimadamore@1415 | 99 | } |
mcimadamore@1415 | 100 | } |
mcimadamore@1415 | 101 | |
mcimadamore@1415 | 102 | public static void test1() { |
mcimadamore@1415 | 103 | //Assignment conversion: |
mcimadamore@1415 | 104 | VoidToInt f1 = ()-> 3; |
mcimadamore@1415 | 105 | assertTrue(3 == f1.foo()); |
mcimadamore@1415 | 106 | //Covariant returns: |
mcimadamore@1415 | 107 | TU<Number, Integer> f2 = (Integer x) -> x; |
emc@1869 | 108 | assertTrue(3 == f2.foo(3).intValue()); |
mcimadamore@1415 | 109 | //Method resolution with boxing: |
mcimadamore@1415 | 110 | int res = LambdaConv01.<Integer,Integer>exec((Integer x) -> x, 3); |
mcimadamore@1415 | 111 | assertTrue(3 == res); |
mcimadamore@1415 | 112 | //Runtime exception transparency: |
mcimadamore@1415 | 113 | try { |
mcimadamore@1415 | 114 | LambdaConv01.<Integer,Object>exec((Object x) -> x.hashCode(), null); |
mcimadamore@1415 | 115 | } |
mcimadamore@1415 | 116 | catch (RuntimeException e) { |
mcimadamore@1415 | 117 | assertTrue(true); |
mcimadamore@1415 | 118 | } |
mcimadamore@1415 | 119 | } |
mcimadamore@1415 | 120 | |
mcimadamore@1415 | 121 | public void test2() { |
mcimadamore@1415 | 122 | //Assignment conversion: |
mcimadamore@1415 | 123 | VoidToInt f1 = ()-> 3; |
mcimadamore@1415 | 124 | assertTrue(3 == f1.foo()); |
mcimadamore@1415 | 125 | //Covariant returns: |
mcimadamore@1415 | 126 | TU<Number, Integer> f2 = (Integer x) -> x; |
emc@1869 | 127 | assertTrue(3 == f2.foo(3).intValue()); |
mcimadamore@1415 | 128 | //Method resolution with boxing: |
mcimadamore@1415 | 129 | int res = LambdaConv01.<Integer,Integer>exec((Integer x) -> x, 3); |
mcimadamore@1415 | 130 | assertTrue(3 == res); |
mcimadamore@1415 | 131 | //Runtime exception transparency: |
mcimadamore@1415 | 132 | try { |
mcimadamore@1415 | 133 | LambdaConv01.<Integer,Object>exec((Object x) -> x.hashCode(), null); |
mcimadamore@1415 | 134 | } |
mcimadamore@1415 | 135 | catch (RuntimeException e) { |
mcimadamore@1415 | 136 | assertTrue(true); |
mcimadamore@1415 | 137 | } |
mcimadamore@1415 | 138 | } |
mcimadamore@1415 | 139 | |
mcimadamore@1415 | 140 | public static void main(String[] args) { |
mcimadamore@1415 | 141 | test1(); |
mcimadamore@1415 | 142 | new LambdaConv01().test2(); |
mcimadamore@1415 | 143 | assertTrue(assertionCount == 16); |
mcimadamore@1415 | 144 | } |
mcimadamore@1415 | 145 | } |