1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
|
/*
* Copyright (c) 2011, 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.
*
* 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.
*/
/*
* @test
* @bug 8003280
* @summary Add lambda tests
* SAM types and method type inference
* @author Brian Goetz
* @author Maurizio Cimadamore
* @run main LambdaConv03
*/
public class LambdaConv03 {
static int assertionCount = 0;
static void assertTrue(boolean cond) {
assertionCount++;
if (!cond)
throw new AssertionError();
}
interface TU<T, U> {
public T foo(U u);
}
public static <T, U> T exec(TU<T, U> lambda, U x) {
return lambda.foo(x);
}
static {
//Covariant returns:
int i1 = exec((Integer x) -> { return x; }, 3);
assertTrue(3 == i1);
//Method resolution with boxing:
int i2 = exec((Integer x) -> { return x; }, 3);
assertTrue(3 == i2);
//Runtime exception transparency:
try {
exec((Object x) -> { return x.hashCode(); }, null);
}
catch (RuntimeException e) {
assertTrue(true);
}
}
{
//Covariant returns:
int i1 = exec((Integer x) -> { return x; }, 3);
assertTrue(3 == i1);
//Method resolution with boxing:
int i2 = exec((Integer x) -> { return x; }, 3);
assertTrue(3 == i2);
//Runtime exception transparency:
try {
exec((Object x) -> { return x.hashCode(); }, null);
}
catch (RuntimeException e) {
assertTrue(true);
}
}
public static void test1() {
//Covariant returns:
int i1 = exec((Integer x) -> { return x; }, 3);
assertTrue(3 == i1);
//Method resolution with boxing:
int i2 = exec((Integer x) -> { return x; }, 3);
assertTrue(3 == i2);
//Runtime exception transparency:
try {
exec((Object x) -> { return x.hashCode(); }, null);
}
catch (RuntimeException e) {
assertTrue(true);
}
}
public void test2() {
//Covariant returns:
int i1 = exec((Integer x) -> { return x; }, 3);
assertTrue(3 == i1);
//Method resolution with boxing:
int i2 = exec((Integer x) -> { return x; }, 3);
assertTrue(3 == i2);
//Runtime exception transparency:
try {
exec((Object x) -> { return x.hashCode(); }, null);
}
catch (RuntimeException e) {
assertTrue(true);
}
}
public static void main(String[] args) {
test1();
new LambdaConv03().test2();
assertTrue(assertionCount == 12);
}
}
|
