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
|
/*
* Copyright (c) 2021, 2022, 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 8262891 8310133
* @summary Check errors reported for guarded patterns.
* @compile/fail/ref=GuardsErrors.out -XDrawDiagnostics GuardsErrors.java
*/
//TODO: tests and error recovery for misplaced guards
public class GuardsErrors {
void typeTestPatternSwitchTest(Object o, int check) {
switch (o) {
case Integer i when i == check -> System.err.println(); //error: check is not effectivelly final
default -> {}
}
check = 0;
}
void variablesInGuards(Object o) {
final int i1;
int i2 = 0;
switch (o) {
case Integer v when (i1 = 0) == 0 -> {}
case Integer v when i2++ == 0 -> {}
case Integer v when ++i2 == 0 -> {}
case Integer v when new Predicate() {
public boolean test() {
final int i;
i = 2;
return i == 2;
}
}.test() -> {}
case Integer v when v != null -> {
v = null;
}
case Number v1 when v1 instanceof Integer v2 && (v2 = 0) == 0 -> {}
default -> {}
}
}
GuardsErrors(Object o) {
switch (o) {
case Integer v when (f = 0) == 0 -> {}
default -> throw new RuntimeException();
}
}
final int f;
interface Predicate {
public boolean test();
}
}
|
