55306
|
1 |
/*
|
|
2 |
* Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
|
|
3 |
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
|
|
4 |
*
|
|
5 |
* This code is free software; you can redistribute it and/or modify it
|
|
6 |
* under the terms of the GNU General Public License version 2 only, as
|
|
7 |
* published by the Free Software Foundation.
|
|
8 |
*
|
|
9 |
* This code is distributed in the hope that it will be useful, but WITHOUT
|
|
10 |
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
11 |
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
|
12 |
* version 2 for more details (a copy is included in the LICENSE file that
|
|
13 |
* accompanied this code).
|
|
14 |
*
|
|
15 |
* You should have received a copy of the GNU General Public License version
|
|
16 |
* 2 along with this work; if not, write to the Free Software Foundation,
|
|
17 |
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
18 |
*
|
|
19 |
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
|
|
20 |
* or visit www.oracle.com if you need additional information or have any
|
|
21 |
* questions.
|
|
22 |
*/
|
|
23 |
|
|
24 |
/*
|
|
25 |
* @test
|
|
26 |
* @bug 8223305
|
|
27 |
* @summary Verify correct warnings w.r.t. yield
|
55382
|
28 |
* @compile/ref=WarnWrongYieldTest.out -source ${jdk.version} -XDrawDiagnostics -XDshould-stop.at=ATTR WarnWrongYieldTest.java
|
55306
|
29 |
*/
|
|
30 |
|
|
31 |
package t;
|
|
32 |
|
|
33 |
//ERROR - type called yield:
|
|
34 |
import t.WarnWrongYieldTest.yield;
|
|
35 |
|
|
36 |
public class WarnWrongYieldTest {
|
|
37 |
|
|
38 |
// ERROR - class called yield
|
|
39 |
class yield { }
|
|
40 |
|
|
41 |
// OK to have fields called yield
|
|
42 |
String[] yield = null;
|
|
43 |
|
|
44 |
// ERROR - field of type yield
|
|
45 |
yield y;
|
|
46 |
|
|
47 |
// OK to have methods called yield
|
|
48 |
// Nullary yield method
|
|
49 |
String[] yield() {
|
|
50 |
return null;
|
|
51 |
}
|
|
52 |
// Unary yield method
|
|
53 |
String[] yield(int i) {
|
|
54 |
return null;
|
|
55 |
}
|
|
56 |
// Binary yield method
|
|
57 |
String[] yield(int i, int j) {
|
|
58 |
return null;
|
|
59 |
}
|
|
60 |
|
|
61 |
// OK to declare a local called yield
|
|
62 |
void LocalDeclaration1() {
|
|
63 |
int yield;
|
|
64 |
}
|
|
65 |
// OK to declare and initialise a local called yield
|
|
66 |
void LocalDeclaration2() {
|
|
67 |
int yield = 42;
|
|
68 |
}
|
|
69 |
|
|
70 |
void YieldTypedLocals(int i) {
|
|
71 |
// ERROR - Parsed as yield statement, and y1 is unknown
|
|
72 |
yield y1 = null;
|
|
73 |
|
|
74 |
// ERROR - Parsed as yield statement, and y2 is unknown
|
|
75 |
yield y2 = new yield();
|
|
76 |
|
|
77 |
// ERROR - can not create an yield-valued local of type Object
|
|
78 |
Object y3 = new yield();
|
|
79 |
|
|
80 |
// ERROR - can not create a final yield-valued local of type yield
|
|
81 |
final yield y4 = new yield();
|
|
82 |
|
|
83 |
// ERROR - can create a non-final local of type yield using qualified typename
|
|
84 |
WarnWrongYieldTest.yield y5 = new yield();
|
|
85 |
}
|
|
86 |
|
|
87 |
void MethodInvocation(int i) {
|
|
88 |
|
|
89 |
// OK - can access a field called yield
|
|
90 |
String[] x = this.yield;
|
|
91 |
|
|
92 |
// ERROR - calling nullary yield method using simple name parsed as yield statement
|
|
93 |
yield();
|
|
94 |
// OK - can call nullary yield method using qualified name
|
|
95 |
this.yield();
|
|
96 |
|
|
97 |
// ERROR - Calling unary yield method using simple name is parsed as yield statement
|
|
98 |
yield(2);
|
|
99 |
// OK - calling unary yield method using qualified name
|
|
100 |
this.yield(2);
|
|
101 |
|
|
102 |
// ERROR - Calling binary yield method using simple name is parsed as yield statement
|
|
103 |
yield(2, 2); //error
|
|
104 |
// OK - calling binary yield method using qualified name
|
|
105 |
this.yield(2, 2);
|
|
106 |
|
|
107 |
// ERROR - nullary yield method as receiver is parsed as yield statement
|
|
108 |
yield().toString();
|
|
109 |
// OK - nullary yield method as receiver using qualified name
|
|
110 |
this.yield().toString();
|
|
111 |
|
|
112 |
// ERROR - unary yield method as receiver is parsed as yield statement
|
|
113 |
yield(2).toString();
|
|
114 |
// OK - unary yield method as receiver using qualified name
|
|
115 |
this.yield(2).toString();
|
|
116 |
|
|
117 |
// ERROR - binary yield method as receiver is parsed as yield statement
|
|
118 |
yield(2, 2).toString();
|
|
119 |
// OK - binary yield method as receiver using qualified name
|
|
120 |
this.yield(2, 2).toString();
|
|
121 |
|
|
122 |
// OK - yield method call is in an expression position
|
|
123 |
String str = yield(2).toString();
|
|
124 |
|
|
125 |
//OK - yield is a variable
|
|
126 |
yield.toString();
|
|
127 |
|
|
128 |
// OK - parsed as method call (with qualified local yield as receiver)
|
|
129 |
this.yield.toString();
|
|
130 |
|
|
131 |
yield[0].toString(); //error
|
|
132 |
}
|
|
133 |
|
|
134 |
private void yieldLocalVar1(int i) {
|
|
135 |
int yield = 0;
|
|
136 |
|
|
137 |
//OK - yield is a variable:
|
|
138 |
yield++;
|
|
139 |
yield--;
|
|
140 |
|
|
141 |
//OK - yield is a variable:
|
|
142 |
yield = 3;
|
|
143 |
|
|
144 |
//OK - yield is a variable:
|
|
145 |
for (int j = 0; j < 3; j++)
|
|
146 |
yield += 1;
|
|
147 |
|
|
148 |
//OK - yield is a variable and not at the beginning of the statement:
|
|
149 |
yieldLocalVar1(yield);
|
|
150 |
|
|
151 |
//ERROR - unqualified yield method invocation:
|
|
152 |
yieldLocalVar1(yield().length);
|
|
153 |
yieldLocalVar1(yield.class.getModifiers());
|
|
154 |
}
|
|
155 |
|
|
156 |
private void yieldLocalVar2(int i) {
|
|
157 |
int[] yield = new int[1];
|
|
158 |
|
|
159 |
//OK - yield is a variable:
|
|
160 |
yield[0] = 5;
|
|
161 |
}
|
|
162 |
}
|