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
|
import org.checkerframework.checker.initialization.qual.*;
import org.checkerframework.checker.nullness.qual.*;
// This test does not correctly work in the FBC system,
// see https://github.com/typetools/checker-framework/issues/223
class RawField {
public @UnknownInitialization RawField a;
public RawField() {
// :: error: (assignment.type.incompatible)
a = null;
this.a = this;
a = this;
}
// :: error: (initialization.fields.uninitialized)
public RawField(boolean foo) {}
void t1() {
// :: error: (method.invocation.invalid)
a.t1();
}
void t2(@UnknownInitialization RawField a) {
this.a = a;
}
}
class Options {
@UnknownInitialization Object arg;
public Options(@UnknownInitialization Object arg) {
this.arg = arg;
}
public void parse_or_usage() {
// use arg only under the assumption that it is @UnknownInitialization
}
}
class MultiVersionControl {
@SuppressWarnings("fbc") // see https://github.com/typetools/checker-framework/issues/223
public void parseArgs(@UnknownInitialization MultiVersionControl this) {
Options options = new Options(this);
options.parse_or_usage();
}
}
// TODO: This checks that forbidden field assignments do not occur. (The
// FBC type system permits arbitrary assignments in a constructor, but it
// also makes assumptions that our implementation does not currently check.)
// class HasStaticUnknownInitializationField {
// static @UnknownInitialization Object f;
// }
//
// class UseUnknownInitializationField {
//
// Object f;
//
// public UseUnknownInitializationField() {
// // :: (initialization.invalid.field.write.in.constructor)
// f = HasStaticUnknownInitializationField.f;
// }
//
// }
|
