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
|
/*******************************************************************************
* Copyright (c) 2000, 2017 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
* Stephan Herrmann - Contribution for
* bug 345305 - [compiler][null] Compiler misidentifies a case of "variable can only be null"
*******************************************************************************/
package org.eclipse.jdt.internal.compiler.flow;
import org.eclipse.jdt.core.compiler.CharOperation;
import org.eclipse.jdt.internal.compiler.ast.ASTNode;
import org.eclipse.jdt.internal.compiler.codegen.BranchLabel;
import org.eclipse.jdt.internal.compiler.lookup.BlockScope;
/**
* Reflects the context of code analysis, keeping track of enclosing
* try statements, exception handlers, etc...
*/
public class LabelFlowContext extends SwitchFlowContext {
public char[] labelName;
public LabelFlowContext(FlowContext parent, ASTNode associatedNode, char[] labelName, BranchLabel breakLabel, BlockScope scope) {
super(parent, associatedNode, breakLabel, false, true);
this.labelName = labelName;
checkLabelValidity(scope);
}
void checkLabelValidity(BlockScope scope) {
// check if label was already defined above
FlowContext current = this.getLocalParent();
while (current != null) {
char[] currentLabelName;
if (((currentLabelName = current.labelName()) != null)
&& CharOperation.equals(currentLabelName, this.labelName)) {
scope.problemReporter().alreadyDefinedLabel(this.labelName, this.associatedNode);
}
current = current.getLocalParent();
}
}
@Override
public String individualToString() {
return "Label flow context [label:" + String.valueOf(this.labelName) + "]"; //$NON-NLS-2$ //$NON-NLS-1$
}
@Override
public char[] labelName() {
return this.labelName;
}
}
|
