/*******************************************************************************
- * Copyright (c) 2000, 2001, 2002 International Business Machines Corp. and others.
+ * Copyright (c) 2000, 2003 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
- * are made available under the terms of the Common Public License v0.5
+ * are made available under the terms of the Common Public License v1.0
* which accompanies this distribution, and is available at
- * http://www.eclipse.org/legal/cpl-v05.html
+ * http://www.eclipse.org/legal/cpl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
- ******************************************************************************/
+ *******************************************************************************/
package net.sourceforge.phpdt.internal.compiler.flow;
-import net.sourceforge.phpdt.internal.compiler.ast.AstNode;
-import net.sourceforge.phpdt.internal.compiler.ast.NameReference;
+import net.sourceforge.phpdt.internal.compiler.ast.ASTNode;
import net.sourceforge.phpdt.internal.compiler.ast.Reference;
import net.sourceforge.phpdt.internal.compiler.codegen.Label;
import net.sourceforge.phpdt.internal.compiler.lookup.BlockScope;
import net.sourceforge.phpdt.internal.compiler.lookup.VariableBinding;
/**
- * Reflects the context of code analysis, keeping track of enclosing
- * try statements, exception handlers, etc...
+ * Reflects the context of code analysis, keeping track of enclosing try
+ * statements, exception handlers, etc...
*/
public class LoopingFlowContext extends SwitchFlowContext {
+
public Label continueLabel;
- public UnconditionalFlowInfo initsOnContinue = FlowInfo.DeadEnd;
+
+ public UnconditionalFlowInfo initsOnContinue = FlowInfo.DEAD_END;
+
Reference finalAssignments[];
+
VariableBinding finalVariables[];
+
int assignCount = 0;
+
Scope associatedScope;
- public LoopingFlowContext(
- FlowContext parent,
- AstNode associatedNode,
- Label breakLabel,
- Label continueLabel,
- Scope associatedScope) {
+
+ public LoopingFlowContext(FlowContext parent, ASTNode associatedNode,
+ Label breakLabel, Label continueLabel, Scope associatedScope) {
super(parent, associatedNode, breakLabel);
this.continueLabel = continueLabel;
this.associatedScope = associatedScope;
}
-
- public void complainOnFinalAssignmentsInLoop(
- BlockScope scope,
- FlowInfo flowInfo) {
+
+ public void complainOnFinalAssignmentsInLoop(BlockScope scope,
+ FlowInfo flowInfo) {
for (int i = 0; i < assignCount; i++) {
- VariableBinding variable;
- if ((variable = finalVariables[i]) != null) {
- boolean complained; // remember if have complained on this final assignment
- if (variable instanceof FieldBinding) {
- if (complained = flowInfo.isPotentiallyAssigned((FieldBinding) variable)) {
- scope.problemReporter().duplicateInitializationOfBlankFinalField(
- (FieldBinding) variable,
- (NameReference) finalAssignments[i]);
- }
- } else {
- if (complained =
- flowInfo.isPotentiallyAssigned((LocalVariableBinding) variable)) {
- scope.problemReporter().duplicateInitializationOfFinalLocal(
- (LocalVariableBinding) variable,
- (NameReference) finalAssignments[i]);
- }
+ VariableBinding variable = finalVariables[i];
+ if (variable == null)
+ continue;
+ boolean complained = false; // remember if have complained on this
+ // final assignment
+ if (variable instanceof FieldBinding) {
+ if (flowInfo.isPotentiallyAssigned((FieldBinding) variable)) {
+ complained = true;
+ scope.problemReporter()
+ .duplicateInitializationOfBlankFinalField(
+ (FieldBinding) variable,
+ finalAssignments[i]);
+ }
+ } else {
+ if (flowInfo
+ .isPotentiallyAssigned((LocalVariableBinding) variable)) {
+ complained = true;
+ scope.problemReporter()
+ .duplicateInitializationOfFinalLocal(
+ (LocalVariableBinding) variable,
+ finalAssignments[i]);
}
- // any reference reported at this level is removed from the parent context where it
- // could also be reported again
- if (complained) {
- FlowContext context = parent;
- while (context != null) {
- context.removeFinalAssignmentIfAny(finalAssignments[i]);
- context = context.parent;
- }
+ }
+ // any reference reported at this level is removed from the parent
+ // context where it
+ // could also be reported again
+ if (complained) {
+ FlowContext context = parent;
+ while (context != null) {
+ context.removeFinalAssignmentIfAny(finalAssignments[i]);
+ context = context.parent;
}
}
}
}
public String individualToString() {
- return "Looping flow context"; //$NON-NLS-1$
+ StringBuffer buffer = new StringBuffer("Looping flow context"); //$NON-NLS-1$
+ buffer
+ .append("[initsOnBreak -").append(initsOnBreak.toString()).append(']'); //$NON-NLS-1$
+ buffer
+ .append("[initsOnContinue -").append(initsOnContinue.toString()).append(']'); //$NON-NLS-1$
+ return buffer.toString();
}
public boolean isContinuable() {
}
public boolean isContinuedTo() {
- return initsOnContinue != FlowInfo.DeadEnd;
+ return initsOnContinue != FlowInfo.DEAD_END;
}
public void recordContinueFrom(FlowInfo flowInfo) {
- if (initsOnContinue == FlowInfo.DeadEnd) {
+
+ if (!flowInfo.isReachable())
+ return;
+ if (initsOnContinue == FlowInfo.DEAD_END) {
initsOnContinue = flowInfo.copy().unconditionalInits();
} else {
- // ignore if not really reachable (1FKEKRP)
- if (flowInfo.isFakeReachable())
- return;
- initsOnContinue.mergedWith(flowInfo.unconditionalInits());
- };
+ initsOnContinue = initsOnContinue.mergedWith(flowInfo
+ .unconditionalInits());
+ }
+ ;
}
- boolean recordFinalAssignment(
- VariableBinding binding,
- Reference finalAssignment) {
+ boolean recordFinalAssignment(VariableBinding binding,
+ Reference finalAssignment) {
// do not consider variables which are defined inside this loop
if (binding instanceof LocalVariableBinding) {
Scope scope = ((LocalVariableBinding) binding).declaringScope;
finalVariables = new VariableBinding[5];
} else {
if (assignCount == finalAssignments.length)
- System.arraycopy(
- finalAssignments,
- 0,
- (finalAssignments = new Reference[assignCount * 2]),
- 0,
+ System.arraycopy(finalAssignments, 0,
+ (finalAssignments = new Reference[assignCount * 2]), 0,
+ assignCount);
+ System.arraycopy(finalVariables, 0,
+ (finalVariables = new VariableBinding[assignCount * 2]), 0,
assignCount);
- System.arraycopy(
- finalVariables,
- 0,
- (finalVariables = new VariableBinding[assignCount * 2]),
- 0,
- assignCount);
- };
+ }
+ ;
finalAssignments[assignCount] = finalAssignment;
finalVariables[assignCount++] = binding;
return true;
}
}
}
-}
\ No newline at end of file
+}
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