/*******************************************************************************
- * 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.lookup;
import net.sourceforge.phpdt.internal.compiler.ast.LocalDeclaration;
import net.sourceforge.phpdt.internal.compiler.impl.Constant;
public class LocalVariableBinding extends VariableBinding {
- public boolean isArgument;
+ public boolean isArgument;
public int resolvedPosition; // for code generation (position in method context)
- public boolean used; // for flow analysis
+
+ public static final int UNUSED = 0;
+ public static final int USED = 1;
+ public static final int FAKE_USED = 2;
+ public int useFlag; // for flow analysis (default is UNUSED)
+
public BlockScope declaringScope; // back-pointer to its declaring scope
public LocalDeclaration declaration; // for source-positions
public int[] initializationPCs;
public int initializationCount = 0;
-// for synthetic local variables
-public LocalVariableBinding(char[] name, TypeBinding type, int modifiers, boolean isArgument) {
- this.name = name;
- this.type = type;
- this.modifiers = modifiers;
- if (this.isArgument = isArgument)
- this.constant = Constant.NotAConstant;
-}
+ // for synthetic local variables
+ public LocalVariableBinding(char[] name, TypeBinding type, int modifiers, boolean isArgument) {
-// regular local variable or argument
-public LocalVariableBinding(LocalDeclaration declaration, TypeBinding type, int modifiers, boolean isArgument) {
- this(declaration.name, type, modifiers, isArgument);
- this.declaration = declaration;
-}
-/* API
-* Answer the receiver's binding type from Binding.BindingID.
-*/
+ this.name = name;
+ this.type = type;
+ this.modifiers = modifiers;
+ if (this.isArgument = isArgument)
+ this.constant = Constant.NotAConstant;
+ }
+
+ // regular local variable or argument
+ public LocalVariableBinding(LocalDeclaration declaration, TypeBinding type, int modifiers, boolean isArgument) {
-public final int bindingType() {
- return LOCAL;
-}
-// Answer whether the variable binding is a secret variable added for code gen purposes
+ this(declaration.name, type, modifiers, isArgument);
+ this.declaration = declaration;
+ }
-public boolean isSecret() {
- return declaration == null && !isArgument;
-}
-public void recordInitializationEndPC(int pc) {
- if (initializationPCs[((initializationCount - 1) << 1) + 1] == -1)
- initializationPCs[((initializationCount - 1) << 1) + 1] = pc;
-}
-public void recordInitializationStartPC(int pc) {
- if (initializationPCs == null)
- return;
- // optimize cases where reopening a contiguous interval
- if ((initializationCount > 0) && (initializationPCs[ ((initializationCount - 1) << 1) + 1] == pc)) {
- initializationPCs[ ((initializationCount - 1) << 1) + 1] = -1; // reuse previous interval (its range will be augmented)
- } else {
- int index = initializationCount << 1;
- if (index == initializationPCs.length) {
- System.arraycopy(initializationPCs, 0, (initializationPCs = new int[initializationCount << 2]), 0, index);
+ /* API
+ * Answer the receiver's binding type from Binding.BindingID.
+ */
+ public final int bindingType() {
+
+ return LOCAL;
+ }
+
+ // Answer whether the variable binding is a secret variable added for code gen purposes
+ public boolean isSecret() {
+
+ return declaration == null && !isArgument;
+ }
+
+ public void recordInitializationEndPC(int pc) {
+
+ if (initializationPCs[((initializationCount - 1) << 1) + 1] == -1)
+ initializationPCs[((initializationCount - 1) << 1) + 1] = pc;
+ }
+
+ public void recordInitializationStartPC(int pc) {
+
+ if (initializationPCs == null) return;
+ // optimize cases where reopening a contiguous interval
+ if ((initializationCount > 0) && (initializationPCs[ ((initializationCount - 1) << 1) + 1] == pc)) {
+ initializationPCs[ ((initializationCount - 1) << 1) + 1] = -1; // reuse previous interval (its range will be augmented)
+ } else {
+ int index = initializationCount << 1;
+ if (index == initializationPCs.length) {
+ System.arraycopy(initializationPCs, 0, (initializationPCs = new int[initializationCount << 2]), 0, index);
+ }
+ initializationPCs[index] = pc;
+ initializationPCs[index + 1] = -1;
+ initializationCount++;
}
- initializationPCs[index] = pc;
- initializationPCs[index + 1] = -1;
- initializationCount++;
}
-}
-public String toString() {
- String s = super.toString();
- if (!used)
- s += "[pos: unused]"; //$NON-NLS-1$
- else
- s += "[pos: " + String.valueOf(resolvedPosition) + "]"; //$NON-NLS-2$ //$NON-NLS-1$
- s += "[id:" + String.valueOf(id) + "]"; //$NON-NLS-2$ //$NON-NLS-1$
- if (initializationCount > 0) {
- s += "[pc: "; //$NON-NLS-1$
- for (int i = 0; i < initializationCount; i++) {
- if (i > 0)
- s += ", "; //$NON-NLS-1$
- s += String.valueOf(initializationPCs[i << 1]) + "-" + ((initializationPCs[(i << 1) + 1] == -1) ? "?" : String.valueOf(initializationPCs[(i<< 1) + 1])); //$NON-NLS-2$ //$NON-NLS-1$
+
+ public String toString() {
+
+ String s = super.toString();
+ switch (useFlag){
+ case USED:
+ s += "[pos: " + String.valueOf(resolvedPosition) + "]"; //$NON-NLS-2$ //$NON-NLS-1$
+ break;
+ case UNUSED:
+ s += "[pos: unused]"; //$NON-NLS-1$
+ break;
+ case FAKE_USED:
+ s += "[pos: fake_used]"; //$NON-NLS-1$
+ break;
}
- s += "]"; //$NON-NLS-1$
+ s += "[id:" + String.valueOf(id) + "]"; //$NON-NLS-2$ //$NON-NLS-1$
+ if (initializationCount > 0) {
+ s += "[pc: "; //$NON-NLS-1$
+ for (int i = 0; i < initializationCount; i++) {
+ if (i > 0)
+ s += ", "; //$NON-NLS-1$
+ s += String.valueOf(initializationPCs[i << 1]) + "-" + ((initializationPCs[(i << 1) + 1] == -1) ? "?" : String.valueOf(initializationPCs[(i<< 1) + 1])); //$NON-NLS-2$ //$NON-NLS-1$
+ }
+ s += "]"; //$NON-NLS-1$
+ }
+ return s;
}
- return s;
-}
}
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