first scanner /parser copied from the jdt java version

[phpeclipse.git] / net.sourceforge.phpeclipse / src / net / sourceforge / phpdt / internal / compiler / lookup / LocalVariableBinding.java

diff --git a/net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/compiler/lookup/LocalVariableBinding.java b/net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/compiler/lookup/LocalVariableBinding.java
new file mode 100644 (file)
index 0000000..0d454fb
--- /dev/null
+++ b/net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/compiler/lookup/LocalVariableBinding.java
@@ -0,0 +1,91 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2001, 2002 International Business Machines Corp. and others.
+ * All rights reserved. This program and the accompanying materials 
+ * are made available under the terms of the Common Public License v0.5 
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/cpl-v05.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 int resolvedPosition; // for code generation (position in method context)
+       public boolean used; // for flow analysis
+       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;
+}
+
+// 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.
+*/
+
+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++;
+       }
+}
+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])); //$NON-NLS-2$ //$NON-NLS-1$
+               }
+               s += "]"; //$NON-NLS-1$
+       }
+       return s;
+}
+}