first scanner /parser copied from the jdt java version

[phpeclipse.git] / net.sourceforge.phpeclipse / src / net / sourceforge / phpdt / internal / compiler / flow / SwitchFlowContext.java

diff --git a/net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/compiler/flow/SwitchFlowContext.java b/net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/compiler/flow/SwitchFlowContext.java
new file mode 100644 (file)
index 0000000..e156adb
--- /dev/null
+++ b/net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/compiler/flow/SwitchFlowContext.java
@@ -0,0 +1,54 @@
+/*******************************************************************************
+ * 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.flow;
+
+import net.sourceforge.phpdt.internal.compiler.ast.AstNode;
+import net.sourceforge.phpdt.internal.compiler.codegen.Label;
+
+/**
+ * Reflects the context of code analysis, keeping track of enclosing
+ *     try statements, exception handlers, etc...
+ */
+public class SwitchFlowContext extends FlowContext {
+       public Label breakLabel;
+       public UnconditionalFlowInfo initsOnBreak = FlowInfo.DeadEnd;
+       
+       public SwitchFlowContext(
+               FlowContext parent,
+               AstNode associatedNode,
+               Label breakLabel) {
+               super(parent, associatedNode);
+               this.breakLabel = breakLabel;
+       }
+
+       public Label breakLabel() {
+               return breakLabel;
+       }
+
+       public String individualToString() {
+               return "Switch flow context"; //$NON-NLS-1$
+       }
+
+       public boolean isBreakable() {
+               return true;
+       }
+
+       public void recordBreakFrom(FlowInfo flowInfo) {
+               if (initsOnBreak == FlowInfo.DeadEnd) {
+                       initsOnBreak = flowInfo.copy().unconditionalInits();
+               } else {
+                       // ignore if not really reachable (1FKEKRP)
+                       if (flowInfo.isFakeReachable())
+                               return;
+                       initsOnBreak.mergedWith(flowInfo.unconditionalInits());
+               };
+       }
+}
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