--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/sun/tools/tree/ExprExpression.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,126 @@
+/*
+ * Copyright 1994-2003 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+package sun.tools.tree;
+
+import sun.tools.java.*;
+import java.util.Hashtable;
+
+/**
+ * Parenthesised expressions.
+ *
+ * WARNING: The contents of this source file are not part of any
+ * supported API.  Code that depends on them does so at its own risk:
+ * they are subject to change or removal without notice.
+ */
+
+public
+class ExprExpression extends UnaryExpression {
+    /**
+     * Constructor
+     */
+    public ExprExpression(long where, Expression right) {
+        super(EXPR, where, right.type, right);
+    }
+
+    /**
+     * Check a condition.  We must pass it on to our unparenthesised form.
+     */
+    public void checkCondition(Environment env, Context ctx, Vset vset,
+                               Hashtable exp, ConditionVars cvars) {
+        right.checkCondition(env, ctx, vset, exp, cvars);
+        type = right.type;
+    }
+
+    /**
+     * Check the expression if it appears as an lvalue.
+     * We just pass it on to our unparenthesized subexpression.
+     * (Part of fix for 4090372)
+     */
+    public Vset checkAssignOp(Environment env, Context ctx,
+                              Vset vset, Hashtable exp, Expression outside) {
+        vset = right.checkAssignOp(env, ctx, vset, exp, outside);
+        type = right.type;
+        return vset;
+    }
+
+    /**
+     * Delegate to our subexpression.
+     * (Part of fix for 4090372)
+     */
+    public FieldUpdater getUpdater(Environment env, Context ctx) {
+        return right.getUpdater(env, ctx);
+    }
+
+    // Allow (x) = 9;
+    //
+    // I will hold off on this until I'm sure about it.  Nobody's
+    // going to clammer for this one.
+    //
+    // public Vset checkLHS(Environment env, Context ctx,
+    //     Vset vset, Hashtable exp) {
+    //     vset = right.check(env, ctx, vset, exp);
+    //     type = right.type;
+    //     return vset;
+    // }
+
+    public boolean isNull() {
+        return right.isNull();
+    }
+
+    public boolean isNonNull() {
+        return right.isNonNull();
+    }
+
+    // Probably not necessary
+    public Object getValue() {
+        return right.getValue();
+    }
+
+    /**
+     * Delegate to our subexpression.
+     * See the comment in AddExpression#inlineValueSB() for
+     * information about this method.
+     */
+    protected StringBuffer inlineValueSB(Environment env,
+                                         Context ctx,
+                                         StringBuffer buffer) {
+        return right.inlineValueSB(env, ctx, buffer);
+    }
+
+    /**
+     * Select the type of the expression
+     */
+    void selectType(Environment env, Context ctx, int tm) {
+        type = right.type;
+    }
+
+    /**
+     * Simplify
+     */
+    Expression simplify() {
+        return right;
+    }
+}