1 files changed, 58 insertions, 0 deletions
diff --git a/cpp/src/qpid/broker/SelectorExpression.h b/cpp/src/qpid/broker/SelectorExpression.h
new file mode 100644
index 0000000000..be73d4876c
--- /dev/null
+++ b/cpp/src/qpid/broker/SelectorExpression.h
@@ -0,0 +1,58 @@
+#ifndef QPID_BROKER_SELECTOREXPRESSION_H
+#define QPID_BROKER_SELECTOREXPRESSION_H
+
+/*
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ *
+ */
+
+#include <iosfwd>
+#include <string>
+
+namespace qpid {
+namespace broker {
+
+class SelectorEnv;
+class Tokeniser;
+
+class Expression {
+public:
+    virtual ~Expression() {}
+    virtual void repr(std::ostream&) const = 0;
+    virtual std::string eval(const SelectorEnv&) const = 0;
+};
+
+class BoolExpression {
+public:
+    virtual ~BoolExpression() {};
+    virtual void repr(std::ostream&) const = 0;
+    virtual bool eval(const SelectorEnv&) const = 0;
+};
+
+BoolExpression* parseTopBoolExpression(const std::string& exp);
+BoolExpression* parseBoolExpression(Tokeniser&);
+BoolExpression* parseOrExpression(Tokeniser&);
+BoolExpression* parseAndExpression(Tokeniser&);
+BoolExpression* parseNotExpression(Tokeniser&);
+BoolExpression* parseEqualityExpression(Tokeniser&);
+Expression* parsePrimaryExpression(Tokeniser&);
+
+}}
+
+#endif