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diff --git a/compiler/cpp/src/parse/t_scope.h b/compiler/cpp/src/parse/t_scope.h
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+++ b/compiler/cpp/src/parse/t_scope.h
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+/*
+ * 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.
+ */
+
+#ifndef T_SCOPE_H
+#define T_SCOPE_H
+
+#include <map>
+#include <string>
+
+#include "t_type.h"
+#include "t_service.h"
+
+/**
+ * This represents a variable scope used for looking up predefined types and
+ * services. Typically, a scope is associated with a t_program. Scopes are not
+ * used to determine code generation, but rather to resolve identifiers at
+ * parse time.
+ *
+ */
+class t_scope {
+ public:
+  t_scope() {}
+
+  void add_type(std::string name, t_type* type) {
+    types_[name] = type;
+  }
+
+  t_type* get_type(std::string name) {
+    return types_[name];
+  }
+
+  void add_service(std::string name, t_service* service) {
+    services_[name] = service;
+  }
+
+  t_service* get_service(std::string name) {
+    return services_[name];
+  }
+
+  void add_constant(std::string name, t_const* constant) {
+    constants_[name] = constant;
+  }
+
+  t_const* get_constant(std::string name) {
+    return constants_[name];
+  }
+
+  void print() {
+    std::map<std::string, t_type*>::iterator iter;
+    for (iter = types_.begin(); iter != types_.end(); ++iter) {
+      printf("%s => %s\n",
+             iter->first.c_str(),
+             iter->second->get_name().c_str());
+    }
+  }
+
+ private:
+
+  // Map of names to types
+  std::map<std::string, t_type*> types_;
+
+  // Map of names to constants
+  std::map<std::string, t_const*> constants_;
+
+  // Map of names to services
+  std::map<std::string, t_service*> services_;
+
+};
+
+#endif