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diff --git a/tools/intergen/model/include/model/constant.h b/tools/intergen/model/include/model/constant.h
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+/**
+ * Copyright (c) 2014, Ford Motor Company
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * Neither the name of the Ford Motor Company nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef CONSTANT_H_
+#define CONSTANT_H_
+
+#include <string>
+
+#include "model/builtin_type.h"
+#include "model/composite_type.h"
+#include "utils/common_types.h"
+
+namespace codegen {
+class Type;
+class ConstantCodeGenerator;
+
+class Constant {
+ public:
+  virtual const Type* type() const = 0;
+  virtual void Apply(ConstantCodeGenerator* generator) const = 0;
+  virtual ~Constant();
+};
+
+class Boolean::Constant : public codegen::Constant {
+ public:
+  ~Constant();
+  bool value() const;
+  bool is_valid() const;
+  bool operator==(const Boolean::Constant& that) const;
+  // codegen::Constant methods
+  virtual const Boolean* type() const;
+  virtual void Apply(ConstantCodeGenerator* generator) const;
+ private:
+  // Methods
+  Constant(const Boolean* type, const std::string& literal);
+
+ private:
+  const Boolean* type_;
+  bool value_;
+  bool valid_;
+  friend class Boolean;
+};
+
+class Integer::Constant : public codegen::Constant {
+ public:
+  ~Constant();
+  // Methods
+  int64_t value() const;
+  bool is_valid() const;
+  bool operator<(const Constant& that) const;
+  // codegen::Constant methods
+  virtual const Integer* type() const;
+  virtual void Apply(ConstantCodeGenerator* generator) const;
+
+ private:
+  // Methods
+  Constant(const Integer* type, const std::string& literal);
+
+ private:
+  // Fields
+  const Integer* type_;
+  int64_t value_;
+  bool valid_;
+  friend class Integer;
+};
+
+class Float::Constant : public codegen::Constant {
+ public:
+  ~Constant();
+  // Methods
+  double value() const;
+  bool is_valid() const;
+  bool operator<(const Constant& that) const;
+  // codegen::Constant methods
+  virtual const Float* type() const;
+  virtual void Apply(ConstantCodeGenerator* generator) const;
+
+ private:
+  // Methods
+  Constant(const Float* type, const std::string& literal);
+
+ private:
+  // Fields
+  const Float* type_;
+  double value_;
+  bool valid_;
+  friend class Float;
+};
+
+class Enum::Constant : public codegen::Constant {
+ public:
+  // Methods
+  ~Constant();
+  const std::string& name() const;
+  int64_t value() const;
+  bool is_value_explicit() const;
+  const Scope& scope() const;
+  const std::string& internal_name() const;
+  const Description& description() const;
+  const std::string& design_description() const;
+
+  // codegen::Constant methods
+  virtual const Enum* type() const;
+  virtual void Apply(ConstantCodeGenerator* generator) const;
+
+ private:
+  // Methods
+  Constant(Enum* enm, const std::string& name, const int64_t value,
+           bool value_explicit, Scope scope, const std::string& internal_name,
+           const Description& description, const std::string& design_description);
+ private:
+  // Fields
+  Enum* type_;
+  std::string name_;
+  int64_t value_;
+  bool value_explicit_;
+  Scope scope_;
+  std::string internal_name_;
+  Description description_;
+  std::string design_description_;
+  friend class Enum;
+};
+
+class ConstantCodeGenerator {
+ public:
+  virtual void GenerateCodeForBooleanConstant(const Boolean::Constant* boolean);
+  virtual void GenerateCodeForIntegerConstant(const Integer::Constant* integer);
+  virtual void GenerateCodeForFloatConstant(const Float::Constant* flt);
+  virtual void GenerateCodeForEnumConstant(const Enum::Constant* enm);
+  virtual ~ConstantCodeGenerator();
+};
+
+}  // namespace codegen
+
+#endif /* CONSTANT_H_ */