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 //------------------------------- -*- C++ -*- -------------------------------//
 // Copyright Celeritas contributors: see top-level COPYRIGHT file for details
 // SPDX-License-Identifier: (Apache-2.0 OR MIT)
 //---------------------------------------------------------------------------//
 //! \file orange/orangeinp/CsgObject.hh
 //! \brief CSG operations on Object instances: negation, union, intersection
 //---------------------------------------------------------------------------//
 #pragma once
 
 #include <string>
 #include <vector>
 
 #include "ObjectInterface.hh"
 
 namespace celeritas
 {
 namespace orangeinp
 {
 //---------------------------------------------------------------------------//
 /*!
  * Everywhere *but* the embedded object.
  */
 class NegatedObject : public ObjectInterface
 {
   public:
     // Construct with the object to negate and an empty name
     explicit NegatedObject(SPConstObject obj);
 
     // Construct with a name and object
     NegatedObject(std::string&& label, SPConstObject obj);
 
     //! Access the daughter object
     SPConstObject const& daughter() const { return obj_; }
 
     //! Get the user-provided label
     std::string_view label() const final { return label_; }
 
     // Construct a volume from this object
     NodeId build(VolumeBuilder&) const final;
 
     // Write the object to JSON
     void output(JsonPimpl*) const final;
 
   private:
     std::string label_;
     SPConstObject obj_;
 };
 
 //---------------------------------------------------------------------------//
 /*!
  * Join all of the given objects with an intersection or union.
  */
 template<OperatorToken Op>
 class JoinObjects : public ObjectInterface
 {
     static_assert(Op == op_and || Op == op_or);
 
   public:
     //!@{
     //! \name Type aliases
     using VecObject = std::vector<SPConstObject>;
     //!@}
 
     //! Operation joining the daughters ("and" or "or")
     static constexpr OperatorToken op_token = Op;
 
   public:
     // Construct a joined object if nontrivial, or return the original
     static SPConstObject or_object(std::string&& label, VecObject&& objects);
 
     // Construct with a label and vector of objects
     JoinObjects(std::string&& label, VecObject&& objects);
 
     //! Access the vector of daughter objects
     VecObject const& daughters() const { return objects_; }
 
     //! Get the user-provided label
     std::string_view label() const final { return label_; }
 
     // Construct a volume from this object
     NodeId build(VolumeBuilder&) const final;
 
     // Write the object to JSON
     void output(JsonPimpl*) const final;
 
   private:
     std::string label_;
     VecObject objects_;
 };
 
 //---------------------------------------------------------------------------//
 // TYPE ALIASES
 //---------------------------------------------------------------------------//
 
 //! Union of the given objects
 using AnyObjects = JoinObjects<op_or>;
 //! Intersection of the given objects
 using AllObjects = JoinObjects<op_and>;
 
 //! Shared pointer to an object
 using SPConstObject = std::shared_ptr<ObjectInterface const>;
 //! Type used for defining a Region Definition Vector (RDV)
 using VecSenseObj = std::vector<std::pair<Sense, SPConstObject>>;
 
 //---------------------------------------------------------------------------//
 // FREE FUNCTIONS
 //---------------------------------------------------------------------------//
 
 // Make a new object that is the second object subtracted from the first
 std::shared_ptr<AllObjects const>
 make_subtraction(std::string&& label,
                  SPConstObject const& minuend,
                  SPConstObject const& subtrahend);
 
 // Make a combination of possibly negated objects
 std::shared_ptr<AllObjects const>
 make_rdv(std::string&& label, VecSenseObj&& rdv);
 
 //---------------------------------------------------------------------------//
 }  // namespace orangeinp
 }  // namespace celeritas

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