.. _program_listing_file_src_ifcparse_IfcWrite.h:

Program Listing for File IfcWrite.h
===================================

|exhale_lsh| :ref:`Return to documentation for file <file_src_ifcparse_IfcWrite.h>` (``src/ifcparse/IfcWrite.h``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   /********************************************************************************
    *                                                                              *
    * This file is part of IfcOpenShell.                                           *
    *                                                                              *
    * IfcOpenShell is free software: you can redistribute it and/or modify         *
    * it under the terms of the Lesser GNU General Public License as published by  *
    * the Free Software Foundation, either version 3.0 of the License, or          *
    * (at your option) any later version.                                          *
    *                                                                              *
    * IfcOpenShell 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                 *
    * Lesser GNU General Public License for more details.                          *
    *                                                                              *
    * You should have received a copy of the Lesser GNU General Public License     *
    * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
    *                                                                              *
    ********************************************************************************/
   
   /********************************************************************************
    *                                                                              *
    * This namespace provides implementations of Argument and Entity that use STL  *
    * containers for their datatypes and are not just lazy references to the       *
    * IFC-SPF file. Therefore they can be modified by the client application.      *
    *                                                                              *
    ********************************************************************************/
   
   #ifndef IFCWRITE_H
   #define IFCWRITE_H
   
   #include <boost/variant.hpp>
   #include <boost/optional.hpp>
   #include <boost/dynamic_bitset.hpp>
   
   #include <boost/utility/enable_if.hpp>
   #include <boost/type_traits/is_base_of.hpp>
   #include <boost/type_traits/remove_pointer.hpp>
   
   #include "ifc_parse_api.h"
   
   #include "../ifcparse/IfcBaseClass.h"
   #include "../ifcparse/IfcParse.h"
   
   namespace IfcWrite {
   
       class IFC_PARSE_API IfcWriteArgument : public Argument {
       public:
           class EnumerationReference {
           public:
               int data;
               const char* enumeration_value;
               EnumerationReference(int data, const char* enumeration_value)
                   : data(data), enumeration_value(enumeration_value) {}
           };      
           class Derived {};
           class empty_aggregate_t {};
           class empty_aggregate_of_aggregate_t {};
       private:
           boost::variant<
               // A null argument, it will always serialize to $
               boost::blank,
               // A derived argument, it will always serialize to *
               Derived,
               // An integer argument, e.g. 123 
   
               // SCALARS:
               int, 
               // A boolean argument, it will serialize to either .T. or .F.
               bool, 
               // A floating point argument, e.g. 12.3
               double,
               // A character string argument, e.g. 'IfcOpenShell'
               std::string,
               // A binary argument, e.g. "092A" -> 100100101010
               boost::dynamic_bitset<>,
               // An enumeration argument, e.g. .USERDEFINED. 
               // To initialize the argument a string representation
               // has to be explicitly passed of the enumeration value
               // which is stored internally as an integer. The argument
               // itself does not keep track of what schema enumeration
               // type is represented.
               EnumerationReference,
               // An entity instance argument. It will either serialize to
               // e.g. #123 or datatype identifier for simple types, e.g. 
               // IFCREAL(12.3)
               IfcUtil::IfcBaseClass*,
   
               // AGGREGATES:
               empty_aggregate_t,
               // An aggregate of integers, e.g. (1,2,3)
               std::vector<int>,
               // An aggregate of floats, e.g. (12.3,4.) 
               std::vector<double>,
               // An aggregate of strings, e.g. ('Ifc','Open','Shell')
               std::vector<std::string>,
               // An aggregate of binaries, e.g. ("23B", "092A") -> (111011, 100100101010)
               std::vector<boost::dynamic_bitset<> >,
               // An aggregate of entity instances. It will either serialize to
               // e.g. (#1,#2,#3) or datatype identifier for simple types,
               // e.g. (IFCREAL(1.2),IFCINTEGER(3.))
               IfcEntityList::ptr,
   
               // AGGREGATES OF AGGREGATES:
               empty_aggregate_of_aggregate_t,
               // An aggregate of an aggregate of ints. E.g. ((1, 2), (3))
               std::vector< std::vector<int> >,
               // An aggregate of an aggregate of floats. E.g. ((1., 2.3), (4.))
               std::vector< std::vector<double> >,
               // An aggregate of an aggregate of entities. E.g. ((#1, #2), (#3))
               IfcEntityListList::ptr
           > container;
       public:
   
           template <typename T>
           const T& as() const {
               if (const T* val = boost::get<T>(&container)) {
                   return *val;
               } else {
                   throw IfcParse::IfcException("Invalid cast");
               }
           }
   
           template <typename T>
           typename boost::disable_if<boost::is_base_of<IfcUtil::IfcBaseClass, typename boost::remove_pointer<T>::type>, void>::type
           set(const T& t) {
               container = t;
           }
   
           // Overload to detect null values
           void set(const IfcEntityList::ptr& v);
   
           // Overload to detect null values
           void set(const IfcEntityListList::ptr& v);
   
           // Overload to detect null values
           void set(IfcUtil::IfcBaseClass*const & v);
           
           operator int() const;
           operator bool() const;
           operator double() const;
           operator std::string() const;
           operator boost::dynamic_bitset<>() const;
           operator IfcUtil::IfcBaseClass*() const;
   
           operator std::vector<int>() const;
           operator std::vector<double>() const;
           operator std::vector<std::string>() const;
           operator std::vector<boost::dynamic_bitset<> >() const;
           operator IfcEntityList::ptr() const;
   
           operator std::vector< std::vector<int> >() const;
           operator std::vector< std::vector<double> >() const;
           operator IfcEntityListList::ptr() const;
   
           bool isNull() const;
           Argument* operator [] (unsigned int i) const;
           std::string toString(bool upper=false) const;
           unsigned int size() const;
           IfcUtil::ArgumentType type() const;
       };
   
   }
   
   
   #endif