text: /******************************************************************************
  The MIT License(MIT)
  
  Embedded Template Library.
  https://github.com/ETLCPP/etl
  https://www.etlcpp.com
  
  Copyright(c) 2017 jwellbelove
  
  Permission is hereby granted, free of charge, to any person obtaining a copy
  of this software and associated documentation files(the "Software"), to deal
  in the Software without restriction, including without limitation the rights
  to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
  copies of the Software, and to permit persons to whom the Software is
  furnished to do so, subject to the following conditions :
  
  The above copyright notice and this permission notice shall be included in all
  copies or substantial portions of the Software.
  
  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  SOFTWARE.
  ******************************************************************************/
  
  /*[[[cog
  import cog
  cog.outl("#if 0")
  ]]]*/
  /*[[[end]]]*/
  #error THIS HEADER IS A GENERATOR. DO NOT INCLUDE.
  /*[[[cog
  import cog
  cog.outl("#endif")
  ]]]*/
  /*[[[end]]]*/
  
  /*[[[cog
  import cog
  cog.outl("//***************************************************************************")
  cog.outl("// THIS FILE HAS BEEN AUTO GENERATED. DO NOT EDIT THIS FILE.")
  cog.outl("//***************************************************************************")
  ]]]*/
  /*[[[end]]]*/
  
  //***************************************************************************
  // To generate to header file, run this at the command line.
  // Note: You will need Python and COG installed.
  //
  // python -m cogapp -d -e -ovariant_pool.h -DNTypes=<n> variant_pool_generator.h
  // Where <n> is the number of types to support.
  //
  // e.g.
  // To generate handlers for up to 16 types...
  // python -m cogapp -d -e -ovariant_pool.h -DNTypes=16 variant_pool_generator.h
  //
  // See generate.bat
  //***************************************************************************
  
  #ifndef ETL_VARIANT_POOL_INCLUDED
  #define ETL_VARIANT_POOL_INCLUDED
  
  #include <stdint.h>
  
  #include "platform.h"
  #include "error_handler.h"
  #include "exception.h"
  #include "largest.h"
  #include "type_traits.h"
  #include "alignment.h"
  #include "static_assert.h"
  #include "type_lookup.h"
  #include "pool.h"
  
  #include "utility.h"
  
  #undef ETL_FILE
  #define ETL_FILE "40"
  
  namespace etl
  {
    //***************************************************************************
    class variant_pool_exception : public etl::exception
    {
    public:
  
      variant_pool_exception(string_type reason_, string_type file_name_, numeric_type line_number_)
        : exception(reason_, file_name_, line_number_)
      {
      }
    };
  
    //***************************************************************************
    class variant_pool_cannot_create : public etl::variant_pool_exception
    {
    public:
  
      variant_pool_cannot_create(string_type file_name_, numeric_type line_number_)
        : variant_pool_exception(ETL_ERROR_TEXT("variant_pool:cannot create", ETL_FILE"A"), file_name_, line_number_)
      {
      }
    };
  
    //***************************************************************************
    class variant_pool_did_not_create : public etl::variant_pool_exception
    {
    public:
  
      variant_pool_did_not_create(string_type file_name_, numeric_type line_number_)
        : variant_pool_exception(ETL_ERROR_TEXT("variant_pool:did not create", ETL_FILE"B"), file_name_, line_number_)
      {
      }
    };
  
    //***************************************************************************
    /*[[[cog
    import cog
    cog.outl("template <const size_t MAX_SIZE_,")
    cog.outl("          typename T1, ")
    for n in range(2, int(NTypes)):
        cog.outl("          typename T%s = void, " % n)
        if n % 16 == 0:
            cog.outl("")
            cog.out("          ")
    cog.outl("          typename T%s = void>" % int(NTypes))
    ]]]*/
    /*[[[end]]]*/
    class variant_pool
    {
    public:
  
      static const size_t MAX_SIZE = MAX_SIZE_;
  
      //*************************************************************************
      /// Default constructor.
      //*************************************************************************
      variant_pool()
      {
      }
  
  #if !ETL_CPP11_SUPPORTED || defined(ETL_STLPORT)
      //*************************************************************************
      /// Creates the object. Default constructor.
      //*************************************************************************
      template <typename T>
      T* create()
      {
        /*[[[cog
        import cog
        cog.out("ETL_STATIC_ASSERT((etl::is_one_of<T, ")
        for n in range(1, int(NTypes)):
            cog.out("T%s, " % n)
            if n % 16 == 0:
                cog.outl("")
                cog.out("                              ")
        cog.outl("T%s>::value), \"Unsupported type\");" % int(NTypes))
        ]]]*/
        /*[[[end]]]*/
  
        T* p = ETL_NULLPTR;
  
        if (pool.full())
        {
          ETL_ASSERT(false, ETL_ERROR(etl::variant_pool_cannot_create));
        }
        else
        {
          p = pool.template allocate<T>();
  
          if (p != ETL_NULLPTR)
          {
            new (p) T();
          }
        }
  
        return p;
      }
  
      //*************************************************************************
      /// Creates the object. One parameter constructor.
      //*************************************************************************
      template <typename T, typename TP1>
      T* create(const TP1& p1)
      {
        /*[[[cog
        import cog
        cog.out("ETL_STATIC_ASSERT((etl::is_one_of<T, ")
        for n in range(1, int(NTypes)):
            cog.out("T%s, " % n)
            if n % 16 == 0:
                cog.outl("")
                cog.out("                              ")
        cog.outl("T%s>::value), \"Unsupported type\");" % int(NTypes))
        ]]]*/
        /*[[[end]]]*/
  
        T* p = ETL_NULLPTR;
  
        if (pool.full())
        {
          ETL_ASSERT(false, ETL_ERROR(etl::variant_pool_cannot_create));
        }
        else
        {
          p = pool.template allocate<T>();
  
          if (p != ETL_NULLPTR)
          {
            new (p) T(p1);
          }
        }
  
        return p;
      }
  
      //*************************************************************************
      /// Creates the object. Two parameter constructor.
      //*************************************************************************
      template <typename T, typename TP1, typename TP2>
      T* create(const TP1& p1, const TP2& p2)
      {
        /*[[[cog
        import cog
        cog.out("ETL_STATIC_ASSERT((etl::is_one_of<T, ")
        for n in range(1, int(NTypes)):
            cog.out("T%s, " % n)
            if n % 16 == 0:
                cog.outl("")
                cog.out("                              ")
        cog.outl("T%s>::value), \"Unsupported type\");" % int(NTypes))
        ]]]*/
        /*[[[end]]]*/
  
        T* p = ETL_NULLPTR;
  
        if (pool.full())
        {
          ETL_ASSERT(false, ETL_ERROR(etl::variant_pool_cannot_create));
        }
        else
        {
          p = pool.template allocate<T>();
  
          if (p != ETL_NULLPTR)
          {
            new (p) T(p1, p2);
          }
        }
  
        return p;
      }
  
      //*************************************************************************
      /// Creates the object. Three parameter constructor.
      //*************************************************************************
      template <typename T, typename TP1, typename TP2, typename TP3>
      T* create(const TP1& p1, const TP2& p2, const TP3& p3)
      {
        /*[[[cog
        import cog
        cog.out("ETL_STATIC_ASSERT((etl::is_one_of<T, ")
        for n in range(1, int(NTypes)):
            cog.out("T%s, " % n)
            if n % 16 == 0:
                cog.outl("")
                cog.out("                              ")
        cog.outl("T%s>::value), \"Unsupported type\");" % int(NTypes))
        ]]]*/
        /*[[[end]]]*/
  
        T* p = ETL_NULLPTR;
  
        if (pool.full())
        {
          ETL_ASSERT(false, ETL_ERROR(etl::variant_pool_cannot_create));
        }
        else
        {
          p = pool.template allocate<T>();
  
          if (p != ETL_NULLPTR)
          {
            new (p) T(p1, p2, p3);
          }
        }
  
        return p;
      }
  
      //*************************************************************************
      /// Creates the object. Four parameter constructor.
      //*************************************************************************
      template <typename T, typename TP1, typename TP2, typename TP3, typename TP4>
      T* create(const TP1& p1, const TP2& p2, const TP3& p3, const TP4& p4)
      {
        /*[[[cog
        import cog
        cog.out("ETL_STATIC_ASSERT((etl::is_one_of<T, ")
        for n in range(1, int(NTypes)):
            cog.out("T%s, " % n)
            if n % 16 == 0:
                cog.outl("")
                cog.out("                              ")
        cog.outl("T%s>::value), \"Unsupported type\");" % int(NTypes))
        ]]]*/
        /*[[[end]]]*/
  
        T* p = ETL_NULLPTR;
  
        if (pool.full())
        {
          ETL_ASSERT(false, ETL_ERROR(etl::variant_pool_cannot_create));
        }
        else
        {
          p = pool.template allocate<T>();
  
          if (p != ETL_NULLPTR)
          {
            new (p) T(p1, p2, p3, p4);
          }
        }
  
        return p;
      }
  #else
      //*************************************************************************
      /// Creates the object from a type. Variadic parameter constructor.
      //*************************************************************************
      template <typename T, typename... Args>
      T* create(Args&&... args)
      {
        /*[[[cog
        import cog
        cog.out("ETL_STATIC_ASSERT((etl::is_one_of<T, ")
        for n in range(1, int(NTypes)):
            cog.out("T%s, " % n)
            if n % 16 == 0:
                cog.outl("")
                cog.out("                              ")
        cog.outl("T%s>::value), \"Unsupported type\");" % int(NTypes))
        ]]]*/
        /*[[[end]]]*/
  
        T* p = ETL_NULLPTR;
  
        if (pool.full())
        {
          ETL_ASSERT(false, ETL_ERROR(etl::variant_pool_cannot_create));
        }
        else
        {
          p = pool.template allocate<T>();
  
          if (p != ETL_NULLPTR)
          {
            new (p) T(ETL_OR_STD::forward<Args>(args)...);
          }
        }
  
        return p;
      }
  #endif
  
      //*************************************************************************
      /// Destroys the object.
      //*************************************************************************
      template <typename T>
      bool destroy(const T* const p)
      {
        /*[[[cog
        import cog
        cog.out("ETL_STATIC_ASSERT((etl::is_one_of<T, ")
        for n in range(1, int(NTypes)):
            cog.out("T%s, " % n)
            if n % 16 == 0:
                cog.outl("")
                cog.out("                              ")
        cog.outl("T%s>::value ||" % int(NTypes))
  
        for n in range(1, int(NTypes)):
            cog.outl("               etl::is_base_of<T, T%s>::value ||" % n)
        cog.outl("               etl::is_base_of<T, T%s>::value), \"Invalid type\");" % int(NTypes))
  
        ]]]*/
        /*[[[end]]]*/
  
        p->~T();
  
        void* vp = reinterpret_cast<char*>(const_cast<T*>(p));
  
        if (pool.is_in_pool(vp))
        {
          pool.release(vp);
          return true;
        }
        else
        {
          ETL_ASSERT(false, ETL_ERROR(variant_pool_did_not_create));
          return false;
        }
      }
  
      //*************************************************************************
      /// Returns the maximum number of items in the variant_pool.
      //*************************************************************************
      size_t max_size() const
      {
        return MAX_SIZE;
      }
  
      //*************************************************************************
      /// Returns the number of free items in the variant_pool.
      //*************************************************************************
      size_t available() const
      {
        return pool.available();
      }
  
      //*************************************************************************
      /// Returns the number of allocated items in the variant_pool.
      //*************************************************************************
      size_t size() const
      {
        return pool.size();
      }
  
      //*************************************************************************
      /// Checks to see if there are no allocated items in the variant_pool.
      /// \return <b>true</b> if there are none allocated.
      //*************************************************************************
      bool empty() const
      {
        return pool.empty();
      }
  
      //*************************************************************************
      /// Checks to see if there are no free items in the variant_pool.
      /// \return <b>true</b> if there are none free.
      //*************************************************************************
      bool full() const
      {
        return pool.full();
      }
  
    private:
  
      variant_pool(const variant_pool&);
      variant_pool& operator =(const variant_pool&);
  
      // The pool.
      /*[[[cog
      import cog
      cog.out("etl::generic_pool<etl::largest<")
      for n in range(1, int(NTypes)):
          cog.out("T%s, " % n)
          if n % 16 == 0:
              cog.outl("")
              cog.out("                  ")
      cog.outl("T%s>::size," % int(NTypes))
  
      cog.out("                  etl::largest<")
      for n in range(1, int(NTypes)):
          cog.out("T%s, " % n)
          if n % 16 == 0:
              cog.outl("")
              cog.out("                  ")
      cog.outl("T%s>::alignment," % int(NTypes))
      cog.outl("                  MAX_SIZE> pool;")
      ]]]*/
      /*[[[end]]]*/
    };
  }
  
  #undef ETL_FILE
  
  #endif
  