function.h

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/******************************************************************************
The MIT License(MIT)
 
Embedded Template Library.
https://github.com/ETLCPP/etl
https://www.etlcpp.com
 
Copyright(c) 2014 John Wellbelove
 
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.
******************************************************************************/
 
#ifndef ETL_FUNCTION_INCLUDED
#define ETL_FUNCTION_INCLUDED
 
#include "platform.h"
 
//*****************************************************************************
//*****************************************************************************
 
namespace etl
{
  //***************************************************************************
  //***************************************************************************
  template <typename TParameter>
  class ifunction
  {
  public:
 
    typedef TParameter parameter_type; 
 
    virtual ~ifunction() {}
 
    //*************************************************************************
    //*************************************************************************
    virtual void operator()(TParameter) const = 0;
  };
 
  //***************************************************************************
  //***************************************************************************
  template <>
  class ifunction<void>
  {
  public:
 
    typedef void parameter_type; 
 
    virtual ~ifunction() {}
 
    //*************************************************************************
    //*************************************************************************
    virtual void operator()() const = 0;
  };
 
  //***************************************************************************
  //***************************************************************************
  template <typename TObject, typename TParameter>
  class function : public ifunction<TParameter>
  {
  public:
 
    typedef TObject    object_type;    
    typedef TParameter parameter_type; 
 
    //*************************************************************************
    //*************************************************************************
    function(TObject& object_, void (TObject::*p_function_)(TParameter))
      : p_object(&object_)
      , p_function(p_function_)
    {
    }
 
    //*************************************************************************
    //*************************************************************************
    virtual void operator()(TParameter data) const ETL_OVERRIDE
    {
      // Call the object's member function with the data.
      (p_object->*p_function)(data);
    }
 
  private:
 
    TObject* p_object;                       
    void (TObject::*p_function)(TParameter); 
  };
 
  //***************************************************************************
  //***************************************************************************
  template <typename TObject>
  class function<TObject, void> : public ifunction<void>
  {
  public:
 
    //*************************************************************************
    //*************************************************************************
    function(TObject& object_, void (TObject::*p_function_)(void))
      : p_object(&object_)
      , p_function(p_function_)
    {
    }
 
    //*************************************************************************
    //*************************************************************************
    virtual void operator()() const ETL_OVERRIDE
    {
      // Call the object's member function.
      (p_object->*p_function)();
    }
 
  private:
 
    TObject* p_object;             
    void (TObject::*p_function)(); 
  };
 
  //***************************************************************************
  //***************************************************************************
  template <typename TParameter>
  class function<void, TParameter> : public ifunction<TParameter>
  {
  public:
 
    //*************************************************************************
    //*************************************************************************
    explicit function(void (*p_function_)(TParameter))
      : p_function(p_function_)
    {
    }
 
    //*************************************************************************
    //*************************************************************************
    virtual void operator()(TParameter data) const ETL_OVERRIDE
    {
      // Call the function with the data.
      (*p_function)(data);
    }
 
  private:
 
    void (*p_function)(TParameter); 
  };
 
  //***************************************************************************
  //***************************************************************************
  template <>
  class function<void, void> : public ifunction<void>
  {
  public:
 
    //*************************************************************************
    //*************************************************************************
    explicit function(void (*p_function_)(void))
      : p_function(p_function_)
    {
    }
 
    //*************************************************************************
    //*************************************************************************
    virtual void operator()() const ETL_OVERRIDE
    {
      // Call the function.
      (*p_function)();
    }
 
  private:
 
    void (*p_function)(); 
  };
 
  //***************************************************************************
  //***************************************************************************
  template <typename TObject, typename TParameter, void (TObject::*Function)(TParameter)>
  class function_mp : public ifunction<TParameter>
  {
  public:
 
    typedef TObject    object_type;    
    typedef TParameter parameter_type; 
 
    //*************************************************************************
    //*************************************************************************
    explicit function_mp(TObject& object_)
      : p_object(&object_)
    {
    }
 
    //*************************************************************************
    //*************************************************************************
    virtual void operator()(TParameter data) const ETL_OVERRIDE
    {
      // Call the object's member function with the data.
      (p_object->*Function)(data);
    }
 
  private:
 
    TObject* p_object; 
  };
 
  //***************************************************************************
  //***************************************************************************
  template <typename TObject, void (TObject::*Function)(void)>
  class function_mv : public ifunction<void>
  {
  public:
 
    typedef TObject object_type;    
    typedef void    parameter_type; 
 
    //*************************************************************************
    //*************************************************************************
    explicit function_mv(TObject& object_)
      : p_object(&object_)
    {
    }
 
    //*************************************************************************
    //*************************************************************************
    virtual void operator()() const ETL_OVERRIDE
    {
      // Call the object's member function.
      (p_object->*Function)();
    }
 
  private:
 
    TObject* p_object; 
  };
 
  //***************************************************************************
  //***************************************************************************
  template <typename TObject, typename TParameter, TObject& Instance, void (TObject::*Function)(TParameter)>
  class function_imp : public ifunction<TParameter>
  {
  public:
 
    typedef TObject    object_type;    
    typedef TParameter parameter_type; 
 
    //*************************************************************************
    //*************************************************************************
    virtual void operator()(TParameter data) const ETL_OVERRIDE
    {
      // Call the object's member function with the data.
      (Instance.*Function)(data);
    }
  };
 
  //***************************************************************************
  //***************************************************************************
  template <typename TObject, TObject& Instance, void (TObject::*Function)(void)>
  class function_imv : public ifunction<void>
  {
  public:
 
    typedef TObject object_type;    
    typedef void    parameter_type; 
 
    //*************************************************************************
    //*************************************************************************
    virtual void operator()() const ETL_OVERRIDE
    {
      // Call the object's member function.
      (Instance.*Function)();
    }
  };
 
  //***************************************************************************
  //***************************************************************************
  template <typename TParameter, void (*Function)(TParameter)>
  class function_fp : public ifunction<TParameter>
  {
  public:
 
    typedef TParameter parameter_type; 
 
    //*************************************************************************
    //*************************************************************************
    function_fp() {}
 
    //*************************************************************************
    //*************************************************************************
    virtual void operator()(TParameter data) const ETL_OVERRIDE
    {
      // Call the object's member function with the data.
      (*Function)(data);
    }
  };
 
  //***************************************************************************
  //***************************************************************************
  template <void (*Function)(void)>
  class function_fv : public ifunction<void>
  {
  public:
 
    typedef void parameter_type; 
 
    //*************************************************************************
    //*************************************************************************
    function_fv() {}
 
    //*************************************************************************
    //*************************************************************************
    virtual void operator()() const ETL_OVERRIDE
    {
      // Call the function.
      (*Function)();
    }
  };
 
} // namespace etl
 
#endif