Ditto/chaiscript/dispatchkit/bind_first.hpp

// This file is distributed under the BSD License.
// See "license.txt" for details.
// Copyright 2009-2012, Jonathan Turner ([email protected])
// Copyright 2009-2017, Jason Turner ([email protected])
// http://www.chaiscript.com

// This is an open source non-commercial project. Dear PVS-Studio, please check it.
// PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com


#ifndef CHAISCRIPT_BIND_FIRST_HPP_
#define CHAISCRIPT_BIND_FIRST_HPP_

#include <functional>

namespace chaiscript
{
  namespace detail
  {

    template<typename T>
      T* get_pointer(T *t)
      {
        return t;
      }

    template<typename T>
      T* get_pointer(const std::reference_wrapper<T> &t)
      {
        return &t.get();
      }

    template<typename O, typename Ret, typename P1, typename ... Param>
      auto bind_first(Ret (*f)(P1, Param...), O&& o)
      {
        return [f, o](Param...param) -> Ret {
          return f(std::forward<O>(o), std::forward<Param>(param)...);
        };
      }

    template<typename O, typename Ret, typename Class, typename ... Param>
      auto bind_first(Ret (Class::*f)(Param...), O&& o)
      {
        return [f, o](Param...param) -> Ret {
          return (get_pointer(o)->*f)(std::forward<Param>(param)...);
        };
      }

    template<typename O, typename Ret, typename Class, typename ... Param>
      auto bind_first(Ret (Class::*f)(Param...) const, O&& o)
      {
        return [f, o](Param...param) -> Ret {
          return (get_pointer(o)->*f)(std::forward<Param>(param)...);
        };

      }

    template<typename O, typename Ret, typename P1, typename ... Param>
      auto bind_first(const std::function<Ret (P1, Param...)> &f, O&& o)
      {
        return [f, o](Param...param) -> Ret {
          return f(o, std::forward<Param>(param)...);
        };
      }

    template<typename F, typename O, typename Ret, typename Class, typename P1, typename ... Param>
      auto bind_first(const F &fo, O&& o, Ret (Class::*f)(P1, Param...) const)
      {
        return [fo, o, f](Param ...param) -> Ret {
          return (fo.*f)(o, std::forward<Param>(param)...);
        };

      }

    template<typename F, typename O>
      auto bind_first(const F &f, O&& o)
      {
        return bind_first(f, std::forward<O>(o), &F::operator());
      }

  }
}


#endif