src/base/bind_internal_functor.h.pump

$$ This is a pump file for generating file templates.  Pump is a python
$$ script that is part of the Google Test suite of utilities.  Description
$$ can be found here:
$$
$$ http://code.google.com/p/googletest/wiki/PumpManual
$$

$$ See comment for MAX_ARITY in base/bind.h.pump.
$var MAX_ARITY = 7
$range ARITY 0..MAX_ARITY

// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef BASE_BIND_INTERNAL_FUNCTOR_H_
#define BASE_BIND_INTERNAL_FUNCTOR_H_

namespace base {
namespace internal {

// The RunnableAdapterFunctor<> template is used in a template specialization
// for RunnableAdapter<> which enables support for functor objects, including
// C++11 lambdas. The functor signature is deduced from the type of the
// operator() method using decltype().
//
// All supported functors are assumed to have a const qualifier in their
// operator() method.

template <typename Functor>
class RunnableAdapter;

template <typename Functor, typename Sig>
class RunnableAdapterFunctor;

template <typename Functor>
class RunnableAdapter
    : public RunnableAdapterFunctor<Functor, decltype(&Functor::operator())> {
 public:
  typedef RunnableAdapterFunctor<Functor,
      decltype(&Functor::operator())> BaseType;

  explicit RunnableAdapter(Functor functor)
      : BaseType(functor) {}
};

$for ARITY [[
$range ARG 1..ARITY

// Functor: Arity $(ARITY).
template <typename F, typename T, typename R[[]]
$if ARITY > 0[[, ]] $for ARG , [[typename A$(ARG)]]>
class RunnableAdapterFunctor<F, R(T::*)($for ARG , [[A$(ARG)]]) const> {
 public:
  typedef R (RunType)($for ARG , [[A$(ARG)]]);

  explicit RunnableAdapterFunctor(F functor)
      : functor_(functor) {
  }

  R Run($for ARG , [[typename CallbackParamTraits<A$(ARG)>::ForwardType a$(ARG)]]) {
    return functor_($for ARG , [[CallbackForward(a$(ARG))]]);
  }

 private:
  F functor_;
};

]]  $$ for ARITY

}  // namespace internal
}  // namespace base

#endif  // BASE_BIND_INTERNAL_FUNCTOR_H_