AWSFunction.h

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/*
 * Copyright 2010-2015 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License").
 * You may not use this file except in compliance with the License.
 * A copy of the License is located at
 * 
 *  http://aws.amazon.com/apache2.0
 * 
 * or in the "license" file accompanying this file. This file is distributed
 * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
 * express or implied. See the License for the specific language governing
 * permissions and limitations under the License.
 */

#pragma once

#include <aws/core/Core_EXPORTS.h>

#include <aws/core/utils/memory/stl/AWSAllocator.h>
#include <functional>

#ifndef __GNUG__

namespace Aws
{

template<typename F>
std::function< F > BuildFunction(const F& f) 
{
    return std::function< F >( std::allocator_arg_t(), Aws::Allocator<void>(), f );
}

// some things, like bind results, don't implicity convert to direct function types, catch those with specializations
template<typename F>
std::function< F > BuildFunction(const std::function< F >& f) 
{
    return std::function< F >( std::allocator_arg_t(), Aws::Allocator<void>(), f );
}

template<typename F>
std::function< F > BuildFunction(std::function< F >&& f) 
{
    return std::function< F >( std::allocator_arg_t(), Aws::Allocator<void>(), f );
}

} // namespace Aws

#else // __GNUG__

namespace Aws
{

// gcc does not yet support passing allocators into functions

template<typename F>
F BuildFunction(F f)
{
    return f;
}

// some things, like bind results, don't implicity convert to direct function types, catch those with specializations
template<typename F>
std::function< F > BuildFunction(const std::function< F >& f)
{
  return std::function< F >( f );
}

template<typename F>
std::function< F > BuildFunction(std::function< F >&& f)
{
  return std::function< F >( std::move(f));
}

} // namespace Aws

#endif // __GNUG__

#define AWS_BUILD_FUNCTION(func) Aws::BuildFunction(func)
#define AWS_BUILD_TYPED_FUNCTION(func, type) Aws::BuildFunction<type>(func)