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/* Copyright 2013 10gen Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects
* for all of the code used other than as permitted herein. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you do not
* wish to do so, delete this exception statement from your version. If you
* delete this exception statement from all source files in the program,
* then also delete it in the license file.
*/
#pragma once
// We need to drag in a C++ header so we can examine __GXX_EXPERIMENTAL_CXX0X__ or
// _LIBCPP_VERSION meaningfully. The <new> header is pretty lightweight, mostly unavoidable,
// and almost certain to bring in the standard library configuration macros.
#include <new>
// NOTE(acm): Before gcc-4.7, __cplusplus is always defined to be 1, so we can't reliably
// detect C++11 support by exclusively checking the value of __cplusplus. Additionaly, libc++,
// whether in C++11 or C++03 mode, doesn't use TR1 and drops things into std instead.
#if __cplusplus >= 201103L || defined(__GXX_EXPERIMENTAL_CXX0X__) || defined(_LIBCPP_VERSION)
#include <functional>
#define MONGO_HASH_NAMESPACE_START namespace std {
#define MONGO_HASH_NAMESPACE_END }
#define MONGO_HASH_NAMESPACE std
#elif defined(_MSC_VER) && _MSC_VER >= 1500
#if _MSC_VER >= 1600 /* Visual Studio 2010+ */
#include <functional>
#define MONGO_HASH_NAMESPACE_START namespace std {
#define MONGO_HASH_NAMESPACE_END }
#define MONGO_HASH_NAMESPACE std
#else /* Older Visual Studio */
#include <tr1/functional>
#define MONGO_HASH_NAMESPACE_START namespace std { namespace tr1 {
#define MONGO_HASH_NAMESPACE_END }}
#define MONGO_HASH_NAMESPACE std::tr1
#endif
#elif defined(__GNUC__)
#include <tr1/functional>
#define MONGO_HASH_NAMESPACE_START namespace std { namespace tr1 {
#define MONGO_HASH_NAMESPACE_END }}
#define MONGO_HASH_NAMESPACE std::tr1
#else
#error "Cannot determine namespace for 'hash'"
#endif
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