string_view.hpp

// Copyright 2015 MongoDB Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License 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 <bsoncxx/config/prelude.hpp>
 
#if defined(BSONCXX_POLY_USE_MNMLSTC)
 
#include <core/string.hpp>
 
namespace bsoncxx {
inline namespace v_noabi {
namespace stdx {
 
using ::core::basic_string_view;
using ::core::string_view;
 
}  // namespace stdx
}  // namespace v_noabi
}  // namespace bsoncxx
 
#elif defined(BSONCXX_POLY_USE_BOOST)
 
#include <boost/version.hpp>
 
#if BOOST_VERSION >= 106100
 
#include <boost/utility/string_view.hpp>
 
namespace bsoncxx {
inline namespace v_noabi {
namespace stdx {
 
using ::boost::basic_string_view;
using ::boost::string_view;
 
}  // namespace stdx
}  // namespace v_noabi
}  // namespace bsoncxx
 
#else
 
#include <boost/utility/string_ref.hpp>
 
namespace bsoncxx {
inline namespace v_noabi {
namespace stdx {
 
template <typename charT, typename traits = std::char_traits<charT>>
using basic_string_view = ::boost::basic_string_ref<charT, traits>;
using string_view = ::boost::string_ref;
 
}  // namespace stdx
}  // namespace v_noabi
}  // namespace bsoncxx
 
#endif
 
#elif defined(BSONCXX_POLY_USE_STD_EXPERIMENTAL)
 
#include <experimental/string_view>
 
namespace bsoncxx {
inline namespace v_noabi {
namespace stdx {
 
using ::std::experimental::basic_string_view;
using ::std::experimental::string_view;
 
}  // namespace stdx
}  // namespace v_noabi
}  // namespace bsoncxx
 
#elif defined(BSONCXX_POLY_USE_STD)
 
#include <string_view>
 
namespace bsoncxx {
inline namespace v_noabi {
namespace stdx {
 
using ::std::basic_string_view;
using ::std::string_view;
 
}  // namespace stdx
}  // namespace v_noabi
}  // namespace bsoncxx
 
#else
#error "Cannot find a valid polyfill for string_view"
#endif
 
#include <bsoncxx/config/postlude.hpp>