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#ifndef PROTON_ANNOTATION_KEY_HPP
#define PROTON_ANNOTATION_KEY_HPP
/*
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*
*/
#include "./scalar_base.hpp"
#include "./symbol.hpp"
#include <proton/type_compat.h>
/// @file
/// @copybrief proton::annotation_key
namespace proton {
/// A key for use with AMQP annotation maps.
///
/// An annotation_key can contain either a uint64_t or a proton::symbol.
class annotation_key : public scalar_base {
public:
/// An empty annotation key.
annotation_key() = default;
/// Construct from any type that can be assigned.
template <class T> annotation_key(const T& x) { *this = x; }
/// @name Assign from a uint64_t or symbol.
/// @{
annotation_key& operator=(uint64_t x) { put_(x); return *this; }
annotation_key& operator=(const symbol& x) { put_(x); return *this; }
/// @}
/// @name Extra conversions for strings, treated as codec::SYMBOL.
/// @{
annotation_key& operator=(const std::string& x) { put_(symbol(x)); return *this; }
annotation_key& operator=(const char *x) { put_(symbol(x)); return *this; }
/// @}
/// @cond INTERNAL
friend class message;
friend class codec::decoder;
/// @endcond
};
/// @cond INTERNAL
/// Primary template for get<T>(message_id), specialized for legal types.
template <class T> T get(const annotation_key& x);
/// @endcond
/// Get the uint64_t value or throw conversion_error.
///
/// @relatedalso annotation_key
template<> inline uint64_t get<uint64_t>(const annotation_key& x) { return internal::get<uint64_t>(x); }
/// Get the @ref symbol value or throw conversion_error.
///
/// @relatedalso annotation_key
template<> inline symbol get<symbol>(const annotation_key& x) { return internal::get<symbol>(x); }
/// Get the @ref binary value or throw conversion_error.
///
/// @copydoc scalar::coerce
/// @relatedalso annotation_key
template<class T> T coerce(const annotation_key& x) { return internal::coerce<T>(x); }
} // proton
#endif // PROTON_ANNOTATION_KEY_HPP
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