Qpid Proton C++ API 0.39.0
 
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scalar.hpp
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1#ifndef PROTON_SCALAR_HPP
2#define PROTON_SCALAR_HPP
3
4/*
5 * Licensed to the Apache Software Foundation (ASF) under one
6 * or more contributor license agreements. See the NOTICE file
7 * distributed with this work for additional information
8 * regarding copyright ownership. The ASF licenses this file
9 * to you under the Apache License, Version 2.0 (the
10 * "License"); you may not use this file except in compliance
11 * with the License. You may obtain a copy of the License at
12 *
13 * http://www.apache.org/licenses/LICENSE-2.0
14 *
15 * Unless required by applicable law or agreed to in writing,
16 * software distributed under the License is distributed on an
17 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
18 * KIND, either express or implied. See the License for the
19 * specific language governing permissions and limitations
20 * under the License.
21 */
22
23#include "./scalar_base.hpp"
24
25#include "proton/null.hpp"
26
27#include <proton/type_compat.h>
28
31
32namespace proton {
33
37class scalar : public scalar_base {
38 public:
40 PN_CPP_EXTERN scalar() = default;
41
43 template <class T> scalar(const T& x) { *this = x; }
44
46 template <class T> scalar& operator=(const T& x) { put(x); return *this; }
47
49 void clear() { *this = null(); }
50};
51
60template<class T> T get(const scalar& s) { return internal::get<T>(s); }
61
72template<class T> T coerce(const scalar& x) { return internal::coerce<T>(x); }
73
74
85template<class T> T coerce(scalar& x) { return internal::coerce<T>(x); }
86
87} // proton
88
89#endif // PROTON_SCALAR_HPP
The type of the AMQP null value.
Definition: null.hpp:38
The base class for scalar types.
Definition: scalar_base.hpp:60
A holder for an instance of any scalar AMQP type.
Definition: scalar.hpp:37
scalar(const T &x)
Construct from any scalar type.
Definition: scalar.hpp:43
T coerce(scalar &x)
Coerce the contained value to type T.
Definition: scalar.hpp:85
scalar & operator=(const T &x)
Assign from any scalar type.
Definition: scalar.hpp:46
T coerce(const scalar &x)
Coerce the contained value to type T.
Definition: scalar.hpp:72
T get(const scalar &s)
Get a contained value of type T.
Definition: scalar.hpp:60
scalar()=default
Create an empty scalar.
void clear()
Clear the scalar, making it empty().
Definition: scalar.hpp:49
The main Proton namespace.
Definition: annotation_key.hpp:33
The type of the AMQP null value.
The base class for scalar types.