MongoDB C++ Driver current
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single_context.hpp
1// Copyright 2014 MongoDB Inc.
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7// http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15#pragma once
16
17#include <bsoncxx/builder/core.hpp>
18#include <bsoncxx/builder/stream/array_context.hpp>
19#include <bsoncxx/builder/stream/key_context.hpp>
20#include <bsoncxx/builder/stream/value_context.hpp>
21
22#include <bsoncxx/config/prelude.hpp>
23
24namespace bsoncxx {
25inline namespace v_noabi {
26namespace builder {
27namespace stream {
28
37 public:
44 BSONCXX_INLINE single_context(core* core) : _core(core) {}
45
52 _core->open_document();
53
54 return wrap_document();
55 }
56
62 BSONCXX_INLINE array_context<> operator<<(open_array_type) {
63 _core->open_array();
64
65 return wrap_array();
66 }
67
75 template <class T>
76 BSONCXX_INLINE void operator<<(T&& t) {
77 _core->append(std::forward<T>(t));
78 }
79
80 private:
81 BSONCXX_INLINE array_context<> wrap_array() {
82 return array_context<>(_core);
83 }
84
85 BSONCXX_INLINE key_context<> wrap_document() {
86 return key_context<>(_core);
87 }
88
89 core* _core;
90};
91
95template <class T>
97 return single_context(_core);
98}
99
103template <class T>
105 return single_context(_core);
106}
107
108} // namespace stream
109} // namespace builder
110} // namespace v_noabi
111} // namespace bsoncxx
112
113#include <bsoncxx/config/postlude.hpp>
A low-level interface for constructing BSON documents and arrays.
Definition core.hpp:43
core & append(const types::b_double &value)
Appends a BSON double.
core & open_document()
Opens a sub-document within this BSON datum.
core & open_array()
Opens a sub-array within this BSON datum.
A stream context which expects any number of values.
Definition array_context.hpp:52
A stream context which expects a key, which can later be followed by value, then more key/value pairs...
Definition key_context.hpp:49
A stream context which appends a single value.
Definition single_context.hpp:36
key_context operator<<(open_document_type)
<< operator for opening a new subdocument in the core builder.
Definition single_context.hpp:51
void operator<<(T &&t)
<< operator for accepting a real value and appending it to the core builder.
Definition single_context.hpp:76
A stream context which expects a value, which can later be followed by more key/value pairs.
Definition value_context.hpp:48
The top-level namespace for bsoncxx library entities.
Definition element.hpp:24
The type of a stream manipulator to open a subdocument.
Definition helpers.hpp:32