MongoDB C++ Driver  mongocxx-3.1.0
sub_array.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/basic/helpers.hpp>
18 #include <bsoncxx/builder/concatenate.hpp>
19 #include <bsoncxx/builder/core.hpp>
20 
21 #include <bsoncxx/config/prelude.hpp>
22 
23 namespace bsoncxx {
24 BSONCXX_INLINE_NAMESPACE_BEGIN
25 namespace builder {
26 namespace basic {
27 
28 namespace impl {
29 
30 template <typename T>
31 void value_append(core* core, T&& t);
32 
33 } // namespace impl
34 
39 class sub_array {
40  public:
44  BSONCXX_INLINE sub_array(core* core) : _core(core) {
45  }
46 
50  template <typename Arg, typename... Args>
51  BSONCXX_INLINE void append(Arg&& a, Args&&... args) {
52  append_(std::forward<Arg>(a));
53  append(std::forward<Args>(args)...);
54  }
55 
59  BSONCXX_INLINE
60  void append() {
61  }
62 
63  private:
64  //
65  // Appends a BSON value.
66  //
67  template <typename T>
68  BSONCXX_INLINE void append_(T&& t) {
69  impl::value_append(_core, std::forward<T>(t));
70  }
71 
72  //
73  // Concatenates another bson array directly.
74  //
75  BSONCXX_INLINE
76  void append_(concatenate_array array) {
77  _core->concatenate(array.view());
78  }
79 
80  core* _core;
81 };
82 
83 } // namespace basic
84 } // namespace builder
85 BSONCXX_INLINE_NAMESPACE_END
86 } // namespace bsoncxx
87 
88 #include <bsoncxx/config/postlude.hpp>
array::view view() const
Accessor that provides a view of the wrapped concatenate array.
Definition: concatenate.hpp:85
A low-level interface for constructing BSON documents and arrays.
Definition: core.hpp:42
An internal class of builder::basic.
Definition: sub_array.hpp:39
void append(Arg &&a, Args &&...args)
Appends multiple BSON values.
Definition: sub_array.hpp:51
sub_array(core *core)
Default constructor.
Definition: sub_array.hpp:44
void append()
Inductive base-case for the variadic append(...)
Definition: sub_array.hpp:60
Container to concatenate an array.
Definition: concatenate.hpp:62
void concatenate(const document::view &view)
Appends the keys from a BSON document into this BSON datum.
Definition: element.hpp:24