MongoDB C++ Driver mongocxx-3.6.7
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
23namespace bsoncxx {
24BSONCXX_INLINE_NAMESPACE_BEGIN
25namespace builder {
26namespace basic {
27
28namespace impl {
29
30template <typename T>
31void value_append(core* core, T&& t);
32
33} // namespace impl
34
39class sub_array {
40 public:
44 BSONCXX_INLINE sub_array(core* core) : _core(core) {}
45
49 template <typename Arg, typename... Args>
50 BSONCXX_INLINE void append(Arg&& a, Args&&... args) {
51 append_(std::forward<Arg>(a));
52 append(std::forward<Args>(args)...);
53 }
54
58 BSONCXX_INLINE
59 void append() {}
60
61 private:
62 //
63 // Appends a BSON value.
64 //
65 template <typename T>
66 BSONCXX_INLINE void append_(T&& t) {
67 impl::value_append(_core, std::forward<T>(t));
68 }
69
70 //
71 // Concatenates another bson array directly.
72 //
73 BSONCXX_INLINE
74 void append_(concatenate_array array) {
75 _core->concatenate(array.view());
76 }
77
78 core* _core;
79};
80
81} // namespace basic
82} // namespace builder
83BSONCXX_INLINE_NAMESPACE_END
84} // namespace bsoncxx
85
86#include <bsoncxx/config/postlude.hpp>
An internal class of builder::basic.
Definition: sub_array.hpp:39
sub_array(core *core)
Default constructor.
Definition: sub_array.hpp:44
void append()
Inductive base-case for the variadic append(...)
Definition: sub_array.hpp:59
void append(Arg &&a, Args &&... args)
Appends multiple BSON values.
Definition: sub_array.hpp:50
A low-level interface for constructing BSON documents and arrays.
Definition: core.hpp:42
core & concatenate(const document::view &view)
Appends the keys from a BSON document into this BSON datum.
Top level namespace for MongoDB C++ BSON functionality.
Definition: element.hpp:24
Container to concatenate an array.
Definition: concatenate.hpp:62
array::view view() const
Accessor that provides a view of the wrapped concatenate array.
Definition: concatenate.hpp:85