MongoDB C++ Driver  mongocxx-3.0.1
hint.hpp
1 // Copyright 2015 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/document/value.hpp>
18 #include <bsoncxx/document/view_or_value.hpp>
19 #include <bsoncxx/builder/stream/document.hpp>
20 #include <bsoncxx/builder/stream/helpers.hpp>
21 #include <bsoncxx/builder/stream/key_context.hpp>
22 #include <bsoncxx/stdx/optional.hpp>
23 #include <bsoncxx/string/view_or_value.hpp>
24 #include <mongocxx/stdx.hpp>
25 
26 #include <mongocxx/config/prelude.hpp>
27 
28 namespace mongocxx {
29 MONGOCXX_INLINE_NAMESPACE_BEGIN
30 
34 class MONGOCXX_API hint {
35  public:
46 
53  explicit hint(bsoncxx::string::view_or_value index);
54 
62  friend MONGOCXX_API bool MONGOCXX_CALL operator==(const hint& index_hint, std::string index);
63 
64  friend MONGOCXX_API bool MONGOCXX_CALL
65  operator==(const hint& index_hint, bsoncxx::document::view index);
69 
75  bsoncxx::document::value to_document() const;
76 
80  MONGOCXX_INLINE operator bsoncxx::document::value() const;
81 
82  private:
83  stdx::optional<bsoncxx::document::view_or_value> _index_doc;
84  stdx::optional<bsoncxx::string::view_or_value> _index_string;
85 };
86 
94 MONGOCXX_API bool MONGOCXX_CALL operator==(std::string index, const hint& index_hint);
95 
105 MONGOCXX_API bool MONGOCXX_CALL operator!=(const hint& index_hint, std::string index);
106 MONGOCXX_API bool MONGOCXX_CALL operator!=(std::string index, const hint& index_index);
110 
118 MONGOCXX_API bool MONGOCXX_CALL operator==(bsoncxx::document::view index, const hint& index_hint);
119 
130 MONGOCXX_API bool MONGOCXX_CALL operator!=(const hint& index_hint, bsoncxx::document::view index);
131 MONGOCXX_API bool MONGOCXX_CALL operator!=(bsoncxx::document::view index, const hint& index_hint);
135 
136 MONGOCXX_INLINE hint::operator bsoncxx::document::value() const {
137  return to_document();
138 }
139 
140 MONGOCXX_INLINE_NAMESPACE_END
141 } // namespace mongocxx
142 
143 #include <mongocxx/config/postlude.hpp>
Definition: bulk_write.hpp:22
A read-only BSON document that owns its underlying buffer.
Definition: value.hpp:33
A read-only, non-owning view of a BSON document.
Definition: view.hpp:33
Class representing a hint to be passed to a database operation.
Definition: hint.hpp:34
Class representing a view-or-value variant type for strings.
Definition: view_or_value.hpp:36