120 lines
3.0 KiB
C++
120 lines
3.0 KiB
C++
// Copyright 2014 MongoDB Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#pragma once
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#include <bsoncxx/array/value.hpp>
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#include <bsoncxx/array/view.hpp>
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#include <bsoncxx/builder/basic/impl.hpp>
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#include <bsoncxx/builder/basic/kvp.hpp>
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#include <bsoncxx/builder/basic/sub_array.hpp>
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#include <bsoncxx/builder/core.hpp>
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#include <bsoncxx/config/prelude.hpp>
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namespace bsoncxx {
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BSONCXX_INLINE_NAMESPACE_BEGIN
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namespace builder {
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namespace basic {
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///
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/// A traditional builder-style interface for constructing
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/// a BSON array.
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///
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class array : public sub_array {
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public:
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///
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/// Default constructor
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///
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BSONCXX_INLINE array() : sub_array(&_core), _core(true) {}
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///
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/// Move constructor
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///
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BSONCXX_INLINE array(array&& arr) noexcept : sub_array(&_core), _core(std::move(arr._core)) {}
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///
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/// Move assignment operator
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///
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BSONCXX_INLINE array& operator=(array&& arr) noexcept {
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_core = std::move(arr._core);
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return *this;
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}
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///
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/// @return A view of the BSON array.
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///
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BSONCXX_INLINE bsoncxx::array::view view() const {
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return _core.view_array();
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}
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///
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/// Conversion operator that provides a view of the current builder
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/// contents.
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///
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/// @return A view of the current builder contents.
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///
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BSONCXX_INLINE operator bsoncxx::array::view() const {
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return view();
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}
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///
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/// Transfer ownership of the underlying array to the caller.
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///
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/// @return An array::value with ownership of the array.
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///
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/// @warning
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/// After calling extract() it is illegal to call any methods
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/// on this class, unless it is subsequenly moved into.
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///
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BSONCXX_INLINE bsoncxx::array::value extract() {
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return _core.extract_array();
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}
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///
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/// Reset the underlying BSON to an empty array.
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///
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BSONCXX_INLINE void clear() {
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_core.clear();
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}
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private:
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core _core;
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};
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///
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/// Creates an array from a list of elements.
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///
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/// @param args
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/// A variadiac list of elements. The types of the elements can be anything that
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/// builder::basic::sub_array::append accepts.
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///
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/// @return
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/// A bsoncxx::array::value containing the elements.
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///
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template <typename... Args>
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bsoncxx::array::value BSONCXX_CALL make_array(Args&&... args) {
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basic::array array;
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array.append(std::forward<Args>(args)...);
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return array.extract();
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}
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} // namespace basic
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} // namespace builder
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BSONCXX_INLINE_NAMESPACE_END
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} // namespace bsoncxx
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#include <bsoncxx/config/postlude.hpp>
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