mirror of https://gitee.com/bigwinds/arangodb
78 lines
2.0 KiB
C++
78 lines
2.0 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// DISCLAIMER
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///
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/// Copyright 2014-2016 ArangoDB GmbH, Cologne, Germany
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/// Copyright 2004-2014 triAGENS GmbH, Cologne, Germany
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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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///
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/// Copyright holder is ArangoDB GmbH, Cologne, Germany
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///
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/// @author Jan Steemann
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////////////////////////////////////////////////////////////////////////////////
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#ifndef ARANGOD_AQL_NODE_FINDER_H
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#define ARANGOD_AQL_NODE_FINDER_H 1
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#include "Basics/Common.h"
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#include "Aql/ExecutionNode.h"
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#include "Aql/WalkerWorker.h"
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#include "Basics/SmallVector.h"
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namespace arangodb {
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namespace aql {
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template <typename T>
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class NodeFinder final : public WalkerWorker<ExecutionNode> {
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T _lookingFor;
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SmallVector<ExecutionNode*>& _out;
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bool _enterSubqueries;
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public:
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NodeFinder(T, SmallVector<ExecutionNode*>&, bool);
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bool before(ExecutionNode*) override final;
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bool enterSubquery(ExecutionNode*, ExecutionNode*) override final {
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return _enterSubqueries;
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}
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};
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class EndNodeFinder final : public WalkerWorker<ExecutionNode> {
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SmallVector<ExecutionNode*>& _out;
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std::vector<bool> _found;
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bool _enterSubqueries;
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public:
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EndNodeFinder(SmallVector<ExecutionNode*>&, bool);
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bool before(ExecutionNode*) override final;
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bool enterSubquery(ExecutionNode*, ExecutionNode*) override final {
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_found.push_back(false);
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return _enterSubqueries;
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}
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void leaveSubquery(ExecutionNode*, ExecutionNode*) override final {
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_found.pop_back();
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}
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};
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}
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}
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#endif
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