Brendan LE GLAUNEC
66 lines
1.6 KiB
C++
66 lines
1.6 KiB
C++
// Copyright 2016 Etix Labs
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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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namespace etix {
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namespace cameradar {
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namespace mysql {
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enum class execute_result { success, not_found, no_row_updated, sql_error, error };
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//! Wrapper of a DB query result
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//! Templated on the data type we want to return (list<model>, bool, whatever)
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template <typename DataType>
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struct query_result {
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DataType data;
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execute_result state;
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std::string error_msg;
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inline bool
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success(void) const {
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return state == execute_result::success;
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}
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inline bool
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error(void) const {
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return not success();
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}
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};
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//! Empty query result for when we just want to return the status
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//! of the request with no associated data
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template <>
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struct query_result<void> {
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execute_result state;
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std::string error_msg;
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inline bool
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success(void) const {
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return state == execute_result::success;
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}
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inline bool
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error(void) const {
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return not success();
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}
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};
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typedef query_result<void> empty_result;
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} //! mysql
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} //! cameradar
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} //! etix
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