93 lines
3.4 KiB
C++
93 lines
3.4 KiB
C++
// Copyright (c) 2023, 2024, Oracle and/or its affiliates.
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License, version 2.0,
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// as published by the Free Software Foundation.
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//
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// This program is designed to work with certain software (including
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// but not limited to OpenSSL) that is licensed under separate terms,
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// as designated in a particular file or component or in included license
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// documentation. The authors of MySQL hereby grant you an additional
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// permission to link the program and your derivative works with the
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// separately licensed software that they have either included with
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// the program or referenced in the documentation.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License, version 2.0, for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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#ifndef MYSQL_SERIALIZATION_FIELD_WRAPPER_H
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#define MYSQL_SERIALIZATION_FIELD_WRAPPER_H
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#include "mysql/serialization/field_definition.h"
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#include "mysql/serialization/serialization_types.h"
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/// @file
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/// Experimental API header
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/// @addtogroup GroupLibsMysqlSerialization
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/// @{
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namespace mysql::serialization {
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/// @brief Wrapper for fields to hold field reference and
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/// user-defined, compile-time field size
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/// @note This is created in order to pass information about field size
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/// to the Archive
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template <typename Field_type, Field_size defined_field_size>
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class Field_wrapper {
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public:
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using value_type = Field_type;
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static constexpr Field_size value_size = defined_field_size;
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using Field_ref_type = Field_type &;
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using Field_ref_wrapper_type = std::reference_wrapper<Field_type>;
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/// @brief Constructor
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/// @param field_reference Reference to field
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Field_wrapper(Field_type &field_reference) : m_ref(field_reference) {}
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/// @brief field bare reference accessor
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/// @returns Reference to Field_type object
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Field_ref_type get() { return m_ref.get(); }
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private:
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Field_ref_wrapper_type m_ref; ///< Internal reference
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};
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/// @brief Wrapper for fields to hold field reference and defined by the
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/// user compile time size of the field
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/// @note This is created in order to pass information about field size
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/// to the Archive
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template <typename Field_type, Field_size defined_field_size>
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class Field_wrapper<const Field_type, defined_field_size> {
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public:
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using value_type = Field_type;
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static constexpr Field_size value_size = defined_field_size;
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using Field_ref_type = const Field_type &;
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using Field_ref_wrapper_type = std::reference_wrapper<const Field_type>;
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/// @brief Constructor
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/// @param field_reference Reference to field
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Field_wrapper(Field_ref_type field_reference) : m_ref(field_reference) {}
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/// @brief field bare reference accessor
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/// @returns Reference to Field_type object
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Field_ref_type get() const { return m_ref.get(); }
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private:
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Field_ref_wrapper_type m_ref; ///< Internal reference
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};
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template <typename Field_type>
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auto create_varlen_field_wrapper(Field_type &field_reference) {
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return Field_wrapper<Field_type, 0>(field_reference);
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}
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} // namespace mysql::serialization
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/// @}
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#endif // MYSQL_SERIALIZATION_FIELD_WRAPPER_H
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