9dae112952
Co-authored-by: wxhwang <wxhwang@126.com> Co-authored-by: godyangfight <godyangfight@gmail.com> Co-authored-by: Tyshawn <tuyunshan@gmail.com>
63 lines
2.8 KiB
C++
63 lines
2.8 KiB
C++
/**
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* Copyright (c) 2021 OceanBase
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* OceanBase CE is licensed under Mulan PubL v2.
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* You can use this software according to the terms and conditions of the Mulan PubL v2.
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* You may obtain a copy of Mulan PubL v2 at:
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* http://license.coscl.org.cn/MulanPubL-2.0
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* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
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* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
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* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
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* See the Mulan PubL v2 for more details.
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*/
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#ifndef OCEANBASE_SHARE_OB_DELEGATE_
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#define OCEANBASE_SHARE_OB_DELEGATE_
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#include <type_traits>
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// this one need put the define of delegate_obj before delegate of function.
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#define DELEGATE(delegate_obj, func_name) \
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template <typename ...Args> \
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auto func_name(Args &&...args) \
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->decltype(delegate_obj.func_name(std::forward<Args>(args)...)) { \
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return delegate_obj.func_name(std::forward<Args>(args)...); \
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}
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#define CONST_DELEGATE(delegate_obj, func_name) \
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template <typename ...Args> \
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auto func_name(Args &&...args) \
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->decltype(delegate_obj.func_name(std::forward<Args>(args)...)) const { \
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return delegate_obj.func_name(std::forward<Args>(args)...); \
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}
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#define DELEGATE_WITH_RET(delegate_obj, func_name, ret) \
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template <typename ...Args> \
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ret func_name(Args &&...args) { \
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return delegate_obj.func_name(std::forward<Args>(args)...); \
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}
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#define DELEGATE_PTR_WITH_RET(delegate_obj, func_name, ret) \
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template <typename ...Args> \
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ret func_name(Args &&...args) { \
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return delegate_obj->func_name(std::forward<Args>(args)...); \
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}
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#define DELEGATE_PTR_WITH_CHECK(delegate_obj, func_name) \
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template <typename ...Args> \
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int func_name(Args &&...args) { \
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int ret = OB_SUCCESS; \
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if (nullptr == delegate_obj) { \
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ret = OB_NOT_INIT; \
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} else { \
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ret = delegate_obj->func_name(std::forward<Args>(args)...); \
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} \
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return ret; \
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}
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#define CONST_DELEGATE_WITH_RET(delegate_obj, func_name, ret) \
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template <typename ...Args> \
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ret func_name(Args &&...args) const { \
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return delegate_obj.func_name(std::forward<Args>(args)...); \
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}
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#endif
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