iceoryx_doc
1.0.1
iceoryx_utils
cxx
attributes.hpp
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// Copyright (c) 2021 by Apex.AI Inc. All rights reserved.
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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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// SPDX-License-Identifier: Apache-2.0
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#ifndef IOX_UTILS_CXX_ATTRIBUTES_HPP
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#define IOX_UTILS_CXX_ATTRIBUTES_HPP
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namespace
iox
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{
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namespace
cxx
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{
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#define IOX_DISCARD_RESULT(expr) static_cast<void>(expr)
// NOLINT
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// [[nodiscard]], [[gnu::warn_unused]] supported since gcc 4.8 (https://gcc.gnu.org/projects/cxx-status.html)
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#if (defined(__GNUC__) && __GNUC__ >= 5) || (defined(__clang__) && __clang_major >= 4)
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#define IOX_NO_DISCARD [[nodiscard, gnu::warn_unused]]
// NOLINT
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#else
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// On WIN32 we are using C++17 which makes the keyword [[nodiscard]] available
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#if defined(_WIN32)
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#define IOX_NO_DISCARD [[nodiscard]]
// NOLINT
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// on an unknown platform we use for now nothing since we do not know what is supported there
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#else
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#define IOX_NO_DISCARD
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#endif
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#endif
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// [[fallthrough]] supported since gcc 7 (https://gcc.gnu.org/projects/cxx-status.html)
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#if (defined(__GNUC__) && __GNUC__ >= 7) || (defined(__clang__) && __clang_major >= 4)
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#define IOX_FALLTHROUGH [[fallthrough]]
// NOLINT
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#else
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// On WIN32 we are using C++17 which makes the keyword [[fallthrough]] available
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#if defined(_WIN32)
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#define IOX_FALLTHROUGH [[fallthrough]]
// NOLINT
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// on an unknown platform we use for now nothing since we do not know what is supported there
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#else
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#define IOX_FALLTHROUGH
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#endif
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#endif
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#if defined(__GNUC__) || defined(__clang__)
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#define IOX_MAYBE_UNUSED [[gnu::unused]]
// NOLINT
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#else
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// On WIN32 we are using C++17 which makes the attribute [[maybe_unused]] available
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#if defined(_WIN32)
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#define IOX_MAYBE_UNUSED [[maybe_unused]]
// NOLINT
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// on an unknown platform we use for now nothing since we do not know what is supported there
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#else
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#define IOX_MAYBE_UNUSED
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#endif
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#endif
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}
// namespace cxx
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}
// namespace iox
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#endif
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iox
building block to easily create free function for logging in a library context
Definition:
lockfree_queue.hpp:28
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