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4e6fe62eb6
Use conditionals and a macro to avoid provoking compilers that do
not support this attribute.
Adds a macro named CPP_ATTRIBUTE_FALLTHROUGH which is invoked right
before a following case statement to declare that the intent is to
fall through. Example:
...
case xxx:
...
CPP_ATTRIBUTE_FALLTHROUGH;
case yyy:
...
The gcc/clang alternative of adding comments that contain "FALLTHROUGH"
suffers from the problem that *by default* ccache strips the comments
so that they are not present for the real compilation.
Change-Id: I77ddeb7dae46db8398b014a93f6a71bedc64ada9
Signed-off-by: Dale Stimson <dale.b.stimson@intel.com>
38 lines
1.3 KiB
C++
38 lines
1.3 KiB
C++
/*
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* Copyright (c) 2018, Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#pragma once
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#if !defined __has_cpp_attribute
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#define CPP_ATTRIBUTE_FALLTHROUGH
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#else
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#if !__has_cpp_attribute(fallthrough)
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#define CPP_ATTRIBUTE_FALLTHROUGH
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#else
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#define CPP_ATTRIBUTE_FALLTHROUGH [[fallthrough]]
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#endif
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#endif
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