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5a077e48b9
Status (for both STL and Non-STL builds): - Builds and tests with GCC 16 - Clang 22: Reflection not available yet - MSVC: Reflection not available yet
74 lines
2.9 KiB
C++
74 lines
2.9 KiB
C++
///\file
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/******************************************************************************
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The MIT License(MIT)
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Embedded Template Library.
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https://github.com/ETLCPP/etl
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https://www.etlcpp.com
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Copyright(c) 2026 BMW AG
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files(the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions :
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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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 THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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******************************************************************************/
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#ifndef ETL_META_INCLUDED
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#define ETL_META_INCLUDED
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#include "platform.h"
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//*****************************************************************************
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/// \defgroup meta meta
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/// C++26 static reflection (P2996).
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/// \ingroup etl
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//*****************************************************************************
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//*****************************************************************************
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// This is the one and only place where reflection support is detected.
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//
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// GCC 16 is currently the only compiler that implements enough of P2996 for
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// etl::meta, and it does so for both STL and non-STL builds.
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// See .devcontainer/gcc16 for the reference toolchain.
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//
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// Clang (including the Bloomberg p2996 fork) and MSVC are not supported yet.
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//
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// ETL_HAS_REFLECTION is always defined, as 1 or 0.
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// When it is 0 this header defines nothing else, so user code can include
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// etl/meta.h unconditionally and test ETL_HAS_REFLECTION.
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//*****************************************************************************
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#if defined(ETL_COMPILER_GCC) && defined(__cpp_impl_reflection) && (__cpp_impl_reflection >= 202506L)
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#define ETL_HAS_REFLECTION 1
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#else
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#define ETL_HAS_REFLECTION 0
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#endif
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#if ETL_HAS_REFLECTION
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#if ETL_USING_STL
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// The full standard library is available, so etl::meta is a thin
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// using-declaration layer over std::meta.
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#include "private/meta/stl.h"
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#else
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// No standard library: etl::meta supplies the minimal std declarations
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// that the reflection builtins require.
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#include "private/meta/gcc.h"
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#endif
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#endif
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#endif // ETL_META_INCLUDED
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