149 lines
5.0 KiB
C++
149 lines
5.0 KiB
C++
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// Copyright (c) 2016-2024 Antony Polukhin
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// Copyright (c) 2022 Denis Mikhailov
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_PFR_CONFIG_HPP
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#define BOOST_PFR_CONFIG_HPP
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#pragma once
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#if __cplusplus >= 201402L || (defined(_MSC_VER) && defined(_MSVC_LANG) && _MSC_VER > 1900)
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#include <type_traits> // to get non standard platform macro definitions (__GLIBCXX__ for example)
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#endif
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/// \file boost/pfr/config.hpp
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/// Contains all the macros that describe Boost.PFR configuration, like BOOST_PFR_ENABLED
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///
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/// \note This header file doesn't require C++14 Standard and supports all C++ compilers, even pre C++14 compilers (C++11, C++03...).
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// Reminder:
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// * MSVC++ 14.2 _MSC_VER == 1927 <- Loophole is known to work (Visual Studio ????)
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// * MSVC++ 14.1 _MSC_VER == 1916 <- Loophole is known to NOT work (Visual Studio 2017)
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// * MSVC++ 14.0 _MSC_VER == 1900 (Visual Studio 2015)
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// * MSVC++ 12.0 _MSC_VER == 1800 (Visual Studio 2013)
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#ifdef BOOST_PFR_NOT_SUPPORTED
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# error Please, do not set BOOST_PFR_NOT_SUPPORTED value manually, use '-DBOOST_PFR_ENABLED=0' instead of it
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#endif
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#if defined(_MSC_VER)
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# if !defined(_MSVC_LANG) || _MSC_VER <= 1900
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# define BOOST_PFR_NOT_SUPPORTED 1
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# endif
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#elif __cplusplus < 201402L
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# define BOOST_PFR_NOT_SUPPORTED 1
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#endif
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#ifndef BOOST_PFR_USE_LOOPHOLE
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# if defined(_MSC_VER)
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# if _MSC_VER >= 1927
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# define BOOST_PFR_USE_LOOPHOLE 1
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# else
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# define BOOST_PFR_USE_LOOPHOLE 0
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# endif
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# elif defined(__clang_major__) && __clang_major__ >= 8
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# define BOOST_PFR_USE_LOOPHOLE 0
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# else
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# define BOOST_PFR_USE_LOOPHOLE 1
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# endif
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#endif
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#ifndef BOOST_PFR_USE_CPP17
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# ifdef __cpp_structured_bindings
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# define BOOST_PFR_USE_CPP17 1
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# elif defined(_MSVC_LANG)
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# if _MSVC_LANG >= 201703L
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# define BOOST_PFR_USE_CPP17 1
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# else
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# define BOOST_PFR_USE_CPP17 0
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# endif
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# else
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# define BOOST_PFR_USE_CPP17 0
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# endif
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#endif
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#if (!BOOST_PFR_USE_CPP17 && !BOOST_PFR_USE_LOOPHOLE)
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# if (defined(_MSC_VER) && _MSC_VER < 1916) ///< in Visual Studio 2017 v15.9 PFR library with classic engine normally works
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# define BOOST_PFR_NOT_SUPPORTED 1
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# endif
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#endif
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#ifndef BOOST_PFR_USE_STD_MAKE_INTEGRAL_SEQUENCE
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// Assume that libstdc++ since GCC-7.3 does not have linear instantiation depth in std::make_integral_sequence
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# if defined( __GLIBCXX__) && __GLIBCXX__ >= 20180101
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# define BOOST_PFR_USE_STD_MAKE_INTEGRAL_SEQUENCE 1
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# elif defined(_MSC_VER)
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# define BOOST_PFR_USE_STD_MAKE_INTEGRAL_SEQUENCE 1
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//# elif other known working lib
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# else
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# define BOOST_PFR_USE_STD_MAKE_INTEGRAL_SEQUENCE 0
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# endif
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#endif
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#ifndef BOOST_PFR_HAS_GUARANTEED_COPY_ELISION
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# if defined(__cpp_guaranteed_copy_elision) && (!defined(_MSC_VER) || _MSC_VER > 1928)
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# define BOOST_PFR_HAS_GUARANTEED_COPY_ELISION 1
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# else
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# define BOOST_PFR_HAS_GUARANTEED_COPY_ELISION 0
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# endif
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#endif
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#ifndef BOOST_PFR_ENABLE_IMPLICIT_REFLECTION
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# if defined(__cpp_lib_is_aggregate)
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# define BOOST_PFR_ENABLE_IMPLICIT_REFLECTION 1
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# else
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// There is no way to detect potential ability to be reflectable without std::is_aggregare
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# define BOOST_PFR_ENABLE_IMPLICIT_REFLECTION 0
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# endif
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#endif
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#ifndef BOOST_PFR_CORE_NAME_ENABLED
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# if (__cplusplus >= 202002L) || (defined(_MSVC_LANG) && (_MSVC_LANG >= 202002L))
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# if (defined(__cpp_nontype_template_args) && __cpp_nontype_template_args >= 201911) \
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|| (defined(__clang_major__) && __clang_major__ >= 12)
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# define BOOST_PFR_CORE_NAME_ENABLED 1
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# else
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# define BOOST_PFR_CORE_NAME_ENABLED 0
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# endif
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# else
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# define BOOST_PFR_CORE_NAME_ENABLED 0
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# endif
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#endif
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#ifndef BOOST_PFR_CORE_NAME_PARSING
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# if defined(_MSC_VER) && !defined(__clang__)
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# define BOOST_PFR_CORE_NAME_PARSING (sizeof("auto __cdecl boost::pfr::detail::name_of_field_impl<") - 1, sizeof(">(void) noexcept") - 1, backward("->"))
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# elif defined(__clang__)
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# define BOOST_PFR_CORE_NAME_PARSING (sizeof("auto boost::pfr::detail::name_of_field_impl() [MsvcWorkaround = ") - 1, sizeof("}]") - 1, backward("."))
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# elif defined(__GNUC__)
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# define BOOST_PFR_CORE_NAME_PARSING (sizeof("consteval auto boost::pfr::detail::name_of_field_impl() [with MsvcWorkaround = ") - 1, sizeof(")]") - 1, backward("::"))
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# else
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// Default parser for other platforms... Just skip nothing!
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# define BOOST_PFR_CORE_NAME_PARSING (0, 0, "")
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# endif
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#endif
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#if defined(__has_cpp_attribute)
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# if __has_cpp_attribute(maybe_unused)
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# define BOOST_PFR_MAYBE_UNUSED [[maybe_unused]]
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# endif
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#endif
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#ifndef BOOST_PFR_MAYBE_UNUSED
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# define BOOST_PFR_MAYBE_UNUSED
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#endif
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#ifndef BOOST_PFR_ENABLED
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# ifdef BOOST_PFR_NOT_SUPPORTED
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# define BOOST_PFR_ENABLED 0
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# else
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# define BOOST_PFR_ENABLED 1
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# endif
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#endif
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#undef BOOST_PFR_NOT_SUPPORTED
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#endif // BOOST_PFR_CONFIG_HPP
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