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Merge pull request #86 from denzor200/feature/85-boost_no_pfr_macro
Implemented BOOST_PFR_ENABLED macro
This commit is contained in:
Antony Polukhin
GitHub
@@ -469,6 +469,7 @@ By default Boost.PFR [*auto-detects your compiler abilities] and automatically d
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[[*BOOST_PFR_USE_STD_MAKE_INTEGRAL_SEQUENCE*] [Define to `0` if you are hit by the template instantiation depth issues with `std::make_integer_sequence` and wish to use Boost.PFR version of that metafunction. Define to `1` to override Boost.PFR detection logic. ]]
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[[*BOOST_PFR_HAS_GUARANTEED_COPY_ELISION*] [Define to `0` if your compiler does not implement C++17 guaranteed copy elision properly and fails to reflect aggregates with non-movable fields. Define to `1` to override Boost.PFR detection logic. ]]
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[[*BOOST_PFR_ENABLE_IMPLICIT_REFLECTION*] [Define to `0` if you are hit by lots of non-effective choices made by implicitly reflection. Define to `1` to override Boost.PFR detection logic. ]]
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[[*BOOST_PFR_ENABLED*] [On platforms where Boost.PFR is not supported, the `boost/pfr/config.hpp` header defines the BOOST_PFR_ENABLED macro equal to 0. Defining this macro as 0 before including the header disables the Boost.PFR library. ]]
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]
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@@ -9,6 +9,7 @@
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/// \file boost/pfr.hpp
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/// Includes all the Boost.PFR headers
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#include <boost/pfr/config.hpp>
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#include <boost/pfr/core.hpp>
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#include <boost/pfr/functions_for.hpp>
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#include <boost/pfr/functors.hpp>
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114
include/boost/pfr/config.hpp
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114
include/boost/pfr/config.hpp
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@@ -0,0 +1,114 @@
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// Copyright (c) 2016-2022 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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#include <type_traits> // to get non standard platform macro definitions (__GLIBCXX__ for example)
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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, don't 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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#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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@@ -1,4 +1,5 @@
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// Copyright (c) 2016-2022 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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@@ -7,94 +8,19 @@
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#define BOOST_PFR_DETAIL_CONFIG_HPP
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#pragma once
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#include <type_traits> // to get non standard platform macro definitions (__GLIBCXX__ for example)
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#include <boost/pfr/config.hpp>
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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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#if !BOOST_PFR_ENABLED
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#if defined(_MSC_VER)
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# if !defined(_MSVC_LANG) || _MSC_VER <= 1900
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# error Boost.PFR library requires more modern MSVC compiler.
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# endif
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#elif __cplusplus < 201402L
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# error Boost.PFR library requires at least C++14.
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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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# error Boost.PFR requires /std:c++latest or /std:c++17 flags on your compiler.
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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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#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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#error Boost.PFR library is not supported in your environment. \
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Try one of the possible solutions: \
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1. try to take away an '-DBOOST_PFR_ENABLED=0', if it exists \
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2. enable C++14; \
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3. enable C++17; \
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4. update your compiler; \
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or disable this error by '-DBOOST_PFR_ENABLED=1' if you really know what are you doing.
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#endif // !BOOST_PFR_ENABLED
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#endif // BOOST_PFR_DETAIL_CONFIG_HPP
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10
test/compile-fail/boost_pfr_disabled_via_macro.cpp
Normal file
10
test/compile-fail/boost_pfr_disabled_via_macro.cpp
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@@ -0,0 +1,10 @@
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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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#define BOOST_PFR_ENABLED 0
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#include <boost/pfr/core.hpp>
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int main() { }
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@@ -3,7 +3,7 @@
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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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#include <boost/pfr/core.hpp>
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#include <boost/pfr/config.hpp> // inclusion of an another PFR header may fail when BOOST_PFR_ENABLED=0
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#include <iostream>
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@@ -14,6 +14,7 @@ int main() {
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<< "BOOST_PFR_USE_STD_MAKE_INTEGRAL_SEQUENCE == " << BOOST_PFR_USE_STD_MAKE_INTEGRAL_SEQUENCE << '\n'
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<< "BOOST_PFR_HAS_GUARANTEED_COPY_ELISION == " << BOOST_PFR_HAS_GUARANTEED_COPY_ELISION << '\n'
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<< "BOOST_PFR_ENABLE_IMPLICIT_REFLECTION == " << BOOST_PFR_ENABLE_IMPLICIT_REFLECTION << '\n'
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<< "BOOST_PFR_ENABLED == " << BOOST_PFR_ENABLED << '\n'
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<< "__cplusplus == " << __cplusplus << '\n'
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#ifdef __cpp_structured_bindings
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<< "__cpp_structured_bindings == " << __cpp_structured_bindings << '\n'
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