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e877707ecb
Update to https://www.boost.org/users/history/version_1_85_0.html - no functional changes on regex - support for newer compiler (e.g. VS2022) versions/features/workarounds Close #15040
371 lines
10 KiB
C++
371 lines
10 KiB
C++
// (C) Copyright Douglas Gregor 2010
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//
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// Use, modification and distribution are subject to the
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// Boost Software License, Version 1.0. (See accompanying file
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// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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// See http://www.boost.org for most recent version.
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// Clang compiler setup.
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#define BOOST_HAS_PRAGMA_ONCE
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// Detecting `-fms-extension` compiler flag assuming that _MSC_VER defined when that flag is used.
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#if defined (_MSC_VER) && (__clang_major__ > 3 || (__clang_major__ == 3 && __clang_minor__ >= 4))
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# define BOOST_HAS_PRAGMA_DETECT_MISMATCH
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#endif
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// When compiling with clang before __has_extension was defined,
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// even if one writes 'defined(__has_extension) && __has_extension(xxx)',
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// clang reports a compiler error. So the only workaround found is:
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#ifndef __has_extension
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#define __has_extension __has_feature
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#endif
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#ifndef __has_attribute
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#define __has_attribute(x) 0
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#endif
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#ifndef __has_cpp_attribute
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#define __has_cpp_attribute(x) 0
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#endif
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#if !__has_feature(cxx_exceptions) && !defined(BOOST_NO_EXCEPTIONS)
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# define BOOST_NO_EXCEPTIONS
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#endif
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#if !__has_feature(cxx_rtti) && !defined(BOOST_NO_RTTI)
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# define BOOST_NO_RTTI
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#endif
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#if !__has_feature(cxx_rtti) && !defined(BOOST_NO_TYPEID)
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# define BOOST_NO_TYPEID
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#endif
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#if !__has_feature(cxx_thread_local)
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# define BOOST_NO_CXX11_THREAD_LOCAL
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#endif
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#ifdef __is_identifier
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#if !__is_identifier(__int64) && !defined(__GNUC__)
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# define BOOST_HAS_MS_INT64
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#endif
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#endif
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#if __has_include(<stdint.h>)
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# define BOOST_HAS_STDINT_H
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#endif
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#if (defined(linux) || defined(__linux) || defined(__linux__) || defined(__GNU__) || defined(__GLIBC__)) && !defined(_CRAYC)
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#if (__clang_major__ >= 4) && defined(__has_include)
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#if __has_include(<quadmath.h>)
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# define BOOST_HAS_FLOAT128
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#endif
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#endif
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#endif
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#define BOOST_HAS_NRVO
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// Branch prediction hints
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#if !defined (__c2__) && defined(__has_builtin)
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#if __has_builtin(__builtin_expect)
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#define BOOST_LIKELY(x) __builtin_expect(x, 1)
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#define BOOST_UNLIKELY(x) __builtin_expect(x, 0)
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#endif
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#endif
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// Clang supports "long long" in all compilation modes.
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#define BOOST_HAS_LONG_LONG
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//
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// We disable this if the compiler is really nvcc with C++03 as it
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// doesn't actually support __int128 as of CUDA_VERSION=7500
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// even though it defines __SIZEOF_INT128__.
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// See https://svn.boost.org/trac/boost/ticket/10418
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// https://svn.boost.org/trac/boost/ticket/11852
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// Only re-enable this for nvcc if you're absolutely sure
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// of the circumstances under which it's supported.
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// Similarly __SIZEOF_INT128__ is defined when targetting msvc
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// compatibility even though the required support functions are absent.
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//
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#if defined(__CUDACC__)
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# if defined(BOOST_GCC_CXX11)
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# define BOOST_NVCC_CXX11
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# else
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# define BOOST_NVCC_CXX03
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# endif
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#endif
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#if defined(__SIZEOF_INT128__) && !defined(BOOST_NVCC_CXX03) && !defined(_MSC_VER)
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# define BOOST_HAS_INT128
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#endif
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//
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// Dynamic shared object (DSO) and dynamic-link library (DLL) support
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//
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#if defined(_WIN32) || defined(__WIN32__) || defined(WIN32) || defined(__CYGWIN__)
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# define BOOST_HAS_DECLSPEC
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# define BOOST_SYMBOL_EXPORT __attribute__((__dllexport__))
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# define BOOST_SYMBOL_IMPORT __attribute__((__dllimport__))
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#else
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# define BOOST_SYMBOL_EXPORT __attribute__((__visibility__("default")))
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# define BOOST_SYMBOL_VISIBLE __attribute__((__visibility__("default")))
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# define BOOST_SYMBOL_IMPORT
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#endif
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//
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// The BOOST_FALLTHROUGH macro can be used to annotate implicit fall-through
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// between switch labels.
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//
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#if __cplusplus >= 201103L && defined(__has_warning)
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# if __has_feature(cxx_attributes) && __has_warning("-Wimplicit-fallthrough")
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# define BOOST_FALLTHROUGH [[clang::fallthrough]]
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# endif
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#endif
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#if !__has_feature(cxx_auto_type)
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# define BOOST_NO_CXX11_AUTO_DECLARATIONS
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# define BOOST_NO_CXX11_AUTO_MULTIDECLARATIONS
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#endif
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//
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// Currently clang on Windows using VC++ RTL does not support C++11's char16_t or char32_t
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//
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#if (defined(_MSC_VER) && (_MSC_VER < 1900)) || !(defined(__GXX_EXPERIMENTAL_CXX0X__) || __cplusplus >= 201103L)
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# define BOOST_NO_CXX11_CHAR16_T
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# define BOOST_NO_CXX11_CHAR32_T
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#endif
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#if defined(_MSC_VER) && (_MSC_VER >= 1800) && !defined(__GNUC__)
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#define BOOST_HAS_EXPM1
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#define BOOST_HAS_LOG1P
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#endif
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#if !__has_feature(cxx_constexpr)
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# define BOOST_NO_CXX11_CONSTEXPR
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#endif
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#if !__has_feature(cxx_decltype)
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# define BOOST_NO_CXX11_DECLTYPE
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#endif
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#if !__has_feature(cxx_decltype_incomplete_return_types)
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# define BOOST_NO_CXX11_DECLTYPE_N3276
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#endif
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#if !__has_feature(cxx_defaulted_functions)
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# define BOOST_NO_CXX11_DEFAULTED_FUNCTIONS
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#endif
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#if !__has_feature(cxx_deleted_functions)
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# define BOOST_NO_CXX11_DELETED_FUNCTIONS
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#endif
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#if !__has_feature(cxx_explicit_conversions)
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# define BOOST_NO_CXX11_EXPLICIT_CONVERSION_OPERATORS
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#endif
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#if !__has_feature(cxx_default_function_template_args)
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# define BOOST_NO_CXX11_FUNCTION_TEMPLATE_DEFAULT_ARGS
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#endif
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#if !__has_feature(cxx_generalized_initializers)
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# define BOOST_NO_CXX11_HDR_INITIALIZER_LIST
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#endif
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#if !__has_feature(cxx_lambdas)
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# define BOOST_NO_CXX11_LAMBDAS
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#endif
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#if !__has_feature(cxx_local_type_template_args)
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# define BOOST_NO_CXX11_LOCAL_CLASS_TEMPLATE_PARAMETERS
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#endif
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#if !__has_feature(cxx_noexcept)
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# define BOOST_NO_CXX11_NOEXCEPT
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#endif
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#if !__has_feature(cxx_nullptr)
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# define BOOST_NO_CXX11_NULLPTR
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#endif
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#if !__has_feature(cxx_range_for)
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# define BOOST_NO_CXX11_RANGE_BASED_FOR
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#endif
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#if !__has_feature(cxx_raw_string_literals)
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# define BOOST_NO_CXX11_RAW_LITERALS
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#endif
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#if !__has_feature(cxx_reference_qualified_functions)
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# define BOOST_NO_CXX11_REF_QUALIFIERS
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#endif
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#if !__has_feature(cxx_generalized_initializers)
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# define BOOST_NO_CXX11_UNIFIED_INITIALIZATION_SYNTAX
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#endif
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#if !__has_feature(cxx_rvalue_references)
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# define BOOST_NO_CXX11_RVALUE_REFERENCES
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#endif
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#if !__has_feature(cxx_strong_enums)
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# define BOOST_NO_CXX11_SCOPED_ENUMS
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#endif
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#if !__has_feature(cxx_static_assert)
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# define BOOST_NO_CXX11_STATIC_ASSERT
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#endif
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#if !__has_feature(cxx_alias_templates)
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# define BOOST_NO_CXX11_TEMPLATE_ALIASES
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#endif
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#if !__has_feature(cxx_unicode_literals)
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# define BOOST_NO_CXX11_UNICODE_LITERALS
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#endif
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#if !__has_feature(cxx_variadic_templates)
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# define BOOST_NO_CXX11_VARIADIC_TEMPLATES
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#endif
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#if !__has_feature(cxx_user_literals)
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# define BOOST_NO_CXX11_USER_DEFINED_LITERALS
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#endif
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#if !__has_feature(cxx_alignas)
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# define BOOST_NO_CXX11_ALIGNAS
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#endif
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#if !__has_feature(cxx_alignof)
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# define BOOST_NO_CXX11_ALIGNOF
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#endif
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#if !__has_feature(cxx_trailing_return)
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# define BOOST_NO_CXX11_TRAILING_RESULT_TYPES
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#endif
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#if !__has_feature(cxx_inline_namespaces)
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# define BOOST_NO_CXX11_INLINE_NAMESPACES
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#endif
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#if !__has_feature(cxx_override_control)
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# define BOOST_NO_CXX11_FINAL
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# define BOOST_NO_CXX11_OVERRIDE
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#endif
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#if !__has_feature(cxx_unrestricted_unions)
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# define BOOST_NO_CXX11_UNRESTRICTED_UNION
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#endif
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#if !(__has_feature(__cxx_binary_literals__) || __has_extension(__cxx_binary_literals__))
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# define BOOST_NO_CXX14_BINARY_LITERALS
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#endif
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#if !__has_feature(__cxx_decltype_auto__)
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# define BOOST_NO_CXX14_DECLTYPE_AUTO
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#endif
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#if !__has_feature(__cxx_aggregate_nsdmi__)
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# define BOOST_NO_CXX14_AGGREGATE_NSDMI
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#endif
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#if !__has_feature(__cxx_init_captures__)
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# define BOOST_NO_CXX14_INITIALIZED_LAMBDA_CAPTURES
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#endif
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#if !__has_feature(__cxx_generic_lambdas__)
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# define BOOST_NO_CXX14_GENERIC_LAMBDAS
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#endif
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// clang < 3.5 has a defect with dependent type, like following.
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//
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// template <class T>
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// constexpr typename enable_if<pred<T> >::type foo(T &)
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// { } // error: no return statement in constexpr function
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//
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// This issue also affects C++11 mode, but C++11 constexpr requires return stmt.
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// Therefore we don't care such case.
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//
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// Note that we can't check Clang version directly as the numbering system changes depending who's
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// creating the Clang release (see https://github.com/boostorg/config/pull/39#issuecomment-59927873)
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// so instead verify that we have a feature that was introduced at the same time as working C++14
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// constexpr (generic lambda's in this case):
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//
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#if !__has_feature(__cxx_generic_lambdas__) || !__has_feature(__cxx_relaxed_constexpr__)
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# define BOOST_NO_CXX14_CONSTEXPR
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#endif
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#if !__has_feature(__cxx_return_type_deduction__)
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# define BOOST_NO_CXX14_RETURN_TYPE_DEDUCTION
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#endif
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#if !__has_feature(__cxx_variable_templates__)
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# define BOOST_NO_CXX14_VARIABLE_TEMPLATES
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#endif
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#if !defined(__cpp_structured_bindings) || (__cpp_structured_bindings < 201606)
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# define BOOST_NO_CXX17_STRUCTURED_BINDINGS
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#endif
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#if !defined(__cpp_if_constexpr) || (__cpp_if_constexpr < 201606)
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# define BOOST_NO_CXX17_IF_CONSTEXPR
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#endif
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// Clang 3.9+ in c++1z
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#if !__has_cpp_attribute(fallthrough) || __cplusplus < 201406L
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# define BOOST_NO_CXX17_INLINE_VARIABLES
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# define BOOST_NO_CXX17_FOLD_EXPRESSIONS
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#endif
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#if (__clang_major__ < 4) || (__cplusplus < 201406L) /* non-standard value that is greater than 201402, which is reported by clang 4.0.0 for C++1z */
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# define BOOST_NO_CXX17_AUTO_NONTYPE_TEMPLATE_PARAMS
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#endif
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#if __cplusplus < 201103L
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#define BOOST_NO_CXX11_SFINAE_EXPR
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#endif
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#if __cplusplus < 201400
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// All versions with __cplusplus above this value seem to support this:
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# define BOOST_NO_CXX14_DIGIT_SEPARATORS
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#endif
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// Unreachable code markup
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#if defined(__has_builtin)
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#if __has_builtin(__builtin_unreachable)
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#define BOOST_UNREACHABLE_RETURN(x) __builtin_unreachable();
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#endif
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#endif
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// Deprecated symbol markup
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#if __has_attribute(deprecated)
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#define BOOST_DEPRECATED(msg) __attribute__((deprecated(msg)))
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#endif
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#if (__clang_major__ == 3) && (__clang_minor__ == 0)
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// Apparently a clang bug:
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# define BOOST_NO_CXX11_FIXED_LENGTH_VARIADIC_TEMPLATE_EXPANSION_PACKS
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#endif
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// Clang has supported the 'unused' attribute since the first release.
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#define BOOST_ATTRIBUTE_UNUSED __attribute__((__unused__))
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// Type aliasing hint.
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#if __has_attribute(__may_alias__)
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# define BOOST_MAY_ALIAS __attribute__((__may_alias__))
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#endif
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#ifndef BOOST_COMPILER
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# define BOOST_COMPILER "Clang version " __clang_version__
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#endif
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// Macro used to identify the Clang compiler.
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#define BOOST_CLANG 1
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// BOOST_CLANG_VERSION
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#include <boost/config/compiler/clang_version.hpp>
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