// (C) Copyright Douglas Gregor 2010
//
-// Use, modification and distribution are subject to the
-// Boost Software License, Version 1.0. (See accompanying file
+// Use, modification and distribution are subject to the
+// Boost Software License, Version 1.0. (See accompanying file
// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
// See http://www.boost.org for most recent version.
// Clang compiler setup.
-#if __has_feature(cxx_exceptions) && !defined(BOOST_NO_EXCEPTIONS)
-#else
+#define BOOST_HAS_PRAGMA_ONCE
+
+#if !__has_feature(cxx_exceptions) && !defined(BOOST_NO_EXCEPTIONS)
# define BOOST_NO_EXCEPTIONS
#endif
-#if __has_feature(cxx_rtti)
-#else
+#if !__has_feature(cxx_rtti) && !defined(BOOST_NO_RTTI)
# define BOOST_NO_RTTI
#endif
-#if defined(__int64)
+#if !__has_feature(cxx_rtti) && !defined(BOOST_NO_TYPEID)
+# define BOOST_NO_TYPEID
+#endif
+
+#if defined(__int64) && !defined(__GNUC__)
# define BOOST_HAS_MS_INT64
#endif
#define BOOST_HAS_NRVO
-// NOTE: Clang's C++0x support is not worth detecting. However, it
-// supports both extern templates and "long long" even in C++98/03
-// mode.
-#define BOOST_NO_AUTO_DECLARATIONS
-#define BOOST_NO_AUTO_MULTIDECLARATIONS
-#define BOOST_NO_CHAR16_T
-#define BOOST_NO_CHAR32_T
-#define BOOST_NO_CONCEPTS
-#define BOOST_NO_CONSTEXPR
-#define BOOST_NO_DECLTYPE
-#define BOOST_NO_DEFAULTED_FUNCTIONS
-#define BOOST_NO_DELETED_FUNCTIONS
-#define BOOST_NO_EXPLICIT_CONVERSION_OPERATORS
-#define BOOST_NO_FUNCTION_TEMPLATE_DEFAULT_ARGS
-#define BOOST_NO_INITIALIZER_LISTS
-#define BOOST_NO_LAMBDAS
-#define BOOST_NO_NULLPTR
-#define BOOST_NO_RAW_LITERALS
-#define BOOST_NO_RVALUE_REFERENCES
-#define BOOST_NO_SCOPED_ENUMS
-#define BOOST_NO_STATIC_ASSERT
-#define BOOST_NO_TEMPLATE_ALIASES
-#define BOOST_NO_UNICODE_LITERALS
-#define BOOST_NO_VARIADIC_TEMPLATES
-
-// HACK: Clang does support extern templates, but Boost's test for
-// them is wrong.
-#define BOOST_NO_EXTERN_TEMPLATE
+// Branch prediction hints
+#if defined(__has_builtin)
+#if __has_builtin(__builtin_expect)
+#define BOOST_LIKELY(x) __builtin_expect(x, 1)
+#define BOOST_UNLIKELY(x) __builtin_expect(x, 0)
+#endif
+#endif
+
+// Clang supports "long long" in all compilation modes.
+#define BOOST_HAS_LONG_LONG
+
+//
+// Dynamic shared object (DSO) and dynamic-link library (DLL) support
+//
+#if !defined(_WIN32) && !defined(__WIN32__) && !defined(WIN32)
+# define BOOST_SYMBOL_EXPORT __attribute__((__visibility__("default")))
+# define BOOST_SYMBOL_IMPORT
+# define BOOST_SYMBOL_VISIBLE __attribute__((__visibility__("default")))
+#endif
+
+//
+// The BOOST_FALLTHROUGH macro can be used to annotate implicit fall-through
+// between switch labels.
+//
+#if __cplusplus >= 201103L && defined(__has_warning)
+# if __has_feature(cxx_attributes) && __has_warning("-Wimplicit-fallthrough")
+# define BOOST_FALLTHROUGH [[clang::fallthrough]]
+# endif
+#endif
+
+#if !__has_feature(cxx_auto_type)
+# define BOOST_NO_CXX11_AUTO_DECLARATIONS
+# define BOOST_NO_CXX11_AUTO_MULTIDECLARATIONS
+#endif
+
+#if !(defined(__GXX_EXPERIMENTAL_CXX0X__) || __cplusplus >= 201103L)
+# define BOOST_NO_CXX11_CHAR16_T
+# define BOOST_NO_CXX11_CHAR32_T
+#endif
+
+#if !__has_feature(cxx_constexpr)
+# define BOOST_NO_CXX11_CONSTEXPR
+#endif
+
+#if !__has_feature(cxx_decltype)
+# define BOOST_NO_CXX11_DECLTYPE
+#endif
+
+#if !__has_feature(cxx_decltype_incomplete_return_types)
+# define BOOST_NO_CXX11_DECLTYPE_N3276
+#endif
+
+#if !__has_feature(cxx_defaulted_functions)
+# define BOOST_NO_CXX11_DEFAULTED_FUNCTIONS
+#endif
+
+#if !__has_feature(cxx_deleted_functions)
+# define BOOST_NO_CXX11_DELETED_FUNCTIONS
+#endif
+
+#if !__has_feature(cxx_explicit_conversions)
+# define BOOST_NO_CXX11_EXPLICIT_CONVERSION_OPERATORS
+#endif
+
+#if !__has_feature(cxx_default_function_template_args)
+# define BOOST_NO_CXX11_FUNCTION_TEMPLATE_DEFAULT_ARGS
+#endif
+
+#if !__has_feature(cxx_generalized_initializers)
+# define BOOST_NO_CXX11_HDR_INITIALIZER_LIST
+#endif
+
+#if !__has_feature(cxx_lambdas)
+# define BOOST_NO_CXX11_LAMBDAS
+#endif
+
+#if !__has_feature(cxx_local_type_template_args)
+# define BOOST_NO_CXX11_LOCAL_CLASS_TEMPLATE_PARAMETERS
+#endif
+
+#if !__has_feature(cxx_noexcept)
+# define BOOST_NO_CXX11_NOEXCEPT
+#endif
+
+#if !__has_feature(cxx_nullptr)
+# define BOOST_NO_CXX11_NULLPTR
+#endif
+
+#if !__has_feature(cxx_range_for)
+# define BOOST_NO_CXX11_RANGE_BASED_FOR
+#endif
+
+#if !__has_feature(cxx_raw_string_literals)
+# define BOOST_NO_CXX11_RAW_LITERALS
+#endif
+
+#if !__has_feature(cxx_generalized_initializers)
+# define BOOST_NO_CXX11_UNIFIED_INITIALIZATION_SYNTAX
+#endif
+
+#if !__has_feature(cxx_rvalue_references)
+# define BOOST_NO_CXX11_RVALUE_REFERENCES
+#endif
+
+#if !__has_feature(cxx_strong_enums)
+# define BOOST_NO_CXX11_SCOPED_ENUMS
+#endif
+
+#if !__has_feature(cxx_static_assert)
+# define BOOST_NO_CXX11_STATIC_ASSERT
+#endif
+
+#if !__has_feature(cxx_alias_templates)
+# define BOOST_NO_CXX11_TEMPLATE_ALIASES
+#endif
+
+#if !__has_feature(cxx_unicode_literals)
+# define BOOST_NO_CXX11_UNICODE_LITERALS
+#endif
+
+#if !__has_feature(cxx_variadic_templates)
+# define BOOST_NO_CXX11_VARIADIC_TEMPLATES
+#endif
+
+#if !__has_feature(cxx_user_literals)
+# define BOOST_NO_CXX11_USER_DEFINED_LITERALS
+#endif
+
+#if !(__has_feature(cxx_alignas) || __has_extension(cxx_alignas))
+# define BOOST_NO_CXX11_ALIGNAS
+#endif
+
+#if !__has_feature(cxx_trailing_return)
+# define BOOST_NO_CXX11_TRAILING_RESULT_TYPES
+#endif
+
+#if !__has_feature(cxx_inline_namespaces)
+# define BOOST_NO_CXX11_INLINE_NAMESPACES
+#endif
+
+// Clang always supports variadic macros
+// Clang always supports extern templates
#ifndef BOOST_COMPILER
# define BOOST_COMPILER "Clang version " __clang_version__
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