diff options
Diffstat (limited to 'src/third_party/boost-1.70.0/boost/config/compiler/clang.hpp')
| -rw-r--r-- | src/third_party/boost-1.70.0/boost/config/compiler/clang.hpp | 348 |
1 files changed, 348 insertions, 0 deletions
diff --git a/src/third_party/boost-1.70.0/boost/config/compiler/clang.hpp b/src/third_party/boost-1.70.0/boost/config/compiler/clang.hpp new file mode 100644 index 00000000000..52b23d9d020 --- /dev/null +++ b/src/third_party/boost-1.70.0/boost/config/compiler/clang.hpp @@ -0,0 +1,348 @@ +// (C) Copyright Douglas Gregor 2010 +// +// 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. + +#define BOOST_HAS_PRAGMA_ONCE + +// Detecting `-fms-extension` compiler flag assuming that _MSC_VER defined when that flag is used. +#if defined (_MSC_VER) && (__clang_major__ > 3 || (__clang_major__ == 3 && __clang_minor__ >= 4)) +# define BOOST_HAS_PRAGMA_DETECT_MISMATCH +#endif + +// When compiling with clang before __has_extension was defined, +// even if one writes 'defined(__has_extension) && __has_extension(xxx)', +// clang reports a compiler error. So the only workaround found is: + +#ifndef __has_extension +#define __has_extension __has_feature +#endif + +#ifndef __has_attribute +#define __has_attribute(x) 0 +#endif + +#ifndef __has_cpp_attribute +#define __has_cpp_attribute(x) 0 +#endif + +#if !__has_feature(cxx_exceptions) && !defined(BOOST_NO_EXCEPTIONS) +# define BOOST_NO_EXCEPTIONS +#endif + +#if !__has_feature(cxx_rtti) && !defined(BOOST_NO_RTTI) +# define BOOST_NO_RTTI +#endif + +#if !__has_feature(cxx_rtti) && !defined(BOOST_NO_TYPEID) +# define BOOST_NO_TYPEID +#endif + +#if !__has_feature(cxx_thread_local) +# define BOOST_NO_CXX11_THREAD_LOCAL +#endif + +#ifdef __is_identifier +#if !__is_identifier(__int64) && !defined(__GNUC__) +# define BOOST_HAS_MS_INT64 +#endif +#endif + +#if __has_include(<stdint.h>) +# define BOOST_HAS_STDINT_H +#endif + +#if (defined(linux) || defined(__linux) || defined(__linux__) || defined(__GNU__) || defined(__GLIBC__)) && !defined(_CRAYC) +#if (__clang_major__ >= 4) && defined(__has_include) +#if __has_include(<quadmath.h>) +# define BOOST_HAS_FLOAT128 +#endif +#endif +#endif + + +#define BOOST_HAS_NRVO + +// Branch prediction hints +#if !defined (__c2__) && 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 + +// +// We disable this if the compiler is really nvcc with C++03 as it +// doesn't actually support __int128 as of CUDA_VERSION=7500 +// even though it defines __SIZEOF_INT128__. +// See https://svn.boost.org/trac/boost/ticket/10418 +// https://svn.boost.org/trac/boost/ticket/11852 +// Only re-enable this for nvcc if you're absolutely sure +// of the circumstances under which it's supported. +// Similarly __SIZEOF_INT128__ is defined when targetting msvc +// compatibility even though the required support functions are absent. +// +#if defined(__CUDACC__) +# if defined(BOOST_GCC_CXX11) +# define BOOST_NVCC_CXX11 +# else +# define BOOST_NVCC_CXX03 +# endif +#endif + +#if defined(__SIZEOF_INT128__) && !defined(BOOST_NVCC_CXX03) && !defined(_MSC_VER) +# define BOOST_HAS_INT128 +#endif + + +// +// Dynamic shared object (DSO) and dynamic-link library (DLL) support +// +#if defined(_WIN32) || defined(__WIN32__) || defined(WIN32) || defined(__CYGWIN__) +# define BOOST_HAS_DECLSPEC +# define BOOST_SYMBOL_EXPORT __attribute__((__dllexport__)) +# define BOOST_SYMBOL_IMPORT __attribute__((__dllimport__)) +#else +# define BOOST_SYMBOL_EXPORT __attribute__((__visibility__("default"))) +# define BOOST_SYMBOL_VISIBLE __attribute__((__visibility__("default"))) +# define BOOST_SYMBOL_IMPORT +#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 + +// +// Currently clang on Windows using VC++ RTL does not support C++11's char16_t or char32_t +// +#if (defined(_MSC_VER) && (_MSC_VER < 1900)) || !(defined(__GXX_EXPERIMENTAL_CXX0X__) || __cplusplus >= 201103L) +# define BOOST_NO_CXX11_CHAR16_T +# define BOOST_NO_CXX11_CHAR32_T +#endif + +#if defined(_MSC_VER) && (_MSC_VER >= 1800) && !defined(__GNUC__) +#define BOOST_HAS_EXPM1 +#define BOOST_HAS_LOG1P +#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_reference_qualified_functions) +# define BOOST_NO_CXX11_REF_QUALIFIERS +#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) +# 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 + +#if !__has_feature(cxx_override_control) +# define BOOST_NO_CXX11_FINAL +#endif + +#if !(__has_feature(__cxx_binary_literals__) || __has_extension(__cxx_binary_literals__)) +# define BOOST_NO_CXX14_BINARY_LITERALS +#endif + +#if !__has_feature(__cxx_decltype_auto__) +# define BOOST_NO_CXX14_DECLTYPE_AUTO +#endif + +#if !__has_feature(__cxx_aggregate_nsdmi__) +# define BOOST_NO_CXX14_AGGREGATE_NSDMI +#endif + +#if !__has_feature(__cxx_init_captures__) +# define BOOST_NO_CXX14_INITIALIZED_LAMBDA_CAPTURES +#endif + +#if !__has_feature(__cxx_generic_lambdas__) +# define BOOST_NO_CXX14_GENERIC_LAMBDAS +#endif + +// clang < 3.5 has a defect with dependent type, like following. +// +// template <class T> +// constexpr typename enable_if<pred<T> >::type foo(T &) +// { } // error: no return statement in constexpr function +// +// This issue also affects C++11 mode, but C++11 constexpr requires return stmt. +// Therefore we don't care such case. +// +// Note that we can't check Clang version directly as the numbering system changes depending who's +// creating the Clang release (see https://github.com/boostorg/config/pull/39#issuecomment-59927873) +// so instead verify that we have a feature that was introduced at the same time as working C++14 +// constexpr (generic lambda's in this case): +// +#if !__has_feature(__cxx_generic_lambdas__) || !__has_feature(__cxx_relaxed_constexpr__) +# define BOOST_NO_CXX14_CONSTEXPR +#endif + +#if !__has_feature(__cxx_return_type_deduction__) +# define BOOST_NO_CXX14_RETURN_TYPE_DEDUCTION +#endif + +#if !__has_feature(__cxx_variable_templates__) +# define BOOST_NO_CXX14_VARIABLE_TEMPLATES +#endif + +#if !defined(__cpp_structured_bindings) || (__cpp_structured_bindings < 201606) +# define BOOST_NO_CXX17_STRUCTURED_BINDINGS +#endif + +#if !defined(__cpp_if_constexpr) || (__cpp_if_constexpr < 201606) +# define BOOST_NO_CXX17_IF_CONSTEXPR +#endif + +// Clang 3.9+ in c++1z +#if !__has_cpp_attribute(fallthrough) || __cplusplus < 201406L +# define BOOST_NO_CXX17_INLINE_VARIABLES +# define BOOST_NO_CXX17_FOLD_EXPRESSIONS +#endif + +#if __cplusplus < 201103L +#define BOOST_NO_CXX11_SFINAE_EXPR +#endif + +#if __cplusplus < 201400 +// All versions with __cplusplus above this value seem to support this: +# define BOOST_NO_CXX14_DIGIT_SEPARATORS +#endif +// +// __builtin_unreachable: +#if defined(__has_builtin) && __has_builtin(__builtin_unreachable) +#define BOOST_UNREACHABLE_RETURN(x) __builtin_unreachable(); +#endif + +#if (__clang_major__ == 3) && (__clang_minor__ == 0) +// Apparently a clang bug: +# define BOOST_NO_CXX11_FIXED_LENGTH_VARIADIC_TEMPLATE_EXPANSION_PACKS +#endif + +// Clang has supported the 'unused' attribute since the first release. +#define BOOST_ATTRIBUTE_UNUSED __attribute__((__unused__)) + +// Type aliasing hint. +#if __has_attribute(__may_alias__) +# define BOOST_MAY_ALIAS __attribute__((__may_alias__)) +#endif + +#ifndef BOOST_COMPILER +# define BOOST_COMPILER "Clang version " __clang_version__ +#endif + +// Macro used to identify the Clang compiler. +#define BOOST_CLANG 1 + |