Ruby: include/ruby/internal/has/cpp_attribute.h Source File

Ruby 3.2.5p208 (2024-07-26 revision 31d0f1a2e7dbfb60731d1f05b868e1d578cda493)

cpp_attribute.h
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1#ifndef RBIMPL_HAS_CPP_ATTRIBUTE_H /*-*-C++-*-vi:se ft=cpp:*/
2#define RBIMPL_HAS_CPP_ATTRIBUTE_H
23#include "ruby/internal/compiler_is.h"
24#include "ruby/internal/compiler_since.h"
25
27#if RBIMPL_COMPILER_IS(SunPro)
28# /* Oracle Developer Studio 12.5's C++ preprocessor is reportedly broken. We
29# * could simulate __has_cpp_attribute like below, but don't know the exact
30# * list of which version supported which attribute. Just kill everything for
31# * now. If you can please :FIXME: */
32# /* https://unicode-org.atlassian.net/browse/ICU-12893 */
33# /* https://github.com/boostorg/config/pull/95 */
34# define RBIMPL_HAS_CPP_ATTRIBUTE0(_) 0
35
36#elif defined(__has_cpp_attribute)
37# define RBIMPL_HAS_CPP_ATTRIBUTE0(_) __has_cpp_attribute(_)
38
39#elif RBIMPL_COMPILER_IS(MSVC)
40# /* MSVC has never updated its __cplusplus since forever (unless specified
41# * explicitly by a compiler flag). They also lack __has_cpp_attribute until
42# * 2019. However, they do have attributes since 2015 or so. */
43# /* https://docs.microsoft.com/en-us/cpp/overview/visual-cpp-language-conformance */
44# define RBIMPL_HAS_CPP_ATTRIBUTE0(_) (RBIMPL_HAS_CPP_ATTRIBUTE_ ## _)
45# define RBIMPL_HAS_CPP_ATTRIBUTE_noreturn 200809 * RBIMPL_COMPILER_SINCE(MSVC, 19, 00, 0)
46# define RBIMPL_HAS_CPP_ATTRIBUTE_carries_dependency 200809 * RBIMPL_COMPILER_SINCE(MSVC, 19, 00, 0)
47# define RBIMPL_HAS_CPP_ATTRIBUTE_deprecated 201309 * RBIMPL_COMPILER_SINCE(MSVC, 19, 10, 0)
48# define RBIMPL_HAS_CPP_ATTRIBUTE_fallthrough 201603 * RBIMPL_COMPILER_SINCE(MSVC, 19, 10, 0)
49# define RBIMPL_HAS_CPP_ATTRIBUTE_maybe_unused 201603 * RBIMPL_COMPILER_SINCE(MSVC, 19, 11, 0)
50# define RBIMPL_HAS_CPP_ATTRIBUTE_nodiscard 201603 * RBIMPL_COMPILER_SINCE(MSVC, 19, 11, 0)
51
52#elif RBIMPL_COMPILER_BEFORE(Clang, 3, 6, 0)
53# /* Clang 3.6.0 introduced __has_cpp_attribute. Prior to that following
54# * attributes were already there. */
55# /* https://clang.llvm.org/cxx_status.html */
56# define RBIMPL_HAS_CPP_ATTRIBUTE0(_) (RBIMPL_HAS_CPP_ATTRIBUTE_ ## _)
57# define RBIMPL_HAS_CPP_ATTRIBUTE_noreturn 200809 * RBIMPL_COMPILER_SINCE(Clang, 3, 3, 0)
58# define RBIMPL_HAS_CPP_ATTRIBUTE_deprecated 201309 * RBIMPL_COMPILER_SINCE(Clang, 3, 4, 0)
59
60#elif RBIMPL_COMPILER_BEFORE(GCC, 5, 0, 0)
61# /* GCC 5+ have __has_cpp_attribute, while 4.x had following attributes. */
62# /* https://gcc.gnu.org/projects/cxx-status.html */
63# define RBIMPL_HAS_CPP_ATTRIBUTE0(_) (RBIMPL_HAS_CPP_ATTRIBUTE_ ## _)
64# define RBIMPL_HAS_CPP_ATTRIBUTE_noreturn 200809 * RBIMPL_COMPILER_SINCE(GCC, 4, 8, 0)
65# define RBIMPL_HAS_CPP_ATTRIBUTE_deprecated 201309 * RBIMPL_COMPILER_SINCE(GCC, 4, 9, 0)
66
67#else
68# /* :FIXME:
69# * Candidate compilers to list here:
70# * - icpc: They have __INTEL_CXX11_MODE__.
71# */
72# define RBIMPL_HAS_CPP_ATTRIBUTE0(_) 0
73#endif
77#if ! defined(__cplusplus)
78# /* Makes no sense. */
79# define RBIMPL_HAS_CPP_ATTRIBUTE(_) 0
80#else
81# /* GCC needs workarounds. See https://gcc.godbolt.org/z/jdz3pa */
82# define RBIMPL_HAS_CPP_ATTRIBUTE(_) \
83 ((RBIMPL_HAS_CPP_ATTRIBUTE0(_) <= __cplusplus) ? RBIMPL_HAS_CPP_ATTRIBUTE0(_) : 0)
84#endif
85
86#endif /* RBIMPL_HAS_CPP_ATTRIBUTE_H */
compiler_is.h
Defines RBIMPL_COMPILER_IS.
compiler_since.h
Defines RBIMPL_COMPILER_SINCE.