1//===--- DemangleConfig.h --------------------------------------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7// This file is contains a subset of macros copied from
8// llvm/include/llvm/Demangle/DemangleConfig.h
9//===----------------------------------------------------------------------===//
10
11#ifndef LIBCXXABI_DEMANGLE_DEMANGLE_CONFIG_H
12#define LIBCXXABI_DEMANGLE_DEMANGLE_CONFIG_H
13
14#include <ciso646>
15
16#ifdef _MSC_VER
17// snprintf is implemented in VS 2015
18#if _MSC_VER < 1900
19#define snprintf _snprintf_s
20#endif
21#endif
22
23#ifndef __has_feature
24#define __has_feature(x) 0
25#endif
26
27#ifndef __has_cpp_attribute
28#define __has_cpp_attribute(x) 0
29#endif
30
31#ifndef __has_attribute
32#define __has_attribute(x) 0
33#endif
34
35#ifndef __has_builtin
36#define __has_builtin(x) 0
37#endif
38
39#ifndef DEMANGLE_GNUC_PREREQ
40#if defined(__GNUC__) && defined(__GNUC_MINOR__) && defined(__GNUC_PATCHLEVEL__)
41#define DEMANGLE_GNUC_PREREQ(maj, min, patch) \
42 ((__GNUC__ << 20) + (__GNUC_MINOR__ << 10) + __GNUC_PATCHLEVEL__ >= \
43 ((maj) << 20) + ((min) << 10) + (patch))
44#elif defined(__GNUC__) && defined(__GNUC_MINOR__)
45#define DEMANGLE_GNUC_PREREQ(maj, min, patch) \
46 ((__GNUC__ << 20) + (__GNUC_MINOR__ << 10) >= ((maj) << 20) + ((min) << 10))
47#else
48#define DEMANGLE_GNUC_PREREQ(maj, min, patch) 0
49#endif
50#endif
51
52#if __has_attribute(used) || DEMANGLE_GNUC_PREREQ(3, 1, 0)
53#define DEMANGLE_ATTRIBUTE_USED __attribute__((__used__))
54#else
55#define DEMANGLE_ATTRIBUTE_USED
56#endif
57
58#if __has_builtin(__builtin_unreachable) || DEMANGLE_GNUC_PREREQ(4, 5, 0)
59#define DEMANGLE_UNREACHABLE __builtin_unreachable()
60#elif defined(_MSC_VER)
61#define DEMANGLE_UNREACHABLE __assume(false)
62#else
63#define DEMANGLE_UNREACHABLE
64#endif
65
66#if __has_attribute(noinline) || DEMANGLE_GNUC_PREREQ(3, 4, 0)
67#define DEMANGLE_ATTRIBUTE_NOINLINE __attribute__((noinline))
68#elif defined(_MSC_VER)
69#define DEMANGLE_ATTRIBUTE_NOINLINE __declspec(noinline)
70#else
71#define DEMANGLE_ATTRIBUTE_NOINLINE
72#endif
73
74#if !defined(NDEBUG)
75#define DEMANGLE_DUMP_METHOD DEMANGLE_ATTRIBUTE_NOINLINE DEMANGLE_ATTRIBUTE_USED
76#else
77#define DEMANGLE_DUMP_METHOD DEMANGLE_ATTRIBUTE_NOINLINE
78#endif
79
80#if __cplusplus > 201402L && __has_cpp_attribute(fallthrough)
81#define DEMANGLE_FALLTHROUGH [[fallthrough]]
82#elif __has_cpp_attribute(gnu::fallthrough)
83#define DEMANGLE_FALLTHROUGH [[gnu::fallthrough]]
84#elif !__cplusplus
85// Workaround for llvm.org/PR23435, since clang 3.6 and below emit a spurious
86// error when __has_cpp_attribute is given a scoped attribute in C mode.
87#define DEMANGLE_FALLTHROUGH
88#elif __has_cpp_attribute(clang::fallthrough)
89#define DEMANGLE_FALLTHROUGH [[clang::fallthrough]]
90#else
91#define DEMANGLE_FALLTHROUGH
92#endif
93
94#define DEMANGLE_NAMESPACE_BEGIN namespace { namespace itanium_demangle {
95#define DEMANGLE_NAMESPACE_END } }
96
97#endif // LIBCXXABI_DEMANGLE_DEMANGLE_CONFIG_H
98