1 //===--- LangStandards.cpp - Language Standard Definitions ----------------===//
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 //===----------------------------------------------------------------------===//
8 
9 #include "clang/Basic/LangStandard.h"
10 #include "clang/Config/config.h"
11 #include "llvm/ADT/StringSwitch.h"
12 #include "llvm/ADT/Triple.h"
13 #include "llvm/Support/ErrorHandling.h"
14 using namespace clang;
15 
16 #define LANGSTANDARD(id, name, lang, desc, features)                           \
17   static const LangStandard Lang_##id = {name, desc, features, Language::lang};
18 #include "clang/Basic/LangStandards.def"
19 
20 const LangStandard &LangStandard::getLangStandardForKind(Kind K) {
21   switch (K) {
22   case lang_unspecified:
23     llvm::report_fatal_error("getLangStandardForKind() on unspecified kind");
24 #define LANGSTANDARD(id, name, lang, desc, features) \
25     case lang_##id: return Lang_##id;
26 #include "clang/Basic/LangStandards.def"
27   }
28   llvm_unreachable("Invalid language kind!");
29 }
30 
31 LangStandard::Kind LangStandard::getLangKind(StringRef Name) {
32   return llvm::StringSwitch<Kind>(Name)
33 #define LANGSTANDARD(id, name, lang, desc, features) .Case(name, lang_##id)
34 #define LANGSTANDARD_ALIAS(id, alias) .Case(alias, lang_##id)
35 #include "clang/Basic/LangStandards.def"
36       .Default(lang_unspecified);
37 }
38 
39 const LangStandard *LangStandard::getLangStandardForName(StringRef Name) {
40   Kind K = getLangKind(Name);
41   if (K == lang_unspecified)
42     return nullptr;
43 
44   return &getLangStandardForKind(K);
45 }
46 
47 LangStandard::Kind clang::getDefaultLanguageStandard(clang::Language Lang,
48                                                      const llvm::Triple &T) {
49   switch (Lang) {
50   case Language::Unknown:
51   case Language::LLVM_IR:
52     llvm_unreachable("Invalid input kind!");
53   case Language::OpenCL:
54     return LangStandard::lang_opencl12;
55   case Language::OpenCLCXX:
56     return LangStandard::lang_openclcpp10;
57   case Language::CUDA:
58     return LangStandard::lang_cuda;
59   case Language::Asm:
60   case Language::C:
61     if (CLANG_DEFAULT_STD_C != LangStandard::lang_unspecified)
62       return CLANG_DEFAULT_STD_C;
63 
64     // The PS4 uses C99 as the default C standard.
65     if (T.isPS4())
66       return LangStandard::lang_gnu99;
67     return LangStandard::lang_gnu17;
68   case Language::ObjC:
69     if (CLANG_DEFAULT_STD_C != LangStandard::lang_unspecified)
70       return CLANG_DEFAULT_STD_C;
71 
72     return LangStandard::lang_gnu11;
73   case Language::CXX:
74   case Language::ObjCXX:
75     if (CLANG_DEFAULT_STD_CXX != LangStandard::lang_unspecified)
76       return CLANG_DEFAULT_STD_CXX;
77 
78     if (T.isDriverKit())
79       return LangStandard::lang_gnucxx17;
80     else
81       return LangStandard::lang_gnucxx14;
82   case Language::RenderScript:
83     return LangStandard::lang_c99;
84   case Language::HIP:
85     return LangStandard::lang_hip;
86   case Language::HLSL:
87     return LangStandard::lang_hlsl2021;
88   }
89   llvm_unreachable("unhandled Language kind!");
90 }
91