1 //===--- LangStandard.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 //===----------------------------------------------------------------------===//
8 
9 #ifndef LLVM_CLANG_BASIC_LANGSTANDARD_H
10 #define LLVM_CLANG_BASIC_LANGSTANDARD_H
11 
12 #include "clang/Basic/LLVM.h"
13 #include "llvm/ADT/StringRef.h"
14 
15 namespace llvm {
16 class Triple;
17 }
18 
19 namespace clang {
20 
21 /// The language for the input, used to select and validate the language
22 /// standard and possible actions.
23 enum class Language : uint8_t {
24   Unknown,
25 
26   /// Assembly: we accept this only so that we can preprocess it.
27   Asm,
28 
29   /// LLVM IR: we accept this so that we can run the optimizer on it,
30   /// and compile it to assembly or object code.
31   LLVM_IR,
32 
33   ///@{ Languages that the frontend can parse and compile.
34   C,
35   CXX,
36   ObjC,
37   ObjCXX,
38   OpenCL,
39   OpenCLCXX,
40   CUDA,
41   RenderScript,
42   HIP,
43   HLSL,
44   ///@}
45 };
46 
47 enum LangFeatures {
48   LineComment = (1 << 0),
49   C99 = (1 << 1),
50   C11 = (1 << 2),
51   C17 = (1 << 3),
52   C2x = (1 << 4),
53   CPlusPlus = (1 << 5),
54   CPlusPlus11 = (1 << 6),
55   CPlusPlus14 = (1 << 7),
56   CPlusPlus17 = (1 << 8),
57   CPlusPlus20 = (1 << 9),
58   CPlusPlus2b = (1 << 10),
59   Digraphs = (1 << 11),
60   GNUMode = (1 << 12),
61   HexFloat = (1 << 13),
62   OpenCL = (1 << 14),
63   HLSL = (1 << 15)
64 };
65 
66 /// LangStandard - Information about the properties of a particular language
67 /// standard.
68 struct LangStandard {
69   enum Kind {
70 #define LANGSTANDARD(id, name, lang, desc, features) \
71     lang_##id,
72 #include "clang/Basic/LangStandards.def"
73     lang_unspecified
74   };
75 
76   const char *ShortName;
77   const char *Description;
78   unsigned Flags;
79   clang::Language Language;
80 
81 public:
82   /// getName - Get the name of this standard.
getNameLangStandard83   const char *getName() const { return ShortName; }
84 
85   /// getDescription - Get the description of this standard.
getDescriptionLangStandard86   const char *getDescription() const { return Description; }
87 
88   /// Get the language that this standard describes.
getLanguageLangStandard89   clang::Language getLanguage() const { return Language; }
90 
91   /// Language supports '//' comments.
hasLineCommentsLangStandard92   bool hasLineComments() const { return Flags & LineComment; }
93 
94   /// isC99 - Language is a superset of C99.
isC99LangStandard95   bool isC99() const { return Flags & C99; }
96 
97   /// isC11 - Language is a superset of C11.
isC11LangStandard98   bool isC11() const { return Flags & C11; }
99 
100   /// isC17 - Language is a superset of C17.
isC17LangStandard101   bool isC17() const { return Flags & C17; }
102 
103   /// isC2x - Language is a superset of C2x.
isC2xLangStandard104   bool isC2x() const { return Flags & C2x; }
105 
106   /// isCPlusPlus - Language is a C++ variant.
isCPlusPlusLangStandard107   bool isCPlusPlus() const { return Flags & CPlusPlus; }
108 
109   /// isCPlusPlus11 - Language is a C++11 variant (or later).
isCPlusPlus11LangStandard110   bool isCPlusPlus11() const { return Flags & CPlusPlus11; }
111 
112   /// isCPlusPlus14 - Language is a C++14 variant (or later).
isCPlusPlus14LangStandard113   bool isCPlusPlus14() const { return Flags & CPlusPlus14; }
114 
115   /// isCPlusPlus17 - Language is a C++17 variant (or later).
isCPlusPlus17LangStandard116   bool isCPlusPlus17() const { return Flags & CPlusPlus17; }
117 
118   /// isCPlusPlus20 - Language is a C++20 variant (or later).
isCPlusPlus20LangStandard119   bool isCPlusPlus20() const { return Flags & CPlusPlus20; }
120 
121   /// isCPlusPlus2b - Language is a post-C++20 variant (or later).
isCPlusPlus2bLangStandard122   bool isCPlusPlus2b() const { return Flags & CPlusPlus2b; }
123 
124   /// hasDigraphs - Language supports digraphs.
hasDigraphsLangStandard125   bool hasDigraphs() const { return Flags & Digraphs; }
126 
127   /// isGNUMode - Language includes GNU extensions.
isGNUModeLangStandard128   bool isGNUMode() const { return Flags & GNUMode; }
129 
130   /// hasHexFloats - Language supports hexadecimal float constants.
hasHexFloatsLangStandard131   bool hasHexFloats() const { return Flags & HexFloat; }
132 
133   /// isOpenCL - Language is a OpenCL variant.
isOpenCLLangStandard134   bool isOpenCL() const { return Flags & OpenCL; }
135 
136   static Kind getLangKind(StringRef Name);
137   static const LangStandard &getLangStandardForKind(Kind K);
138   static const LangStandard *getLangStandardForName(StringRef Name);
139 };
140 
141 LangStandard::Kind getDefaultLanguageStandard(clang::Language Lang,
142                                               const llvm::Triple &T);
143 
144 }  // end namespace clang
145 
146 #endif
147