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 clang {
16 
17 /// The language for the input, used to select and validate the language
18 /// standard and possible actions.
19 enum class Language : uint8_t {
20   Unknown,
21 
22   /// Assembly: we accept this only so that we can preprocess it.
23   Asm,
24 
25   /// LLVM IR: we accept this so that we can run the optimizer on it,
26   /// and compile it to assembly or object code.
27   LLVM_IR,
28 
29   ///@{ Languages that the frontend can parse and compile.
30   C,
31   CXX,
32   ObjC,
33   ObjCXX,
34   OpenCL,
35   CUDA,
36   RenderScript,
37   HIP,
38   ///@}
39 };
40 
41 enum LangFeatures {
42   LineComment = (1 << 0),
43   C99 = (1 << 1),
44   C11 = (1 << 2),
45   C17 = (1 << 3),
46   C2x = (1 << 4),
47   CPlusPlus = (1 << 5),
48   CPlusPlus11 = (1 << 6),
49   CPlusPlus14 = (1 << 7),
50   CPlusPlus17 = (1 << 8),
51   CPlusPlus20 = (1 << 9),
52   CPlusPlus2b = (1 << 10),
53   Digraphs = (1 << 11),
54   GNUMode = (1 << 12),
55   HexFloat = (1 << 13),
56   ImplicitInt = (1 << 14),
57   OpenCL = (1 << 15)
58 };
59 
60 /// LangStandard - Information about the properties of a particular language
61 /// standard.
62 struct LangStandard {
63   enum Kind {
64 #define LANGSTANDARD(id, name, lang, desc, features) \
65     lang_##id,
66 #include "clang/Basic/LangStandards.def"
67     lang_unspecified
68   };
69 
70   const char *ShortName;
71   const char *Description;
72   unsigned Flags;
73   clang::Language Language;
74 
75 public:
76   /// getName - Get the name of this standard.
getNameLangStandard77   const char *getName() const { return ShortName; }
78 
79   /// getDescription - Get the description of this standard.
getDescriptionLangStandard80   const char *getDescription() const { return Description; }
81 
82   /// Get the language that this standard describes.
getLanguageLangStandard83   clang::Language getLanguage() const { return Language; }
84 
85   /// Language supports '//' comments.
hasLineCommentsLangStandard86   bool hasLineComments() const { return Flags & LineComment; }
87 
88   /// isC99 - Language is a superset of C99.
isC99LangStandard89   bool isC99() const { return Flags & C99; }
90 
91   /// isC11 - Language is a superset of C11.
isC11LangStandard92   bool isC11() const { return Flags & C11; }
93 
94   /// isC17 - Language is a superset of C17.
isC17LangStandard95   bool isC17() const { return Flags & C17; }
96 
97   /// isC2x - Language is a superset of C2x.
isC2xLangStandard98   bool isC2x() const { return Flags & C2x; }
99 
100   /// isCPlusPlus - Language is a C++ variant.
isCPlusPlusLangStandard101   bool isCPlusPlus() const { return Flags & CPlusPlus; }
102 
103   /// isCPlusPlus11 - Language is a C++11 variant (or later).
isCPlusPlus11LangStandard104   bool isCPlusPlus11() const { return Flags & CPlusPlus11; }
105 
106   /// isCPlusPlus14 - Language is a C++14 variant (or later).
isCPlusPlus14LangStandard107   bool isCPlusPlus14() const { return Flags & CPlusPlus14; }
108 
109   /// isCPlusPlus17 - Language is a C++17 variant (or later).
isCPlusPlus17LangStandard110   bool isCPlusPlus17() const { return Flags & CPlusPlus17; }
111 
112   /// isCPlusPlus20 - Language is a C++20 variant (or later).
isCPlusPlus20LangStandard113   bool isCPlusPlus20() const { return Flags & CPlusPlus20; }
114 
115   /// isCPlusPlus2b - Language is a post-C++20 variant (or later).
isCPlusPlus2bLangStandard116   bool isCPlusPlus2b() const { return Flags & CPlusPlus2b; }
117 
118   /// hasDigraphs - Language supports digraphs.
hasDigraphsLangStandard119   bool hasDigraphs() const { return Flags & Digraphs; }
120 
121   /// isGNUMode - Language includes GNU extensions.
isGNUModeLangStandard122   bool isGNUMode() const { return Flags & GNUMode; }
123 
124   /// hasHexFloats - Language supports hexadecimal float constants.
hasHexFloatsLangStandard125   bool hasHexFloats() const { return Flags & HexFloat; }
126 
127   /// hasImplicitInt - Language allows variables to be typed as int implicitly.
hasImplicitIntLangStandard128   bool hasImplicitInt() const { return Flags & ImplicitInt; }
129 
130   /// isOpenCL - Language is a OpenCL variant.
isOpenCLLangStandard131   bool isOpenCL() const { return Flags & OpenCL; }
132 
133   static Kind getLangKind(StringRef Name);
134   static const LangStandard &getLangStandardForKind(Kind K);
135   static const LangStandard *getLangStandardForName(StringRef Name);
136 };
137 
138 }  // end namespace clang
139 
140 #endif
141