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   Digraphs = (1 << 10),
53   GNUMode = (1 << 11),
54   HexFloat = (1 << 12),
55   ImplicitInt = (1 << 13),
56   OpenCL = (1 << 14)
57 };
58 
59 /// LangStandard - Information about the properties of a particular language
60 /// standard.
61 struct LangStandard {
62   enum Kind {
63 #define LANGSTANDARD(id, name, lang, desc, features) \
64     lang_##id,
65 #include "clang/Basic/LangStandards.def"
66     lang_unspecified
67   };
68 
69   const char *ShortName;
70   const char *Description;
71   unsigned Flags;
72   clang::Language Language;
73 
74 public:
75   /// getName - Get the name of this standard.
76   const char *getName() const { return ShortName; }
77 
78   /// getDescription - Get the description of this standard.
79   const char *getDescription() const { return Description; }
80 
81   /// Get the language that this standard describes.
82   clang::Language getLanguage() const { return Language; }
83 
84   /// Language supports '//' comments.
85   bool hasLineComments() const { return Flags & LineComment; }
86 
87   /// isC99 - Language is a superset of C99.
88   bool isC99() const { return Flags & C99; }
89 
90   /// isC11 - Language is a superset of C11.
91   bool isC11() const { return Flags & C11; }
92 
93   /// isC17 - Language is a superset of C17.
94   bool isC17() const { return Flags & C17; }
95 
96   /// isC2x - Language is a superset of C2x.
97   bool isC2x() const { return Flags & C2x; }
98 
99   /// isCPlusPlus - Language is a C++ variant.
100   bool isCPlusPlus() const { return Flags & CPlusPlus; }
101 
102   /// isCPlusPlus11 - Language is a C++11 variant (or later).
103   bool isCPlusPlus11() const { return Flags & CPlusPlus11; }
104 
105   /// isCPlusPlus14 - Language is a C++14 variant (or later).
106   bool isCPlusPlus14() const { return Flags & CPlusPlus14; }
107 
108   /// isCPlusPlus17 - Language is a C++17 variant (or later).
109   bool isCPlusPlus17() const { return Flags & CPlusPlus17; }
110 
111   /// isCPlusPlus20 - Language is a C++20 variant (or later).
112   bool isCPlusPlus20() const { return Flags & CPlusPlus20; }
113 
114   /// hasDigraphs - Language supports digraphs.
115   bool hasDigraphs() const { return Flags & Digraphs; }
116 
117   /// isGNUMode - Language includes GNU extensions.
118   bool isGNUMode() const { return Flags & GNUMode; }
119 
120   /// hasHexFloats - Language supports hexadecimal float constants.
121   bool hasHexFloats() const { return Flags & HexFloat; }
122 
123   /// hasImplicitInt - Language allows variables to be typed as int implicitly.
124   bool hasImplicitInt() const { return Flags & ImplicitInt; }
125 
126   /// isOpenCL - Language is a OpenCL variant.
127   bool isOpenCL() const { return Flags & OpenCL; }
128 
129   static Kind getLangKind(StringRef Name);
130   static const LangStandard &getLangStandardForKind(Kind K);
131   static const LangStandard *getLangStandardForName(StringRef Name);
132 };
133 
134 }  // end namespace clang
135 
136 #endif
137