LangStandard.h revision 360784 
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
15namespace clang {
16
17/// The language for the input, used to select and validate the language
18/// standard and possible actions.
19enum 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
41enum 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  CPlusPlus2a = (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.
61struct 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
74public:
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  /// isCPlusPlus2a - Language is a post-C++17 variant (or later).
112  bool isCPlusPlus2a() const { return Flags & CPlusPlus2a; }
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