clang  7.0.0svn
VersionTuple.h
Go to the documentation of this file.
1 //===- VersionTuple.h - Version Number Handling -----------------*- C++ -*-===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 ///
10 /// \file
11 /// Defines the clang::VersionTuple class, which represents a version in
12 /// the form major[.minor[.subminor]].
13 ///
14 //===----------------------------------------------------------------------===//
15 #ifndef LLVM_CLANG_BASIC_VERSIONTUPLE_H
16 #define LLVM_CLANG_BASIC_VERSIONTUPLE_H
17 
18 #include "clang/Basic/LLVM.h"
19 #include "llvm/ADT/Optional.h"
20 #include <string>
21 #include <tuple>
22 
23 namespace clang {
24 
25 /// Represents a version number in the form major[.minor[.subminor[.build]]].
26 class VersionTuple {
27  unsigned Major : 32;
28 
29  unsigned Minor : 31;
30  unsigned HasMinor : 1;
31 
32  unsigned Subminor : 31;
33  unsigned HasSubminor : 1;
34 
35  unsigned Build : 31;
36  unsigned HasBuild : 1;
37 
38 public:
40  : Major(0), Minor(0), HasMinor(false), Subminor(0), HasSubminor(false),
41  Build(0), HasBuild(false) {}
42 
43  explicit VersionTuple(unsigned Major)
44  : Major(Major), Minor(0), HasMinor(false), Subminor(0),
45  HasSubminor(false), Build(0), HasBuild(false) {}
46 
47  explicit VersionTuple(unsigned Major, unsigned Minor)
48  : Major(Major), Minor(Minor), HasMinor(true), Subminor(0),
49  HasSubminor(false), Build(0), HasBuild(false) {}
50 
51  explicit VersionTuple(unsigned Major, unsigned Minor, unsigned Subminor)
52  : Major(Major), Minor(Minor), HasMinor(true), Subminor(Subminor),
53  HasSubminor(true), Build(0), HasBuild(false) {}
54 
55  explicit VersionTuple(unsigned Major, unsigned Minor, unsigned Subminor,
56  unsigned Build)
57  : Major(Major), Minor(Minor), HasMinor(true), Subminor(Subminor),
58  HasSubminor(true), Build(Build), HasBuild(true) {}
59 
60  /// Determine whether this version information is empty
61  /// (e.g., all version components are zero).
62  bool empty() const {
63  return Major == 0 && Minor == 0 && Subminor == 0 && Build == 0;
64  }
65 
66  /// Retrieve the major version number.
67  unsigned getMajor() const { return Major; }
68 
69  /// Retrieve the minor version number, if provided.
71  if (!HasMinor)
72  return None;
73  return Minor;
74  }
75 
76  /// Retrieve the subminor version number, if provided.
78  if (!HasSubminor)
79  return None;
80  return Subminor;
81  }
82 
83  /// Retrieve the build version number, if provided.
85  if (!HasBuild)
86  return None;
87  return Build;
88  }
89 
90  /// Determine if two version numbers are equivalent. If not
91  /// provided, minor and subminor version numbers are considered to be zero.
92  friend bool operator==(const VersionTuple& X, const VersionTuple &Y) {
93  return X.Major == Y.Major && X.Minor == Y.Minor &&
94  X.Subminor == Y.Subminor && X.Build == Y.Build;
95  }
96 
97  /// Determine if two version numbers are not equivalent.
98  ///
99  /// If not provided, minor and subminor version numbers are considered to be
100  /// zero.
101  friend bool operator!=(const VersionTuple &X, const VersionTuple &Y) {
102  return !(X == Y);
103  }
104 
105  /// Determine whether one version number precedes another.
106  ///
107  /// If not provided, minor and subminor version numbers are considered to be
108  /// zero.
109  friend bool operator<(const VersionTuple &X, const VersionTuple &Y) {
110  return std::tie(X.Major, X.Minor, X.Subminor, X.Build) <
111  std::tie(Y.Major, Y.Minor, Y.Subminor, Y.Build);
112  }
113 
114  /// Determine whether one version number follows another.
115  ///
116  /// If not provided, minor and subminor version numbers are considered to be
117  /// zero.
118  friend bool operator>(const VersionTuple &X, const VersionTuple &Y) {
119  return Y < X;
120  }
121 
122  /// Determine whether one version number precedes or is
123  /// equivalent to another.
124  ///
125  /// If not provided, minor and subminor version numbers are considered to be
126  /// zero.
127  friend bool operator<=(const VersionTuple &X, const VersionTuple &Y) {
128  return !(Y < X);
129  }
130 
131  /// Determine whether one version number follows or is
132  /// equivalent to another.
133  ///
134  /// If not provided, minor and subminor version numbers are considered to be
135  /// zero.
136  friend bool operator>=(const VersionTuple &X, const VersionTuple &Y) {
137  return !(X < Y);
138  }
139 
140  /// Retrieve a string representation of the version number.
141  std::string getAsString() const;
142 
143  /// Try to parse the given string as a version number.
144  /// \returns \c true if the string does not match the regular expression
145  /// [0-9]+(\.[0-9]+){0,3}
146  bool tryParse(StringRef string);
147 };
148 
149 /// Print a version number.
150 raw_ostream& operator<<(raw_ostream &Out, const VersionTuple &V);
151 
152 } // end namespace clang
153 #endif // LLVM_CLANG_BASIC_VERSIONTUPLE_H
friend bool operator>(const VersionTuple &X, const VersionTuple &Y)
Determine whether one version number follows another.
Definition: VersionTuple.h:118
Optional< unsigned > getBuild() const
Retrieve the build version number, if provided.
Definition: VersionTuple.h:84
Represents a version number in the form major[.minor[.subminor[.build]]].
Definition: VersionTuple.h:26
const DiagnosticBuilder & operator<<(const DiagnosticBuilder &DB, const Attr *At)
Definition: Attr.h:322
VersionTuple(unsigned Major, unsigned Minor, unsigned Subminor)
Definition: VersionTuple.h:51
Forward-declares and imports various common LLVM datatypes that clang wants to use unqualified...
VersionTuple(unsigned Major)
Definition: VersionTuple.h:43
friend bool operator==(const VersionTuple &X, const VersionTuple &Y)
Determine if two version numbers are equivalent.
Definition: VersionTuple.h:92
Optional< unsigned > getMinor() const
Retrieve the minor version number, if provided.
Definition: VersionTuple.h:70
friend bool operator!=(const VersionTuple &X, const VersionTuple &Y)
Determine if two version numbers are not equivalent.
Definition: VersionTuple.h:101
friend bool operator>=(const VersionTuple &X, const VersionTuple &Y)
Determine whether one version number follows or is equivalent to another.
Definition: VersionTuple.h:136
bool empty() const
Determine whether this version information is empty (e.g., all version components are zero)...
Definition: VersionTuple.h:62
VersionTuple(unsigned Major, unsigned Minor)
Definition: VersionTuple.h:47
#define false
Definition: stdbool.h:33
Dataflow Directional Tag Classes.
Optional< unsigned > getSubminor() const
Retrieve the subminor version number, if provided.
Definition: VersionTuple.h:77
bool tryParse(StringRef string)
Try to parse the given string as a version number.
unsigned getMajor() const
Retrieve the major version number.
Definition: VersionTuple.h:67
std::string getAsString() const
Retrieve a string representation of the version number.
X
Add a minimal nested name specifier fixit hint to allow lookup of a tag name from an outer enclosing ...
Definition: SemaDecl.cpp:13462
VersionTuple(unsigned Major, unsigned Minor, unsigned Subminor, unsigned Build)
Definition: VersionTuple.h:55
friend bool operator<(const VersionTuple &X, const VersionTuple &Y)
Determine whether one version number precedes another.
Definition: VersionTuple.h:109
friend bool operator<=(const VersionTuple &X, const VersionTuple &Y)
Determine whether one version number precedes or is equivalent to another.
Definition: VersionTuple.h:127
#define true
Definition: stdbool.h:32