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 /// \brief 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 /// \brief Represents a version number in the form major[.minor[.subminor]]. 26 class VersionTuple { 27 unsigned Major; 28 unsigned Minor : 31; 29 unsigned Subminor : 31; 30 unsigned HasMinor : 1; 31 unsigned HasSubminor : 1; 32 33 public: 34 VersionTuple() 35 : Major(0), Minor(0), Subminor(0), HasMinor(false), HasSubminor(false) { } 36 37 explicit VersionTuple(unsigned Major) 38 : Major(Major), Minor(0), Subminor(0), HasMinor(false), HasSubminor(false) 39 { } 40 41 explicit VersionTuple(unsigned Major, unsigned Minor) 42 : Major(Major), Minor(Minor), Subminor(0), HasMinor(true), 43 HasSubminor(false) 44 { } 45 46 explicit VersionTuple(unsigned Major, unsigned Minor, unsigned Subminor) 47 : Major(Major), Minor(Minor), Subminor(Subminor), HasMinor(true), 48 HasSubminor(true) 49 { } 50 51 /// \brief Determine whether this version information is empty 52 /// (e.g., all version components are zero). 53 bool empty() const { return Major == 0 && Minor == 0 && Subminor == 0; } 54 55 /// \brief Retrieve the major version number. 56 unsigned getMajor() const { return Major; } 57 58 /// \brief Retrieve the minor version number, if provided. 59 Optional<unsigned> getMinor() const { 60 if (!HasMinor) 61 return None; 62 return Minor; 63 } 64 65 /// \brief Retrieve the subminor version number, if provided. 66 Optional<unsigned> getSubminor() const { 67 if (!HasSubminor) 68 return None; 69 return Subminor; 70 } 71 72 /// \brief Determine if two version numbers are equivalent. If not 73 /// provided, minor and subminor version numbers are considered to be zero. 74 friend bool operator==(const VersionTuple& X, const VersionTuple &Y) { 75 return X.Major == Y.Major && X.Minor == Y.Minor && X.Subminor == Y.Subminor; 76 } 77 78 /// \brief Determine if two version numbers are not equivalent. 79 /// 80 /// If not provided, minor and subminor version numbers are considered to be 81 /// zero. 82 friend bool operator!=(const VersionTuple &X, const VersionTuple &Y) { 83 return !(X == Y); 84 } 85 86 /// \brief Determine whether one version number precedes another. 87 /// 88 /// If not provided, minor and subminor version numbers are considered to be 89 /// zero. 90 friend bool operator<(const VersionTuple &X, const VersionTuple &Y) { 91 return std::tie(X.Major, X.Minor, X.Subminor) < 92 std::tie(Y.Major, Y.Minor, Y.Subminor); 93 } 94 95 /// \brief Determine whether one version number follows another. 96 /// 97 /// If not provided, minor and subminor version numbers are considered to be 98 /// zero. 99 friend bool operator>(const VersionTuple &X, const VersionTuple &Y) { 100 return Y < X; 101 } 102 103 /// \brief Determine whether one version number precedes or is 104 /// equivalent to another. 105 /// 106 /// If not provided, minor and subminor version numbers are considered to be 107 /// zero. 108 friend bool operator<=(const VersionTuple &X, const VersionTuple &Y) { 109 return !(Y < X); 110 } 111 112 /// \brief Determine whether one version number follows or is 113 /// equivalent to another. 114 /// 115 /// If not provided, minor and subminor version numbers are considered to be 116 /// zero. 117 friend bool operator>=(const VersionTuple &X, const VersionTuple &Y) { 118 return !(X < Y); 119 } 120 121 /// \brief Retrieve a string representation of the version number. 122 std::string getAsString() const; 123 124 /// \brief Try to parse the given string as a version number. 125 /// \returns \c true if the string does not match the regular expression 126 /// [0-9]+(\.[0-9]+(\.[0-9]+)) 127 bool tryParse(StringRef string); 128 }; 129 130 /// \brief Print a version number. 131 raw_ostream& operator<<(raw_ostream &Out, const VersionTuple &V); 132 133 } // end namespace clang 134 #endif // LLVM_CLANG_BASIC_VERSIONTUPLE_H 135
