139 lines
4.3 KiB
C++
139 lines
4.3 KiB
C++
//===- VersionTuple.h - Version Number Handling -----------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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///
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/// \file
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/// \brief Defines the clang::VersionTuple class, which represents a version in
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/// the form major[.minor[.subminor]].
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///
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CLANG_BASIC_VERSIONTUPLE_H
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#define LLVM_CLANG_BASIC_VERSIONTUPLE_H
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#include "clang/Basic/LLVM.h"
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#include "llvm/ADT/Optional.h"
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#include <string>
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namespace clang {
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/// \brief Represents a version number in the form major[.minor[.subminor]].
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class VersionTuple {
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unsigned Major;
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unsigned Minor : 31;
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unsigned Subminor : 31;
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unsigned HasMinor : 1;
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unsigned HasSubminor : 1;
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public:
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VersionTuple()
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: Major(0), Minor(0), Subminor(0), HasMinor(false), HasSubminor(false) { }
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explicit VersionTuple(unsigned Major)
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: Major(Major), Minor(0), Subminor(0), HasMinor(false), HasSubminor(false)
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{ }
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explicit VersionTuple(unsigned Major, unsigned Minor)
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: Major(Major), Minor(Minor), Subminor(0), HasMinor(true),
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HasSubminor(false)
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{ }
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explicit VersionTuple(unsigned Major, unsigned Minor, unsigned Subminor)
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: Major(Major), Minor(Minor), Subminor(Subminor), HasMinor(true),
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HasSubminor(true)
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{ }
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/// \brief Determine whether this version information is empty
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/// (e.g., all version components are zero).
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bool empty() const { return Major == 0 && Minor == 0 && Subminor == 0; }
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/// \brief Retrieve the major version number.
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unsigned getMajor() const { return Major; }
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/// \brief Retrieve the minor version number, if provided.
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Optional<unsigned> getMinor() const {
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if (!HasMinor)
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return None;
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return Minor;
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}
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/// \brief Retrieve the subminor version number, if provided.
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Optional<unsigned> getSubminor() const {
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if (!HasSubminor)
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return None;
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return Subminor;
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}
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/// \brief Determine if two version numbers are equivalent. If not
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/// provided, minor and subminor version numbers are considered to be zero.
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friend bool operator==(const VersionTuple& X, const VersionTuple &Y) {
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return X.Major == Y.Major && X.Minor == Y.Minor && X.Subminor == Y.Subminor;
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}
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/// \brief Determine if two version numbers are not equivalent.
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///
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/// If not provided, minor and subminor version numbers are considered to be
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/// zero.
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friend bool operator!=(const VersionTuple &X, const VersionTuple &Y) {
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return !(X == Y);
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}
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/// \brief Determine whether one version number precedes another.
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///
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/// If not provided, minor and subminor version numbers are considered to be
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/// zero.
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friend bool operator<(const VersionTuple &X, const VersionTuple &Y) {
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if (X.Major != Y.Major)
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return X.Major < Y.Major;
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if (X.Minor != Y.Minor)
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return X.Minor < Y.Minor;
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return X.Subminor < Y.Subminor;
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}
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/// \brief Determine whether one version number follows another.
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///
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/// If not provided, minor and subminor version numbers are considered to be
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/// zero.
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friend bool operator>(const VersionTuple &X, const VersionTuple &Y) {
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return Y < X;
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}
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/// \brief Determine whether one version number precedes or is
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/// equivalent to another.
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///
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/// If not provided, minor and subminor version numbers are considered to be
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/// zero.
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friend bool operator<=(const VersionTuple &X, const VersionTuple &Y) {
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return !(Y < X);
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}
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/// \brief Determine whether one version number follows or is
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/// equivalent to another.
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///
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/// If not provided, minor and subminor version numbers are considered to be
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/// zero.
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friend bool operator>=(const VersionTuple &X, const VersionTuple &Y) {
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return !(X < Y);
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}
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/// \brief Retrieve a string representation of the version number.
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std::string getAsString() const;
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/// \brief Try to parse the given string as a version number.
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/// \returns \c true if the string does not match the regular expression
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/// [0-9]+(\.[0-9]+(\.[0-9]+))
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bool tryParse(StringRef string);
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};
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/// \brief Print a version number.
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raw_ostream& operator<<(raw_ostream &Out, const VersionTuple &V);
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} // end namespace clang
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#endif // LLVM_CLANG_BASIC_VERSIONTUPLE_H
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