1//===--- Availability.h - Classes for availability --------------*- 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// This files defines some classes that implement availability checking. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LLVM_CLANG_AST_AVAILABILITY_H 15#define LLVM_CLANG_AST_AVAILABILITY_H 16 17#include "clang/Basic/SourceLocation.h" 18#include "clang/Basic/VersionTuple.h" 19#include "llvm/ADT/StringRef.h" 20 21namespace clang { 22 23/// \brief One specifier in an @available expression. 24/// 25/// \code 26/// @available(macos 10.10, *) 27/// \endcode 28/// 29/// Here, 'macos 10.10' and '*' both map to an instance of this type. 30/// 31class AvailabilitySpec { 32 /// Represents the version that this specifier requires. If the host OS 33 /// version is greater than or equal to Version, the @available will evaluate 34 /// to true. 35 VersionTuple Version; 36 37 /// Name of the platform that Version corresponds to. 38 StringRef Platform; 39 40 SourceLocation BeginLoc, EndLoc; 41 42public: 43 AvailabilitySpec(VersionTuple Version, StringRef Platform, 44 SourceLocation BeginLoc, SourceLocation EndLoc) 45 : Version(Version), Platform(Platform), BeginLoc(BeginLoc), 46 EndLoc(EndLoc) {} 47 48 /// This constructor is used when representing the '*' case. 49 AvailabilitySpec(SourceLocation StarLoc) 50 : BeginLoc(StarLoc), EndLoc(StarLoc) {} 51 52 VersionTuple getVersion() const { return Version; } 53 StringRef getPlatform() const { return Platform; } 54 SourceLocation getBeginLoc() const { return BeginLoc; } 55 SourceLocation getEndLoc() const { return EndLoc; } 56 57 /// Returns true when this represents the '*' case. 58 bool isOtherPlatformSpec() const { return Version.empty(); } 59}; 60 61} // end namespace clang 62 63#endif 64