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 21 namespace 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 /// 31 class 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 42 public: 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