| 1 | //===--- Availability.h - Classes for availability --------------*- C++ -*-===// |
|---|---|
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | // |
| 9 | // This files defines some classes that implement availability checking. |
| 10 | // |
| 11 | //===----------------------------------------------------------------------===// |
| 12 | |
| 13 | #ifndef LLVM_CLANG_AST_AVAILABILITY_H |
| 14 | #define LLVM_CLANG_AST_AVAILABILITY_H |
| 15 | |
| 16 | #include "clang/Basic/SourceLocation.h" |
| 17 | #include "llvm/ADT/StringRef.h" |
| 18 | #include "llvm/Support/VersionTuple.h" |
| 19 | |
| 20 | namespace clang { |
| 21 | |
| 22 | /// One specifier in an @available expression. |
| 23 | /// |
| 24 | /// \code |
| 25 | /// @available(macos 10.10, *) |
| 26 | /// \endcode |
| 27 | /// |
| 28 | /// Here, 'macos 10.10' and '*' both map to an instance of this type. |
| 29 | /// |
| 30 | class AvailabilitySpec { |
| 31 | /// Represents the version that this specifier requires. If the host OS |
| 32 | /// version is greater than or equal to Version, the @available will evaluate |
| 33 | /// to true. |
| 34 | VersionTuple Version; |
| 35 | |
| 36 | /// Name of the platform that Version corresponds to. |
| 37 | StringRef Platform; |
| 38 | |
| 39 | SourceLocation BeginLoc, EndLoc; |
| 40 | |
| 41 | public: |
| 42 | AvailabilitySpec(VersionTuple Version, StringRef Platform, |
| 43 | SourceLocation BeginLoc, SourceLocation EndLoc) |
| 44 | : Version(Version), Platform(Platform), BeginLoc(BeginLoc), |
| 45 | EndLoc(EndLoc) {} |
| 46 | |
| 47 | /// This constructor is used when representing the '*' case. |
| 48 | AvailabilitySpec(SourceLocation StarLoc) |
| 49 | : BeginLoc(StarLoc), EndLoc(StarLoc) {} |
| 50 | |
| 51 | VersionTuple getVersion() const { return Version; } |
| 52 | StringRef getPlatform() const { return Platform; } |
| 53 | SourceLocation getBeginLoc() const { return BeginLoc; } |
| 54 | SourceLocation getEndLoc() const { return EndLoc; } |
| 55 | |
| 56 | /// Returns true when this represents the '*' case. |
| 57 | bool isOtherPlatformSpec() const { return Version.empty(); } |
| 58 | }; |
| 59 | |
| 60 | } // end namespace clang |
| 61 | |
| 62 | #endif |
| 63 |