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
20namespace 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///
30class 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
41public:
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

source code of clang/include/clang/AST/Availability.h