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//===--- Availability.h - Classes for availability --------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This files defines some classes that implement availability checking.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_AST_AVAILABILITY_H
#define LLVM_CLANG_AST_AVAILABILITY_H
#include "clang/Basic/SourceLocation.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/VersionTuple.h"
namespace clang {
/// One specifier in an @available expression.
///
/// \code
/// @available(macos 10.10, *)
/// \endcode
///
/// Here, 'macos 10.10' and '*' both map to an instance of this type.
///
class AvailabilitySpec {
/// Represents the version that this specifier requires. If the host OS
/// version is greater than or equal to Version, the @available will evaluate
/// to true.
VersionTuple Version;
/// Name of the platform that Version corresponds to.
StringRef Platform;
SourceLocation BeginLoc, EndLoc;
public:
AvailabilitySpec(VersionTuple Version, StringRef Platform,
SourceLocation BeginLoc, SourceLocation EndLoc)
: Version(Version), Platform(Platform), BeginLoc(BeginLoc),
EndLoc(EndLoc) {}
/// This constructor is used when representing the '*' case.
AvailabilitySpec(SourceLocation StarLoc)
: BeginLoc(StarLoc), EndLoc(StarLoc) {}
VersionTuple getVersion() const { return Version; }
StringRef getPlatform() const { return Platform; }
SourceLocation getBeginLoc() const { return BeginLoc; }
SourceLocation getEndLoc() const { return EndLoc; }
/// Returns true when this represents the '*' case.
bool isOtherPlatformSpec() const { return Version.empty(); }
};
} // end namespace clang
#endif
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