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f9a93a55d7
Centralize the `SWIFT_{BEGIN/END}_NULLABILITY_ANNOTATIONS` definitions in a new
Nullability.h header to share.
42 lines
1.6 KiB
C
42 lines
1.6 KiB
C
//===--- Nullability.h ----------------------------------------------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2023 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_BASIC_NULLABILITY_H
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#define SWIFT_BASIC_NULLABILITY_H
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// TODO: These macro definitions are duplicated in Visibility.h. Move
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// them to a single file if we find a location that both Visibility.h and
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// BridgedSwiftObject.h can import.
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#if __has_feature(nullability)
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// Provide macros to temporarily suppress warning about the use of
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// _Nullable and _Nonnull.
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#define SWIFT_BEGIN_NULLABILITY_ANNOTATIONS \
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_Pragma("clang diagnostic push") \
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_Pragma("clang diagnostic ignored \"-Wnullability-extension\"")
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#define SWIFT_END_NULLABILITY_ANNOTATIONS _Pragma("clang diagnostic pop")
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#define SWIFT_BEGIN_ASSUME_NONNULL _Pragma("clang assume_nonnull begin")
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#define SWIFT_END_ASSUME_NONNULL _Pragma("clang assume_nonnull end")
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#else
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// #define _Nullable and _Nonnull to nothing if we're not being built
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// with a compiler that supports them.
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#define _Nullable
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#define _Nonnull
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#define _Null_unspecified
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#define SWIFT_BEGIN_NULLABILITY_ANNOTATIONS
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#define SWIFT_END_NULLABILITY_ANNOTATIONS
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#define SWIFT_BEGIN_ASSUME_NONNULL
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#define SWIFT_END_ASSUME_NONNULL
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#endif
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#endif
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