NS_ASSUME_NONNULL_BEGIN doesn't apply to block return types
| Originator: | heath.borders | ||
| Number: | rdar://30696962 | Date Originated: | |
| Status: | Open | Resolved: | 24-Feb-2017 10:52 AM |
| Product: | Developer Tools | Product Version: | Xcode 8.2.1 |
| Classification: | Serious Bug | Reproducible: | Always |
Summary:
In a header file with NS_ASSUME_NONNULL_BEGIN, clang still wants an explicit nullability specifier in a block's return type.
Steps to Reproduce:
Compile the following header file:
```
#import <Foundation/Foundation.h>
NS_ASSUME_NONNULL_BEGIN
typedef NSString * (^TWNullabilityAssumeNonnullImplicitNonnullReturnTypedefHeaderBlock)(void);
NS_ASSUME_NONNULL_END
```
Expected Results:
No compiler warnings or errors.
Actual Results:
I receive the following error:
```
In file included from /Users/bordersh/workspace/TWNullability/TWNullability/TWNullability/TWNullabilityAssumeNonnullBlocks.m:9:
/Users/bordersh/workspace/TWNullability/TWNullability/TWNullability/TWNullabilityAssumeNonnullBlocks.h:18:18: error: pointer is missing a nullability type specifier (_Nonnull, _Nullable, or _Null_unspecified) [-Werror,-Wnullability-completeness]
typedef NSString * (^TWNullabilityAssumeNonnullImplicitNonnullReturnTypedefHeaderBlock)(void);
^
1 error generated.
```
Version:
Xcode 8.2.1, OS X 10.2.3
Notes:
Configuration:
Attachments:
Comments
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