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The standard library defines
```
protocol BitwiseCopyable {}
typealias _BitwiseCopyable = BitwiseCopyable
```
For current compilers, `BitwiseCopyable` is a "known protocol".
For older compilers, it is not; instead `_BitwiseCopyable` is. So
print the following into the swiftinterface for those older compilers:
```
protocol _BitwiseCopyable {}
typealias BitwiseCopyable = _BitwiseCopyable
```
rdar://127755503
22 lines
843 B
Swift
22 lines
843 B
Swift
// RUN: %empty-directory(%t)
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// RUN: %target-swift-emit-module-interface(%t.swiftinterface) %s -parse-stdlib -module-name Swift
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// RUN: %FileCheck %s < %t.swiftinterface
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// RUN: %target-swift-typecheck-module-from-interface(%t.swiftinterface) -parse-stdlib -module-name Swift
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// CHECK: #if compiler(>=5.3) && $BitwiseCopyable2
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// CHECK-NEXT: public protocol BitwiseCopyable {
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// CHECK-NEXT: }
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// CHECK-NEXT: #else
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// CHECK-NEXT: public protocol _BitwiseCopyable {
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// CHECK-NEXT: }
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// CHECK-NEXT: #endif
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// CHECK: #if compiler(>=5.3) && $BitwiseCopyable2
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// CHECK-NEXT: public typealias _BitwiseCopyable = Swift.BitwiseCopyable
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// CHECK-NEXT: #else
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// CHECK-NEXT: public typealias BitwiseCopyable = Swift._BitwiseCopyable
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// CHECK-NEXT: #endif
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public protocol BitwiseCopyable {}
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public typealias _BitwiseCopyable = BitwiseCopyable
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