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Max Desiatov
33bc1be125
**Explanation**: Provides an error diagnostic that notifies the user that recursive generics are not supported in Embedded Swift. This prevents current OOM behavior in `swift-frontend`. **Scope**: limited to a rarely used pattern in Embedded Swift **Risk**: low due to limited scope. **Testing**: added new lit test **Issue**: rdar://174011486
11 lines
610 B
Swift
11 lines
610 B
Swift
// RUN: %target-swift-frontend -typecheck %s -enable-experimental-feature Embedded -verify
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// REQUIRES: swift_in_compiler
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// REQUIRES: swift_feature_Embedded
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// Self-referential generic superclass should be diagnosed in Embedded Swift
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// because it creates a circular metadata dependency.
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final class Tree: ManagedBuffer<Int, Tree> { // expected-error {{class 'Tree' cannot inherit from 'ManagedBuffer<Int, Tree>' in Embedded Swift because a generic argument of the superclass refers to the subclass itself, creating a circular metadata dependency}}
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var children: AnySequence<Tree> { AnySequence([]) }
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}
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