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Consider: 1. File struct.swift defining `struct Struct` with `static func max` member 2. File derivatives.swift defining `extension Struct` with custom derivative of the `max` function 3. File error.swift defining a differentiable function which uses `Struct.max`. Previously, when passing error.swift as primary file and derivatives.swift as a secondary file to swift-frontend (and forgetting to pass struct.swift as a secondary file as well), an assertion failure was triggered. This patch fixes the issue by adding a check against `ErrorType` in `findAutoDiffOriginalFunctionDecl` before calling `lookupMember`. Co-authored-by: Anton Korobeynikov <anton@korobeynikov.info>
15 lines
216 B
Swift
15 lines
216 B
Swift
import _Differentiation
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struct Struct {
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@inlinable
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static func max<T: Comparable>(
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_ x: T,
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_ y: T
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) -> T {
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if x > y
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return y
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else
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return x
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}
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}
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