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Previously, two conditions were necessary to enable differentiable programming: - Using the `-enable-experimental-differentiable-programming` frontend flag. - Importing the `_Differentiation` module. Importing the `_Differentiation` module is the true condition because it contains the required compiler-known `Differentiable` protocol. The frontend flag is redundant and cumbersome. Now, the frontend flag is removed. Importing `_Differentiation` is the only condition.
24 lines
999 B
Swift
24 lines
999 B
Swift
// RUN: %target-swift-frontend -typecheck -verify %s
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// expected-error @+1 {{'@differentiable' attribute used without importing module '_Differentiation'}}
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let _: @differentiable (Float) -> Float
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// expected-error @+2 {{'@differentiable' attribute used without importing module '_Differentiation'}}
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// expected-error @+1 {{'@noDerivative' attribute used without importing module '_Differentiation'}}
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let _: @differentiable (Float, @noDerivative Float) -> Float
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// expected-error @+1 {{'@noDerivative' attribute used without importing module '_Differentiation'}}
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let _: (Float, @noDerivative Float) -> Float
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// expected-error @+1 {{'@noDerivative' attribute used without importing module '_Differentiation'}}
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let _: @noDerivative Float
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func id(_ x: Float) -> Float {
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return x
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}
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// expected-error @+1 {{@derivative attribute used without importing module '_Differentiation'}}
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@derivative(of: id)
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func jvpId(x: Float) -> (value: Float, differential: (Float) -> (Float)) {
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return (x, { $0 })
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}
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