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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.
10 lines
463 B
Swift
10 lines
463 B
Swift
// RUN: %target-swift-frontend -typecheck -verify %s
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// Tests that Sema fails gracefully when the `_Differentiation` module is not imported.
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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 @+1 2 {{'@differentiable' attribute used without importing module '_Differentiation'}}
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func hasDifferentiableFunctionArg<T>(_ f: @differentiable (T) -> T) {}
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