omochimetaru

@swift-5.6.3 @differentiable func f(_ x: Float) -> Float { x * x } let dfdx = derivative(of: f) print(dfdx(3))

exit status: 1 with stderr:

<stdin>:1:16: warning: '@differentiable' has been renamed to '@differentiable(reverse)' and will be removed in the next release @differentiable ^ (reverse) <stdin>:1:2: error: @differentiable attribute used without importing module '_Differentiation' @differentiable ~^~~~~~~~~~~~~~ <stdin>:5:12: error: cannot find 'derivative' in scope let dfdx = derivative(of: f) ^~~~~~~~~~