README changes

Author: ProfFan

Documentation/X10/SUMMARY.md

@@ -22,8 +22,7 @@ public struct MyModel: Layer {
   public var dense3 = Dense<Float>(inputSize: 4, outputSize: 4)
   public var flatten = Flatten<Float>()
 
-  @differentiable
-  public func callAsFunction(_ input: Tensor<Float>) -> Tensor<Float> {
+  @differentiable(reverse)  public func callAsFunction(_ input: Tensor<Float>) -> Tensor<Float> {
     let layer1 = dense1(input)
     let layer2 = layer1.reshaped(to: [1, 4])
     let layer3 = dense2(layer2)

README.md

@@ -34,8 +34,7 @@ struct Model: Layer {
     var layer2 = Dense<Float>(inputSize: hiddenSize, outputSize: hiddenSize, activation: relu)
     var layer3 = Dense<Float>(inputSize: hiddenSize, outputSize: 3, activation: identity)
 
-    @differentiable
-    func callAsFunction(_ input: Tensor<Float>) -> Tensor<Float> {
+    @differentiable(reverse)    func callAsFunction(_ input: Tensor<Float>) -> Tensor<Float> {
         return input.sequenced(through: layer1, layer2, layer3)
     }
 }