Fix includes.

src/mlpack/methods/ann/layer/alpha_dropout.hpp

@@ -17,6 +17,7 @@
 #define MLPACK_METHODS_ANN_LAYER_ALPHA_DROPOUT_HPP
 
 #include <mlpack/prereqs.hpp>
+#include "layer.hpp"
 
 namespace mlpack {
 namespace ann /** Artificial Neural Network. */ {

src/mlpack/methods/ann/layer/base_layer.hpp

@@ -30,6 +30,7 @@
 #include <mlpack/methods/ann/activation_functions/hard_swish_function.hpp>
 #include <mlpack/methods/ann/activation_functions/tanh_exponential_function.hpp>
 #include <mlpack/methods/ann/activation_functions/silu_function.hpp>
+#include "layer.hpp"
 
 namespace mlpack {
 namespace ann /** Artificial Neural Network. */ {

src/mlpack/methods/ann/layer/concatenate.hpp

@@ -14,6 +14,7 @@
 #define MLPACK_METHODS_ANN_LAYER_CONCATENATE_HPP
 
 #include <mlpack/prereqs.hpp>
+#include "layer.hpp"
 
 namespace mlpack {
 namespace ann /** Artificial Neural Network. */ {

src/mlpack/methods/ann/layer/convolution.hpp

@@ -20,7 +20,7 @@
 #include <mlpack/methods/ann/convolution_rules/svd_convolution.hpp>
 #include <mlpack/core/util/to_lower.hpp>
 
-#include "layer_types.hpp"
+#include "layer.hpp"
 #include "padding.hpp"
 
 namespace mlpack {

src/mlpack/methods/ann/layer/max_pooling.hpp

@@ -15,6 +15,8 @@
 
 #include <mlpack/prereqs.hpp>
 
+#include "layer.hpp"
+
 namespace mlpack {
 namespace ann /** Artificial Neural Network. */ {
 

src/mlpack/methods/ann/layer/multi_layer.hpp

@@ -13,6 +13,7 @@
 #define MLPACK_METHODS_ANN_LAYER_MULTI_LAYER_HPP
 
 #include "../make_alias.hpp"
+#include "layer.hpp"
 
 namespace mlpack {
 namespace ann {

src/mlpack/methods/ann/layer/radial_basis_function.hpp

@@ -16,7 +16,7 @@
 #include <mlpack/prereqs.hpp>
 #include <mlpack/methods/ann/activation_functions/gaussian_function.hpp>
 
-#include "layer_types.hpp"
+#include "layer.hpp"
 
 namespace mlpack {
 namespace ann /** Artificial Neural Network. */ {

src/mlpack/methods/ann/layer/recurrent_layer.hpp

@@ -12,6 +12,9 @@
 #ifndef MLPACK_METHODS_ANN_LAYER_RECURRENT_LAYER_HPP
 #define MLPACK_METHODS_ANN_LAYER_RECURRENT_LAYER_HPP
 
+#include <mlpack/prereqs.hpp>
+#include "layer.hpp"
+
 namespace mlpack {
 namespace ann {