[mlpack-git] master: Add SFINAE pattern for the Gradient and Deterministic function. (d15ff95)

[gitdub at big.cc.gt.atl.ga.us]

Repository : https://github.com/mlpack/mlpack

On branch  : master
Link       : https://github.com/mlpack/mlpack/compare/ea45ace1ff744390a4c35183528eda881eda5c61...fd336238de224ed72fc23b84e1e2f02ae3c879d6

>---------------------------------------------------------------

commit d15ff9548b4914961425cf774a5488b9aaae8779
Author: Marcus Edel <marcus.edel at fu-berlin.de>
Date:   Tue Aug 25 14:15:02 2015 +0200

    Add SFINAE pattern for the Gradient and Deterministic function.


>---------------------------------------------------------------

d15ff9548b4914961425cf774a5488b9aaae8779
 src/mlpack/methods/ann/layer/layer_traits.hpp | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/src/mlpack/methods/ann/layer/layer_traits.hpp b/src/mlpack/methods/ann/layer/layer_traits.hpp
index 0231171..a8be63a 100644
--- a/src/mlpack/methods/ann/layer/layer_traits.hpp
+++ b/src/mlpack/methods/ann/layer/layer_traits.hpp
@@ -8,6 +8,8 @@
 #ifndef __MLPACK_METHODS_ANN_LAYER_LAYER_TRAITS_HPP
 #define __MLPACK_METHODS_ANN_LAYER_LAYER_TRAITS_HPP
 
+#include <mlpack/core/util/sfinae_utility.hpp>
+
 namespace mlpack {
 namespace ann {
 
@@ -41,8 +43,22 @@ class LayerTraits
    * This is true if the layer is a LSTM layer.
    **/
   static const bool IsLSTMLayer = false;
+
+  /*
+   * This is true if the layer is a connection layer.
+   **/
+  static const bool IsConnection = false;
 };
 
+// This gives us a HasGradientCheck<T, U> type (where U is a function pointer)
+// we can use with SFINAE to catch when a type has a Gradient(...) function.
+HAS_MEM_FUNC(Gradient, HasGradientCheck);
+
+// This gives us a HasDeterministicCheck<T, U> type (where U is a function
+// pointer) we can use with SFINAE to catch when a type has a Deterministic()
+// function.
+HAS_MEM_FUNC(Deterministic, HasDeterministicCheck);
+
 }; // namespace ann
 }; // namespace mlpack