From 5283dc9d19326b0ab0a162e84d7142b7ff58ee90 Mon Sep 17 00:00:00 2001
From: Scott Stephens <stephens.js@gmail.com>
Date: Fri, 23 Sep 2016 16:21:47 -0500
Subject: [PATCH] Optimization: Changes to LazyObjectiveFunctionBase

* Previous versions of the class did not allow subclasses to
initialize the value/gradient/hessian fields once and reuse the
memory for subsequent evaluations.
* This commit exposes raw value/gradient/hessian fields to
subclasses
---
 .../ObjectiveFunctions/LazyObjectiveFunctionBase.cs  | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/src/Numerics/Optimization/ObjectiveFunctions/LazyObjectiveFunctionBase.cs b/src/Numerics/Optimization/ObjectiveFunctions/LazyObjectiveFunctionBase.cs
index d8357772..5ec0aa0c 100644
--- a/src/Numerics/Optimization/ObjectiveFunctions/LazyObjectiveFunctionBase.cs
+++ b/src/Numerics/Optimization/ObjectiveFunctions/LazyObjectiveFunctionBase.cs
@@ -6,14 +6,14 @@ namespace MathNet.Numerics.Optimization.ObjectiveFunctions
     {
         Vector<double> _point;
 
-        bool _hasFunctionValue;
-        double _functionValue;
+        protected bool _hasFunctionValue;
+        protected double _functionValue;
 
-        bool _hasGradientValue;
-        Vector<double> _gradientValue;
+        protected bool _hasGradientValue;
+        protected Vector<double> _gradientValue;
 
-        bool _hasHessianValue;
-        Matrix<double> _hessianValue;
+        protected bool _hasHessianValue;
+        protected Matrix<double> _hessianValue;
 
         protected LazyObjectiveFunctionBase(bool gradientSupported, bool hessianSupported)
         {