From 50e9cfba56997fc966a052013adf52e2d64e4f16 Mon Sep 17 00:00:00 2001
From: Elias Pipping <elias.pipping@fu-berlin.de>
Date: Sat, 10 Sep 2011 21:51:30 +0200
Subject: [PATCH] More constness

---
 src/mynonlinearity.cc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/mynonlinearity.cc b/src/mynonlinearity.cc
index b07eaa03..faee61e3 100644
--- a/src/mynonlinearity.cc
+++ b/src/mynonlinearity.cc
@@ -23,7 +23,8 @@ class MyNonlinearity {
   typedef SmallMatrix MatrixType;
 
   // directional subdifferential: at u on the line u + t*v
-  void directionalSubDiff(VectorType u, VectorType v, Interval<double>& D) {
+  void directionalSubDiff(VectorType const u, VectorType const v,
+                          Interval<double>& D) const {
     if (u == SmallVector(0.0)) {
       D[0] = D[1] = func_.rightDifferential(0);
       return;
-- 
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