From bc573d108441f94d913e725d9c55c065b7bb3ded Mon Sep 17 00:00:00 2001
From: Jonathan Lifflander <jliffla@sandia.gov>
Date: Tue, 25 Jun 2019 16:14:26 -0700
Subject: [PATCH] #410: util: make tangent method const

---
 src/vt/termination/interval/discrete_interval.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/vt/termination/interval/discrete_interval.h b/src/vt/termination/interval/discrete_interval.h
index cb18875534..ada156c8f6 100644
--- a/src/vt/termination/interval/discrete_interval.h
+++ b/src/vt/termination/interval/discrete_interval.h
@@ -111,7 +111,7 @@ struct Interval {
    *                    gap            gap
    */
 
-  PositionEnum tangent(IntervalType const& i, DomainT gap = 1) {
+  PositionEnum tangent(IntervalType const& i, DomainT gap = 1) const {
     if (lb_ == i.ub_ + gap) {
       return PositionEnum::TangentLeft;
     } else if (ub_ == i.lb_ - gap) {