From 1fbbbfbc4016b56242f6db0fd03755ae1cacc88d Mon Sep 17 00:00:00 2001
From: Ian Bell <ian.bell@nist.gov>
Date: Thu, 3 Nov 2022 15:37:23 -0400
Subject: [PATCH] More const for vdW

---
 include/teqp/models/vdW.hpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/teqp/models/vdW.hpp b/include/teqp/models/vdW.hpp
index cd9ea4b..214444b 100644
--- a/include/teqp/models/vdW.hpp
+++ b/include/teqp/models/vdW.hpp
@@ -19,8 +19,8 @@ public:
     vdWEOS1(double a, double b) : a(a), b(b) {};
     
     /// Accessor functions
-    double get_a(){ return a; }
-    double get_b(){ return b; }
+    double get_a() const{ return a; }
+    double get_b() const{ return b; }
 
     const double Ru = 1.380649e-23 * 6.02214076e23; ///< Exact value, given by k_B*N_A
 
-- 
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