From 4810f8256e7e375bd574bc755080eb314d7db373 Mon Sep 17 00:00:00 2001
From: Ian Bell <ian.h.bell@gmail.com>
Date: Mon, 30 Jun 2014 17:10:52 +0200
Subject: [PATCH] REFPROP backend can calculate molar mass

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
---
 src/Backends/REFPROP/REFPROPMixtureBackend.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/Backends/REFPROP/REFPROPMixtureBackend.h b/src/Backends/REFPROP/REFPROPMixtureBackend.h
index f82113fd..ba5b6728 100644
--- a/src/Backends/REFPROP/REFPROPMixtureBackend.h
+++ b/src/Backends/REFPROP/REFPROPMixtureBackend.h
@@ -49,6 +49,13 @@ public:
 				double value2
 				);
 
+    long double calc_molar_mass(void){
+        if (!_molar_mass){
+            calc_molar_mass();
+        }
+        return _molar_mass.pt();
+    };
+
 	/// Returns true if REFPROP is supported on this platform
 	bool REFPROP_supported(void);