From ca9f2b387df76fe873dd4ef0b5233b5d47211ef0 Mon Sep 17 00:00:00 2001
From: Douglas Greenshields <douglas.greenshields@levellingup.gov.uk>
Date: Fri, 26 Apr 2024 14:31:16 +0100
Subject: [PATCH] complete instance of memoisation in boiler module

---
 src/core/heating_systems/boiler.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/core/heating_systems/boiler.rs b/src/core/heating_systems/boiler.rs
index 3e4510f..afd17d5 100644
--- a/src/core/heating_systems/boiler.rs
+++ b/src/core/heating_systems/boiler.rs
@@ -136,7 +136,7 @@ impl BoilerServiceWaterCombi {
         )
     }
 
-    fn boiler_combi_loss(&self, energy_demand: f64, timestep: f64) -> f64 {
+    fn boiler_combi_loss(&mut self, energy_demand: f64, timestep: f64) -> f64 {
         // daily hot water usage factor
         let threshold_volume = 100.;
         let fu = if self.daily_hot_water_usage < threshold_volume {
@@ -186,7 +186,7 @@ impl BoilerServiceWaterCombi {
             }
         };
 
-        // TODO account for the weird memoisation of the combi_loss in the Python
+        self.combi_loss = combi_loss;
 
         combi_loss
     }