From 937f8ce8e0ad13f2a8d19face3c3c65b1f081c71 Mon Sep 17 00:00:00 2001
From: scarf <greenscarf005@gmail.com>
Date: Thu, 6 Oct 2022 11:58:20 +0900
Subject: [PATCH] refactor: make fuel_count const

---
 src/vehicle_use.cpp | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/vehicle_use.cpp b/src/vehicle_use.cpp
index f755f78a16d4..d4bf234cbf85 100644
--- a/src/vehicle_use.cpp
+++ b/src/vehicle_use.cpp
@@ -373,10 +373,10 @@ void vehicle::control_engines()
     int e_toggle = 0;
     bool dirty = false;
     //count active engines
-    int fuel_count = 0;
-    for( int e : engines ) {
-        fuel_count += part_info( e ).engine_fuel_opts().size();
-    }
+    const int fuel_count = std::accumulate( engines.begin(), engines.end(), int{0},
+    [&]( int acc, int e ) {
+        return acc + part_info( e ).engine_fuel_opts().size();
+    } );
 
     const auto adjust_engine = [this]( int e_toggle ) {
         int i = 0;