From 8c266391f33f6a86d1c0aaa410e7a05fc1df35b0 Mon Sep 17 00:00:00 2001
From: Dirkjan Ochtman <dirkjan@ochtman.nl>
Date: Thu, 1 Feb 2024 10:44:15 +0100
Subject: [PATCH] bb8: replace manual implementation of saturating_sub()

---
 bb8/src/internals.rs | 15 ++-------------
 1 file changed, 2 insertions(+), 13 deletions(-)

diff --git a/bb8/src/internals.rs b/bb8/src/internals.rs
index 8aa79d6..ed153f0 100644
--- a/bb8/src/internals.rs
+++ b/bb8/src/internals.rs
@@ -125,24 +125,13 @@ where
     pub(crate) fn wanted(&mut self, config: &Builder<M>) -> ApprovalIter {
         let available = self.conns.len() as u32 + self.pending_conns;
         let min_idle = config.min_idle.unwrap_or(0);
-        let wanted = if available < min_idle {
-            min_idle - available
-        } else {
-            0
-        };
-
+        let wanted = min_idle.saturating_sub(available);
         self.approvals(config, wanted)
     }
 
     fn approvals(&mut self, config: &Builder<M>, num: u32) -> ApprovalIter {
         let current = self.num_conns + self.pending_conns;
-        let allowed = if current < config.max_size {
-            config.max_size - current
-        } else {
-            0
-        };
-
-        let num = min(num, allowed);
+        let num = min(num, config.max_size.saturating_sub(current));
         self.pending_conns += num;
         ApprovalIter { num: num as usize }
     }