From 991508539f0c410bb818ba342dfe2aebcf8ed0af Mon Sep 17 00:00:00 2001
From: Jaseem Abid <me@jabid.in>
Date: Sat, 5 Mar 2022 00:46:03 +0000
Subject: [PATCH] Derive default instead of obvious manual impl

Signed-off-by: Jaseem Abid <me@jabid.in>
---
 src/registry.rs | 21 +++------------------
 1 file changed, 3 insertions(+), 18 deletions(-)

diff --git a/src/registry.rs b/src/registry.rs
index d204d8e0..a4be61f1 100644
--- a/src/registry.rs
+++ b/src/registry.rs
@@ -15,6 +15,7 @@ use crate::proto;
 use cfg_if::cfg_if;
 use lazy_static::lazy_static;
 
+#[derive(Default)]
 struct RegistryCore {
     pub collectors_by_id: HashMap<u64, Box<dyn Collector>>,
     pub dim_hashes_by_name: HashMap<String, u64>,
@@ -216,31 +217,15 @@ impl RegistryCore {
 
 /// A struct for registering Prometheus collectors, collecting their metrics, and gathering
 /// them into `MetricFamilies` for exposition.
-#[derive(Clone, Debug)]
+#[derive(Clone, Default, Debug)]
 pub struct Registry {
     r: Arc<RwLock<RegistryCore>>,
 }
 
-impl Default for Registry {
-    fn default() -> Registry {
-        let r = RegistryCore {
-            collectors_by_id: HashMap::new(),
-            dim_hashes_by_name: HashMap::new(),
-            desc_ids: HashSet::new(),
-            labels: None,
-            prefix: None,
-        };
-
-        Registry {
-            r: Arc::new(RwLock::new(r)),
-        }
-    }
-}
-
 impl Registry {
     /// `new` creates a Registry.
     pub fn new() -> Registry {
-        Registry::default()
+        Default::default()
     }
 
     /// Create a new registry, with optional custom prefix and labels.