learn that 2018 is the future, and yet another unnoticed clippy hint

ssomers · ssomers · commit fe2fe18a8a6a · 2019-10-25T13:31:37.000+02:00
diff --git a/Cargo.toml b/Cargo.toml
@@ -2,6 +2,7 @@
 name = "rust_bench_sets_compared"
 version = "0.1.0"
 authors = ["Stein Somers <git@steinsomers.be>"]
+edition = "2018"
 
 [dev-dependencies]
 proptest = "0.9"
diff --git a/src/main.rs b/src/main.rs
@@ -41,7 +41,7 @@ fn hash_retain(s: &mut HashSet<i32>) -> Option<i32> {
     let mut snatched: Option<i32> = None;
     s.retain(|elt| match snatched {
         None => {
-            snatched = Some(elt.clone());
+            snatched = Some(*elt);
             false
         }
         Some(_) => true,

Original file line number	Diff line number	Diff line change
`@@ -41,7 +41,7 @@ fn hash_retain(s: &mut HashSet<i32>) -> Option<i32> {`
`41`	`41`	`let mut snatched: Option<i32> = None;`
`42`	`42`	`s.retain(\|elt\| match snatched {`
`43`	`43`	`None => {`
`44`		`- snatched = Some(elt.clone());`
	`44`	`+ snatched = Some(*elt);`
`45`	`45`	`false`
`46`	`46`	`}`
`47`	`47`	`Some(_) => true,`