Test exhaustiveness of type match in collect_lifetimes

dtolnay · dtolnay · commit 6e800ff826f0 · 2021-01-24T23:04:01.000-08:00
diff --git a/serde_derive/src/internals/attr.rs b/serde_derive/src/internals/attr.rs
@@ -1909,8 +1909,12 @@ fn collect_lifetimes(ty: &syn::Type, out: &mut BTreeSet<syn::Lifetime>) {
         | syn::Type::TraitObject(_)
         | syn::Type::ImplTrait(_)
         | syn::Type::Infer(_)
-        | syn::Type::Verbatim(_)
-        | _ => {}
+        | syn::Type::Verbatim(_) => {}
+
+        #[cfg(test)]
+        syn::Type::__TestExhaustive(_) => unimplemented!(),
+        #[cfg(not(test))]
+        _ => {}
     }
 }
 

Original file line number	Diff line number	Diff line change
`@@ -1909,8 +1909,12 @@ fn collect_lifetimes(ty: &syn::Type, out: &mut BTreeSet<syn::Lifetime>) {`
`1909`	`1909`	`\| syn::Type::TraitObject(_)`
`1910`	`1910`	`\| syn::Type::ImplTrait(_)`
`1911`	`1911`	`\| syn::Type::Infer(_)`
`1912`		`- \| syn::Type::Verbatim(_)`
`1913`		`- \| _ => {}`
	`1912`	`+ \| syn::Type::Verbatim(_) => {}`
	`1913`	`+`
	`1914`	`+ #[cfg(test)]`
	`1915`	`+ syn::Type::__TestExhaustive(_) => unimplemented!(),`
	`1916`	`+ #[cfg(not(test))]`
	`1917`	`+ _ => {}`
`1914`	`1918`	`}`
`1915`	`1919`	`}`
`1916`	`1920`