Unnecessary -> Unused

clippy_lints/src/lib.rs

@@ -360,7 +360,7 @@ mod unnamed_address;
 mod unnecessary_self_imports;
 mod unnecessary_sort_by;
 mod unnecessary_wraps;
-mod unnecessary_async;
+mod unused_async;
 mod unnested_or_patterns;
 mod unsafe_removed_from_name;
 mod unused_io_amount;
@@ -955,7 +955,7 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf:
         unit_types::UNIT_CMP,
         unnamed_address::FN_ADDRESS_COMPARISONS,
         unnamed_address::VTABLE_ADDRESS_COMPARISONS,
-        unnecessary_async::UNNECESSARY_ASYNC,
+        unused_async::UNUSED_ASYNC,
         unnecessary_self_imports::UNNECESSARY_SELF_IMPORTS,
         unnecessary_sort_by::UNNECESSARY_SORT_BY,
         unnecessary_wraps::UNNECESSARY_WRAPS,
@@ -1273,7 +1273,7 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf:
     store.register_late_pass(|| box manual_map::ManualMap);
     store.register_late_pass(move || box if_then_some_else_none::IfThenSomeElseNone::new(msrv));
     store.register_early_pass(|| box bool_assert_comparison::BoolAssertComparison);
-    store.register_late_pass(|| box unnecessary_async::UnnecessaryAsync);
+    store.register_late_pass(|| box unused_async::UnusedAsync);
 
     store.register_group(true, "clippy::restriction", Some("clippy_restriction"), vec![
         LintId::of(arithmetic::FLOAT_ARITHMETIC),
@@ -1415,7 +1415,7 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf:
         LintId::of(unicode::NON_ASCII_LITERAL),
         LintId::of(unicode::UNICODE_NOT_NFC),
         LintId::of(unit_types::LET_UNIT_VALUE),
-        LintId::of(unnecessary_async::UNNECESSARY_ASYNC),
+        LintId::of(unused_async::UNUSED_ASYNC),
         LintId::of(unnecessary_wraps::UNNECESSARY_WRAPS),
         LintId::of(unnested_or_patterns::UNNESTED_OR_PATTERNS),
         LintId::of(unused_self::UNUSED_SELF),

clippy_lints/src/unused_async.rs

@@ -30,12 +30,12 @@ declare_clippy_lint! {
     /// }
     /// let number_future = async { get_random_number_improved() };
     /// ```
-    pub UNNECESSARY_ASYNC,
+    pub UNUSED_ASYNC,
     pedantic,
     "finds async functions with no await statements"
 }
 
-declare_lint_pass!(UnnecessaryAsync => [UNNECESSARY_ASYNC]);
+declare_lint_pass!(UnusedAsync => [UNUSED_ASYNC]);
 
 struct AsyncFnVisitor<'a, 'tcx> {
     cx: &'a LateContext<'tcx>,
@@ -57,7 +57,7 @@ impl<'a, 'tcx> Visitor<'tcx> for AsyncFnVisitor<'a, 'tcx> {
     }
 }
 
-impl<'tcx> LateLintPass<'tcx> for UnnecessaryAsync {
+impl<'tcx> LateLintPass<'tcx> for UnusedAsync {
     fn check_item(&mut self, _: &LateContext<'tcx>, item: &'tcx Item<'tcx>) {
         if let ItemKind::Trait(..) = item.kind {
             return;
@@ -79,9 +79,9 @@ impl<'tcx> LateLintPass<'tcx> for UnnecessaryAsync {
                 if !visitor.found_await {
                     span_lint_and_help(
                         cx,
-                        UNNECESSARY_ASYNC,
+                        UNUSED_ASYNC,
                         span,
-                        "unnecessary `async` for function with no await statements",
+                        "unused `async` for function with no await statements",
                         None,
                         "consider removing the `async` from this function",
                     );

tests/ui/unused_async.rs

@@ -1,5 +1,5 @@
 // edition:2018
-#![warn(clippy::unnecessary_async)]
+#![warn(clippy::unused_async)]
 
 async fn foo() -> i32 {
     4

tests/ui/unused_async.stderr

@@ -1,12 +1,12 @@
-error: unnecessary `async` for function with no await statements
-  --> $DIR/unnecessary_async.rs:4:1
+error: unused `async` for function with no await statements
+  --> $DIR/unused_async.rs:4:1
    |
 LL | / async fn foo() -> i32 {
 LL | |     4
 LL | | }
    | |_^
    |
-   = note: `-D clippy::unnecessary-async` implied by `-D warnings`
+   = note: `-D clippy::unused-async` implied by `-D warnings`
    = help: consider removing the `async` from this function
 
 error: aborting due to previous error