rename is_async_fn to asyncness

src/librustc/query/mod.rs

@@ -244,7 +244,7 @@ rustc_queries! {
             desc { |tcx| "checking if item is const fn: `{}`", tcx.def_path_str(key) }
         }
 
-        query is_async_fn(key: DefId) -> bool {
+        query asyncness(key: DefId) -> hir::IsAsync {
             desc { |tcx| "checking if the function is async: `{}`", tcx.def_path_str(key) }
         }
 

src/librustc/ty/mod.rs

@@ -3349,16 +3349,17 @@ fn issue33140_self_ty(tcx: TyCtxt<'_>, def_id: DefId) -> Option<Ty<'_>> {
     }
 }
 
-fn is_async_fn(tcx: TyCtxt<'_>, def_id: DefId) -> bool {
+/// Check if a function is async.
+fn asyncness(tcx: TyCtxt<'_>, def_id: DefId) -> hir::IsAsync {
     if let Some(hir_id) = tcx.hir().as_local_hir_id(def_id) {
         let node = tcx.hir().get(hir_id);
         if let Some(fn_like) = hir::map::blocks::FnLikeNode::from_node(node) {
-             fn_like.asyncness() == hir::IsAsync::Async
+             fn_like.asyncness()
         } else {
-            false
+            hir::IsAsync::NotAsync
         }
     } else {
-        false
+        hir::IsAsync::NotAsync
     }
 }
 
@@ -3370,7 +3371,7 @@ pub fn provide(providers: &mut ty::query::Providers<'_>) {
     util::provide(providers);
     constness::provide(providers);
     *providers = ty::query::Providers {
-        is_async_fn,
+        asyncness,
         associated_item,
         associated_item_def_ids,
         adt_sized_constraint,