append asyncness info to functions

6 files changed, 31 insertions, 7 deletions

diff --git a/src/librustc/query/mod.rs b/src/librustc/query/mod.rs
index c4f62df12b7..5e1db92b555 100644
--- a/src/librustc/query/mod.rs
+++ b/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) -> hir::IsAsync {
+        query is_async_fn(key: DefId) -> bool {
             desc { |tcx| "checking if the function is async: `{}`", tcx.def_path_str(key) }
         }
 
diff --git a/src/librustc/ty/mod.rs b/src/librustc/ty/mod.rs
index 5ca819e12f2..97981f47820 100644
--- a/src/librustc/ty/mod.rs
+++ b/src/librustc/ty/mod.rs
@@ -3349,6 +3349,20 @@ fn issue33140_self_ty(tcx: TyCtxt<'_>, def_id: DefId) -> Option<Ty<'_>> {
     }
 }
 
+fn is_async_fn(tcx: TyCtxt<'_>, def_id: DefId) -> bool {
+    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
+        } else {
+            false
+        }
+    } else {
+        false
+    }
+}
+
+
 pub fn provide(providers: &mut ty::query::Providers<'_>) {
     context::provide(providers);
     erase_regions::provide(providers);
@@ -3356,6 +3370,7 @@ pub fn provide(providers: &mut ty::query::Providers<'_>) {
     util::provide(providers);
     constness::provide(providers);
     *providers = ty::query::Providers {
+        is_async_fn,
         associated_item,
         associated_item_def_ids,
         adt_sized_constraint,
diff --git a/src/librustc_metadata/cstore_impl.rs b/src/librustc_metadata/cstore_impl.rs
index 6db3bfd8880..c46e2a901f8 100644
--- a/src/librustc_metadata/cstore_impl.rs
+++ b/src/librustc_metadata/cstore_impl.rs
@@ -133,7 +133,7 @@ provide! { <'tcx> tcx, def_id, other, cdata,
     fn_sig => { cdata.fn_sig(def_id.index, tcx) }
     inherent_impls => { cdata.get_inherent_implementations_for_type(tcx, def_id.index) }
     is_const_fn_raw => { cdata.is_const_fn_raw(def_id.index) }
-    is_async_fn { cdata.fn_asyncness(def_id.index) }
+    is_async_fn => { cdata.is_async_fn(def_id.index) }
     is_foreign_item => { cdata.is_foreign_item(def_id.index) }
     static_mutability => { cdata.static_mutability(def_id.index) }
     def_kind => { cdata.def_kind(def_id.index) }
diff --git a/src/librustc_metadata/encoder.rs b/src/librustc_metadata/encoder.rs
index 439763810ec..1e7c0829a26 100644
--- a/src/librustc_metadata/encoder.rs
+++ b/src/librustc_metadata/encoder.rs
@@ -875,7 +875,7 @@ impl EncodeContext<'tcx> {
                 EntryKind::AssocConst(container, const_qualif, rendered_const)
             }
             ty::AssocKind::Method => {
-                let fn_data = if let hir::TraitItemKind::Method(_, ref m) = ast_item.node {
+                let fn_data = if let hir::TraitItemKind::Method(method_sig, m) = &ast_item.node {
                     let param_names = match *m {
                         hir::TraitMethod::Required(ref names) => {
                             self.encode_fn_param_names(names)
@@ -885,7 +885,7 @@ impl EncodeContext<'tcx> {
                         }
                     };
                     FnData {
-                        asyncness: hir::IsAsync::NotAsync,
+                        asyncness: method_sig.header.asyncness,
                         constness: hir::Constness::NotConst,
                         param_names,
                         sig: self.lazy(&tcx.fn_sig(def_id)),
diff --git a/src/librustdoc/clean/inline.rs b/src/librustdoc/clean/inline.rs
index cb42ff1c805..0752934c8c1 100644
--- a/src/librustdoc/clean/inline.rs
+++ b/src/librustdoc/clean/inline.rs
@@ -217,7 +217,11 @@ fn build_external_function(cx: &DocContext<'_>, did: DefId) -> clean::Function {
     } else {
         hir::Constness::NotConst
     };
-
+    let asyncness =  if cx.tcx.is_async_fn(did) {
+        hir::IsAsync::Async
+    } else {
+        hir::IsAsync::NotAsync
+    };
     let predicates = cx.tcx.predicates_of(did);
     let (generics, decl) = clean::enter_impl_trait(cx, || {
         ((cx.tcx.generics_of(did), &predicates).clean(cx), (did, sig).clean(cx))
@@ -230,7 +234,7 @@ fn build_external_function(cx: &DocContext<'_>, did: DefId) -> clean::Function {
             unsafety: sig.unsafety(),
             abi: sig.abi(),
             constness,
-            asyncness: hir::IsAsync::NotAsync,
+            asyncness,
         },
         all_types,
         ret_types,
diff --git a/src/librustdoc/clean/mod.rs b/src/librustdoc/clean/mod.rs
index ae70fdc530b..7bd54c64cf6 100644
--- a/src/librustdoc/clean/mod.rs
+++ b/src/librustdoc/clean/mod.rs
@@ -2403,6 +2403,11 @@ impl Clean<Item> for ty::AssocItem {
                     } else {
                         hir::Constness::NotConst
                     };
+                    let asyncness = if cx.tcx.is_async_fn(self.def_id) {
+                        hir::IsAsync::Async
+                    } else {
+                        hir::IsAsync::NotAsync
+                    };
                     let defaultness = match self.container {
                         ty::ImplContainer(_) => Some(self.defaultness),
                         ty::TraitContainer(_) => None,
@@ -2414,7 +2419,7 @@ impl Clean<Item> for ty::AssocItem {
                             unsafety: sig.unsafety(),
                             abi: sig.abi(),
                             constness,
-                            asyncness: hir::IsAsync::NotAsync,
+                            asyncness,
                         },
                         defaultness,
                         all_types,