Auto merge of #5059 - JohnTitor:rustup-0118, r=llogiq

bors · bors · commit e36a33fac779 · 2020-01-18T08:10:56.000Z
Rustup to rust-lang/rust#68204 changelog: none
diff --git a/clippy_lints/src/copy_iterator.rs b/clippy_lints/src/copy_iterator.rs
@@ -33,7 +33,11 @@ declare_lint_pass!(CopyIterator => [COPY_ITERATOR]);
 
 impl<'a, 'tcx> LateLintPass<'a, 'tcx> for CopyIterator {
     fn check_item(&mut self, cx: &LateContext<'a, 'tcx>, item: &'tcx Item<'_>) {
-        if let ItemKind::Impl(_, _, _, _, Some(ref trait_ref), _, _) = item.kind {
+        if let ItemKind::Impl {
+            of_trait: Some(ref trait_ref),
+            ..
+        } = item.kind
+        {
             let ty = cx.tcx.type_of(cx.tcx.hir().local_def_id(item.hir_id));
 
             if is_copy(cx, ty) && match_path(&trait_ref.path, &paths::ITERATOR) {
diff --git a/clippy_lints/src/derive.rs b/clippy_lints/src/derive.rs
@@ -66,7 +66,11 @@ declare_lint_pass!(Derive => [EXPL_IMPL_CLONE_ON_COPY, DERIVE_HASH_XOR_EQ]);
 
 impl<'a, 'tcx> LateLintPass<'a, 'tcx> for Derive {
     fn check_item(&mut self, cx: &LateContext<'a, 'tcx>, item: &'tcx Item<'_>) {
-        if let ItemKind::Impl(_, _, _, _, Some(ref trait_ref), _, _) = item.kind {
+        if let ItemKind::Impl {
+            of_trait: Some(ref trait_ref),
+            ..
+        } = item.kind
+        {
             let ty = cx.tcx.type_of(cx.tcx.hir().local_def_id(item.hir_id));
             let is_automatically_derived = is_automatically_derived(&*item.attrs);
 
diff --git a/clippy_lints/src/doc.rs b/clippy_lints/src/doc.rs
@@ -159,15 +159,18 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for DocMarkdown {
                     lint_for_missing_headers(cx, item.hir_id, item.span, sig, headers);
                 }
             },
-            hir::ItemKind::Impl(_, _, _, _, ref trait_ref, ..) => {
+            hir::ItemKind::Impl {
+                of_trait: ref trait_ref,
+                ..
+            } => {
                 self.in_trait_impl = trait_ref.is_some();
             },
             _ => {},
         }
     }
 
     fn check_item_post(&mut self, _cx: &LateContext<'a, 'tcx>, item: &'tcx hir::Item<'_>) {
-        if let hir::ItemKind::Impl(..) = item.kind {
+        if let hir::ItemKind::Impl { .. } = item.kind {
             self.in_trait_impl = false;
         }
     }
diff --git a/clippy_lints/src/escape.rs b/clippy_lints/src/escape.rs
@@ -64,7 +64,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for BoxedLocal {
         let parent_node = cx.tcx.hir().find(parent_id);
 
         if let Some(Node::Item(item)) = parent_node {
-            if let ItemKind::Impl(_, _, _, _, Some(..), _, _) = item.kind {
+            if let ItemKind::Impl { of_trait: Some(_), .. } = item.kind {
                 return;
             }
         }
diff --git a/clippy_lints/src/fallible_impl_from.rs b/clippy_lints/src/fallible_impl_from.rs
@@ -36,7 +36,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for FallibleImplFrom {
         // check for `impl From<???> for ..`
         let impl_def_id = cx.tcx.hir().local_def_id(item.hir_id);
         if_chain! {
-            if let hir::ItemKind::Impl(.., impl_items) = item.kind;
+            if let hir::ItemKind::Impl{ items: impl_items, .. } = item.kind;
             if let Some(impl_trait_ref) = cx.tcx.impl_trait_ref(impl_def_id);
             if match_def_path(cx, impl_trait_ref.def_id, &FROM_TRAIT);
             then {
diff --git a/clippy_lints/src/functions.rs b/clippy_lints/src/functions.rs
@@ -196,7 +196,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for Functions {
         hir_id: hir::HirId,
     ) {
         let is_impl = if let Some(hir::Node::Item(item)) = cx.tcx.hir().find(cx.tcx.hir().get_parent_node(hir_id)) {
-            matches!(item.kind, hir::ItemKind::Impl(_, _, _, _, Some(_), _, _))
+            matches!(item.kind, hir::ItemKind::Impl{ of_trait: Some(_), .. })
         } else {
             false
         };
diff --git a/clippy_lints/src/inherent_impl.rs b/clippy_lints/src/inherent_impl.rs
@@ -49,7 +49,12 @@ impl_lint_pass!(MultipleInherentImpl => [MULTIPLE_INHERENT_IMPL]);
 
 impl<'a, 'tcx> LateLintPass<'a, 'tcx> for MultipleInherentImpl {
     fn check_item(&mut self, _: &LateContext<'a, 'tcx>, item: &'tcx Item<'_>) {
-        if let ItemKind::Impl(_, _, _, ref generics, None, _, _) = item.kind {
+        if let ItemKind::Impl {
+            ref generics,
+            of_trait: None,
+            ..
+        } = item.kind
+        {
             // Remember for each inherent implementation encoutered its span and generics
             // but filter out implementations that have generic params (type or lifetime)
             // or are derived from a macro
diff --git a/clippy_lints/src/len_zero.rs b/clippy_lints/src/len_zero.rs
@@ -78,7 +78,11 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for LenZero {
 
         match item.kind {
             ItemKind::Trait(_, _, _, _, ref trait_items) => check_trait_items(cx, item, trait_items),
-            ItemKind::Impl(_, _, _, _, None, _, ref impl_items) => check_impl_items(cx, item, impl_items),
+            ItemKind::Impl {
+                of_trait: None,
+                items: ref impl_items,
+                ..
+            } => check_impl_items(cx, item, impl_items),
             _ => (),
         }
     }
diff --git a/clippy_lints/src/methods/mod.rs b/clippy_lints/src/methods/mod.rs
@@ -1335,7 +1335,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for Methods {
         if_chain! {
             if let hir::ImplItemKind::Method(ref sig, id) = impl_item.kind;
             if let Some(first_arg) = iter_input_pats(&sig.decl, cx.tcx.hir().body(id)).next();
-            if let hir::ItemKind::Impl(_, _, _, _, None, _, _) = item.kind;
+            if let hir::ItemKind::Impl{ of_trait: None, .. } = item.kind;
 
             let method_def_id = cx.tcx.hir().local_def_id(impl_item.hir_id);
             let method_sig = cx.tcx.fn_sig(method_def_id);
diff --git a/clippy_lints/src/missing_doc.rs b/clippy_lints/src/missing_doc.rs
@@ -154,7 +154,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for MissingDoc {
             hir::ItemKind::ExternCrate(..)
             | hir::ItemKind::ForeignMod(..)
             | hir::ItemKind::GlobalAsm(..)
-            | hir::ItemKind::Impl(..)
+            | hir::ItemKind::Impl { .. }
             | hir::ItemKind::Use(..) => return,
         };
 
diff --git a/clippy_lints/src/missing_inline.rs b/clippy_lints/src/missing_inline.rs
@@ -124,7 +124,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for MissingInline {
             | hir::ItemKind::OpaqueTy(..)
             | hir::ItemKind::ExternCrate(..)
             | hir::ItemKind::ForeignMod(..)
-            | hir::ItemKind::Impl(..)
+            | hir::ItemKind::Impl { .. }
             | hir::ItemKind::Use(..) => {},
         };
     }
diff --git a/clippy_lints/src/needless_pass_by_value.rs b/clippy_lints/src/needless_pass_by_value.rs
@@ -91,7 +91,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for NeedlessPassByValue {
 
         // Exclude non-inherent impls
         if let Some(Node::Item(item)) = cx.tcx.hir().find(cx.tcx.hir().get_parent_node(hir_id)) {
-            if matches!(item.kind, ItemKind::Impl(_, _, _, _, Some(_), _, _) |
+            if matches!(item.kind, ItemKind::Impl{ of_trait: Some(_), .. } |
                 ItemKind::Trait(..))
             {
                 return;
diff --git a/clippy_lints/src/new_without_default.rs b/clippy_lints/src/new_without_default.rs
@@ -93,8 +93,12 @@ pub struct NewWithoutDefault {
 impl_lint_pass!(NewWithoutDefault => [NEW_WITHOUT_DEFAULT]);
 
 impl<'a, 'tcx> LateLintPass<'a, 'tcx> for NewWithoutDefault {
+    #[allow(clippy::too_many_lines)]
     fn check_item(&mut self, cx: &LateContext<'a, 'tcx>, item: &'tcx hir::Item<'_>) {
-        if let hir::ItemKind::Impl(_, _, _, _, None, _, items) = item.kind {
+        if let hir::ItemKind::Impl {
+            of_trait: None, items, ..
+        } = item.kind
+        {
             for assoc_item in items {
                 if let hir::AssocItemKind::Method { has_self: false } = assoc_item.kind {
                     let impl_item = cx.tcx.hir().impl_item(assoc_item.id);
diff --git a/clippy_lints/src/non_copy_const.rs b/clippy_lints/src/non_copy_const.rs
@@ -168,7 +168,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for NonCopyConst {
             let item_hir_id = cx.tcx.hir().get_parent_node(impl_item.hir_id);
             let item = cx.tcx.hir().expect_item(item_hir_id);
             // Ensure the impl is an inherent impl.
-            if let ItemKind::Impl(_, _, _, _, None, _, _) = item.kind {
+            if let ItemKind::Impl { of_trait: None, .. } = item.kind {
                 let ty = hir_ty_to_ty(cx.tcx, hir_ty);
                 verify_ty_bound(
                     cx,
diff --git a/clippy_lints/src/partialeq_ne_impl.rs b/clippy_lints/src/partialeq_ne_impl.rs
@@ -33,7 +33,7 @@ declare_lint_pass!(PartialEqNeImpl => [PARTIALEQ_NE_IMPL]);
 impl<'a, 'tcx> LateLintPass<'a, 'tcx> for PartialEqNeImpl {
     fn check_item(&mut self, cx: &LateContext<'a, 'tcx>, item: &'tcx Item<'_>) {
         if_chain! {
-            if let ItemKind::Impl(_, _, _, _, Some(ref trait_ref), _, impl_items) = item.kind;
+            if let ItemKind::Impl{ of_trait: Some(ref trait_ref), items: impl_items, .. } = item.kind;
             if !is_automatically_derived(&*item.attrs);
             if let Some(eq_trait) = cx.tcx.lang_items().eq_trait();
             if trait_ref.path.res.def_id() == eq_trait;
diff --git a/clippy_lints/src/ptr.rs b/clippy_lints/src/ptr.rs
@@ -110,7 +110,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for Ptr {
         if let ImplItemKind::Method(ref sig, body_id) = item.kind {
             let parent_item = cx.tcx.hir().get_parent_item(item.hir_id);
             if let Some(Node::Item(it)) = cx.tcx.hir().find(parent_item) {
-                if let ItemKind::Impl(_, _, _, _, Some(_), _, _) = it.kind {
+                if let ItemKind::Impl { of_trait: Some(_), .. } = it.kind {
                     return; // ignore trait impls
                 }
             }
diff --git a/clippy_lints/src/serde_api.rs b/clippy_lints/src/serde_api.rs
@@ -22,7 +22,12 @@ declare_lint_pass!(SerdeAPI => [SERDE_API_MISUSE]);
 
 impl<'a, 'tcx> LateLintPass<'a, 'tcx> for SerdeAPI {
     fn check_item(&mut self, cx: &LateContext<'a, 'tcx>, item: &'tcx Item<'_>) {
-        if let ItemKind::Impl(_, _, _, _, Some(ref trait_ref), _, items) = item.kind {
+        if let ItemKind::Impl {
+            of_trait: Some(ref trait_ref),
+            items,
+            ..
+        } = item.kind
+        {
             let did = trait_ref.path.res.def_id();
             if let Some(visit_did) = get_trait_def_id(cx, &paths::SERDE_DE_VISITOR) {
                 if did == visit_did {
diff --git a/clippy_lints/src/trivially_copy_pass_by_ref.rs b/clippy_lints/src/trivially_copy_pass_by_ref.rs
@@ -167,7 +167,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for TriviallyCopyPassByRef {
 
         // Exclude non-inherent impls
         if let Some(Node::Item(item)) = cx.tcx.hir().find(cx.tcx.hir().get_parent_node(hir_id)) {
-            if matches!(item.kind, ItemKind::Impl(_, _, _, _, Some(_), _, _) |
+            if matches!(item.kind, ItemKind::Impl{ of_trait: Some(_), .. } |
                 ItemKind::Trait(..))
             {
                 return;
diff --git a/clippy_lints/src/types.rs b/clippy_lints/src/types.rs
@@ -181,7 +181,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for Types {
     ) {
         // Skip trait implementations; see issue #605.
         if let Some(hir::Node::Item(item)) = cx.tcx.hir().find(cx.tcx.hir().get_parent_item(id)) {
-            if let ItemKind::Impl(_, _, _, _, Some(..), _, _) = item.kind {
+            if let ItemKind::Impl { of_trait: Some(_), .. } = item.kind {
                 return;
             }
         }
@@ -2106,7 +2106,12 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for ImplicitHasher {
         }
 
         match item.kind {
-            ItemKind::Impl(_, _, _, ref generics, _, ref ty, ref items) => {
+            ItemKind::Impl {
+                ref generics,
+                self_ty: ref ty,
+                ref items,
+                ..
+            } => {
                 let mut vis = ImplicitHasherTypeVisitor::new(cx);
                 vis.visit_ty(ty);
 
diff --git a/clippy_lints/src/unused_self.rs b/clippy_lints/src/unused_self.rs
@@ -44,7 +44,12 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for UnusedSelf {
         if item.span.from_expansion() {
             return;
         }
-        if let ItemKind::Impl(_, _, _, _, None, _, impl_item_refs) = item.kind {
+        if let ItemKind::Impl {
+            of_trait: None,
+            items: impl_item_refs,
+            ..
+        } = item.kind
+        {
             for impl_item_ref in impl_item_refs {
                 if_chain! {
                     if let ImplItemRef {
diff --git a/clippy_lints/src/use_self.rs b/clippy_lints/src/use_self.rs
@@ -173,7 +173,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for UseSelf {
             return;
         }
         if_chain! {
-            if let ItemKind::Impl(.., ref item_type, refs) = item.kind;
+            if let ItemKind::Impl{ self_ty: ref item_type, items: refs, .. } = item.kind;
             if let TyKind::Path(QPath::Resolved(_, ref item_path)) = item_type.kind;
             then {
                 let parameters = &item_path.segments.last().expect(SEGMENTS_MSG).args;
@@ -269,7 +269,7 @@ impl<'a, 'tcx> Visitor<'tcx> for UseSelfVisitor<'a, 'tcx> {
             | ItemKind::Enum(..)
             | ItemKind::Struct(..)
             | ItemKind::Union(..)
-            | ItemKind::Impl(..)
+            | ItemKind::Impl { .. }
             | ItemKind::Fn(..) => {
                 // Don't check statements that shadow `Self` or where `Self` can't be used
             },
diff --git a/clippy_lints/src/utils/inspector.rs b/clippy_lints/src/utils/inspector.rs
@@ -388,10 +388,13 @@ fn print_item(cx: &LateContext<'_, '_>, item: &hir::Item<'_>) {
         hir::ItemKind::TraitAlias(..) => {
             println!("trait alias");
         },
-        hir::ItemKind::Impl(_, _, _, _, Some(ref _trait_ref), _, _) => {
+        hir::ItemKind::Impl {
+            of_trait: Some(ref _trait_ref),
+            ..
+        } => {
             println!("trait impl");
         },
-        hir::ItemKind::Impl(_, _, _, _, None, _, _) => {
+        hir::ItemKind::Impl { of_trait: None, .. } => {
             println!("impl");
         },
     }
diff --git a/clippy_lints/src/utils/internal_lints.rs b/clippy_lints/src/utils/internal_lints.rs
@@ -219,7 +219,12 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for LintWithoutLintPass {
         } else if is_expn_of(item.span, "impl_lint_pass").is_some()
             || is_expn_of(item.span, "declare_lint_pass").is_some()
         {
-            if let hir::ItemKind::Impl(.., None, _, ref impl_item_refs) = item.kind {
+            if let hir::ItemKind::Impl {
+                of_trait: None,
+                items: ref impl_item_refs,
+                ..
+            } = item.kind
+            {
                 let mut collector = LintCollector {
                     output: &mut self.registered_lints,
                     cx,
diff --git a/clippy_lints/src/utils/mod.rs b/clippy_lints/src/utils/mod.rs
@@ -357,7 +357,7 @@ pub fn trait_ref_of_method<'tcx>(cx: &LateContext<'_, 'tcx>, hir_id: HirId) -> O
     if_chain! {
         if parent_impl != hir::CRATE_HIR_ID;
         if let hir::Node::Item(item) = cx.tcx.hir().get(parent_impl);
-        if let hir::ItemKind::Impl(_, _, _, _, trait_ref, _, _) = &item.kind;
+        if let hir::ItemKind::Impl{ of_trait: trait_ref, .. } = &item.kind;
         then { return trait_ref.as_ref(); }
     }
     None

Original file line number	Diff line number	Diff line change
`@@ -159,15 +159,18 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for DocMarkdown {`
`159`	`159`	`lint_for_missing_headers(cx, item.hir_id, item.span, sig, headers);`
`160`	`160`	`}`
`161`	`161`	`},`
`162`		`- hir::ItemKind::Impl(_, _, _, _, ref trait_ref, ..) => {`
	`162`	`+ hir::ItemKind::Impl {`
	`163`	`+ of_trait: ref trait_ref,`
	`164`	`+ ..`
	`165`	`+ } => {`
`163`	`166`	`self.in_trait_impl = trait_ref.is_some();`
`164`	`167`	`},`
`165`	`168`	`_ => {},`
`166`	`169`	`}`
`167`	`170`	`}`
`168`	`171`
`169`	`172`	`fn check_item_post(&mut self, _cx: &LateContext<'a, 'tcx>, item: &'tcx hir::Item<'_>) {`
`170`		`- if let hir::ItemKind::Impl(..) = item.kind {`
	`173`	`+ if let hir::ItemKind::Impl { .. } = item.kind {`
`171`	`174`	`self.in_trait_impl = false;`
`172`	`175`	`}`
`173`	`176`	`}`
Original file line number	Diff line number	Diff line change
`@@ -64,7 +64,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for BoxedLocal {`
`64`	`64`	`let parent_node = cx.tcx.hir().find(parent_id);`
`65`	`65`
`66`	`66`	`if let Some(Node::Item(item)) = parent_node {`
`67`		`- if let ItemKind::Impl(_, _, _, _, Some(..), _, _) = item.kind {`
	`67`	`+ if let ItemKind::Impl { of_trait: Some(_), .. } = item.kind {`
`68`	`68`	`return;`
`69`	`69`	`}`
`70`	`70`	`}`
Original file line number	Diff line number	Diff line change
`@@ -78,7 +78,11 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for LenZero {`
`78`	`78`
`79`	`79`	`match item.kind {`
`80`	`80`	`ItemKind::Trait(_, _, _, _, ref trait_items) => check_trait_items(cx, item, trait_items),`
`81`		`- ItemKind::Impl(_, _, _, _, None, _, ref impl_items) => check_impl_items(cx, item, impl_items),`
	`81`	`+ ItemKind::Impl {`
	`82`	`+ of_trait: None,`
	`83`	`+ items: ref impl_items,`
	`84`	`+ ..`
	`85`	`+ } => check_impl_items(cx, item, impl_items),`
`82`	`86`	`_ => (),`
`83`	`87`	`}`
`84`	`88`	`}`
Original file line number	Diff line number	Diff line change
`@@ -124,7 +124,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for MissingInline {`
`124`	`124`	`\| hir::ItemKind::OpaqueTy(..)`
`125`	`125`	`\| hir::ItemKind::ExternCrate(..)`
`126`	`126`	`\| hir::ItemKind::ForeignMod(..)`
`127`		`- \| hir::ItemKind::Impl(..)`
	`127`	`+ \| hir::ItemKind::Impl { .. }`
`128`	`128`	`\| hir::ItemKind::Use(..) => {},`
`129`	`129`	`};`
`130`	`130`	`}`
Original file line number	Diff line number	Diff line change
`@@ -91,7 +91,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for NeedlessPassByValue {`
`91`	`91`
`92`	`92`	`// Exclude non-inherent impls`
`93`	`93`	`if let Some(Node::Item(item)) = cx.tcx.hir().find(cx.tcx.hir().get_parent_node(hir_id)) {`
`94`		`- if matches!(item.kind, ItemKind::Impl(_, _, _, _, Some(_), _, _) \|`
	`94`	`+ if matches!(item.kind, ItemKind::Impl{ of_trait: Some(_), .. } \|`
`95`	`95`	`ItemKind::Trait(..))`
`96`	`96`	`{`
`97`	`97`	`return;`
Original file line number	Diff line number	Diff line change
`@@ -110,7 +110,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for Ptr {`
`110`	`110`	`if let ImplItemKind::Method(ref sig, body_id) = item.kind {`
`111`	`111`	`let parent_item = cx.tcx.hir().get_parent_item(item.hir_id);`
`112`	`112`	`if let Some(Node::Item(it)) = cx.tcx.hir().find(parent_item) {`
`113`		`- if let ItemKind::Impl(_, _, _, _, Some(_), _, _) = it.kind {`
	`113`	`+ if let ItemKind::Impl { of_trait: Some(_), .. } = it.kind {`
`114`	`114`	`return; // ignore trait impls`
`115`	`115`	`}`
`116`	`116`	`}`
Original file line number	Diff line number	Diff line change
`@@ -167,7 +167,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for TriviallyCopyPassByRef {`
`167`	`167`
`168`	`168`	`// Exclude non-inherent impls`
`169`	`169`	`if let Some(Node::Item(item)) = cx.tcx.hir().find(cx.tcx.hir().get_parent_node(hir_id)) {`
`170`		`- if matches!(item.kind, ItemKind::Impl(_, _, _, _, Some(_), _, _) \|`
	`170`	`+ if matches!(item.kind, ItemKind::Impl{ of_trait: Some(_), .. } \|`
`171`	`171`	`ItemKind::Trait(..))`
`172`	`172`	`{`
`173`	`173`	`return;`
Original file line number	Diff line number	Diff line change
`@@ -357,7 +357,7 @@ pub fn trait_ref_of_method<'tcx>(cx: &LateContext<'_, 'tcx>, hir_id: HirId) -> O`
`357`	`357`	`if_chain! {`
`358`	`358`	`if parent_impl != hir::CRATE_HIR_ID;`
`359`	`359`	`if let hir::Node::Item(item) = cx.tcx.hir().get(parent_impl);`
`360`		`- if let hir::ItemKind::Impl(_, _, _, _, trait_ref, _, _) = &item.kind;`
	`360`	`+ if let hir::ItemKind::Impl{ of_trait: trait_ref, .. } = &item.kind;`
`361`	`361`	`then { return trait_ref.as_ref(); }`
`362`	`362`	`}`
`363`	`363`	`None`