diff --git a/clippy_lints/src/attrs.rs b/clippy_lints/src/attrs.rs
index 833739f1bd3..35cde05e7f5 100644
--- a/clippy_lints/src/attrs.rs
+++ b/clippy_lints/src/attrs.rs
@@ -12,7 +12,7 @@ use rustc_ast::ast::{AttrKind, AttrStyle, Attribute, Lit, LitKind, MetaItemKind,
 use rustc_ast::util::lev_distance::find_best_match_for_name;
 use rustc_errors::Applicability;
 use rustc_hir::{
-    Block, Expr, ExprKind, ImplItem, ImplItemKind, Item, ItemKind, StmtKind, TraitItem, TraitItemKind, TraitMethod,
+    Block, Expr, ExprKind, ImplItem, ImplItemKind, Item, ItemKind, StmtKind, TraitFn, TraitItem, TraitItemKind,
 };
 use rustc_lint::{CheckLintNameResult, EarlyContext, EarlyLintPass, LateContext, LateLintPass, LintContext};
 use rustc_session::{declare_lint_pass, declare_tool_lint};
@@ -372,15 +372,15 @@ fn is_relevant_item(cx: &LateContext<'_, '_>, item: &Item<'_>) -> bool {
 
 fn is_relevant_impl(cx: &LateContext<'_, '_>, item: &ImplItem<'_>) -> bool {
     match item.kind {
-        ImplItemKind::Method(_, eid) => is_relevant_expr(cx, cx.tcx.body_tables(eid), &cx.tcx.hir().body(eid).value),
+        ImplItemKind::Fn(_, eid) => is_relevant_expr(cx, cx.tcx.body_tables(eid), &cx.tcx.hir().body(eid).value),
         _ => false,
     }
 }
 
 fn is_relevant_trait(cx: &LateContext<'_, '_>, item: &TraitItem<'_>) -> bool {
     match item.kind {
-        TraitItemKind::Fn(_, TraitMethod::Required(_)) => true,
-        TraitItemKind::Fn(_, TraitMethod::Provided(eid)) => {
+        TraitItemKind::Fn(_, TraitFn::Required(_)) => true,
+        TraitItemKind::Fn(_, TraitFn::Provided(eid)) => {
             is_relevant_expr(cx, cx.tcx.body_tables(eid), &cx.tcx.hir().body(eid).value)
         },
         _ => false,
diff --git a/clippy_lints/src/doc.rs b/clippy_lints/src/doc.rs
index ed870850a8c..9b028cd0f76 100644
--- a/clippy_lints/src/doc.rs
+++ b/clippy_lints/src/doc.rs
@@ -191,7 +191,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for DocMarkdown {
         if self.in_trait_impl || in_external_macro(cx.tcx.sess, item.span) {
             return;
         }
-        if let hir::ImplItemKind::Method(ref sig, body_id) = item.kind {
+        if let hir::ImplItemKind::Fn(ref sig, body_id) = item.kind {
             lint_for_missing_headers(cx, item.hir_id, item.span, sig, headers, Some(body_id));
         }
     }
diff --git a/clippy_lints/src/fallible_impl_from.rs b/clippy_lints/src/fallible_impl_from.rs
index 5ed7fd49f47..06608772c8a 100644
--- a/clippy_lints/src/fallible_impl_from.rs
+++ b/clippy_lints/src/fallible_impl_from.rs
@@ -93,7 +93,7 @@ fn lint_impl_body<'a, 'tcx>(cx: &LateContext<'a, 'tcx>, impl_span: Span, impl_it
     for impl_item in impl_items {
         if_chain! {
             if impl_item.ident.name == sym!(from);
-            if let ImplItemKind::Method(_, body_id) =
+            if let ImplItemKind::Fn(_, body_id) =
                 cx.tcx.hir().impl_item(impl_item.id).kind;
             then {
                 // check the body for `begin_panic` or `unwrap`
diff --git a/clippy_lints/src/functions.rs b/clippy_lints/src/functions.rs
index 23e3371c5fb..01ced205af4 100644
--- a/clippy_lints/src/functions.rs
+++ b/clippy_lints/src/functions.rs
@@ -250,7 +250,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for Functions {
     }
 
     fn check_impl_item(&mut self, cx: &LateContext<'a, 'tcx>, item: &'tcx hir::ImplItem<'_>) {
-        if let hir::ImplItemKind::Method(ref sig, ref body_id) = item.kind {
+        if let hir::ImplItemKind::Fn(ref sig, ref body_id) = item.kind {
             let attr = must_use_attr(&item.attrs);
             if let Some(attr) = attr {
                 let fn_header_span = item.span.with_hi(sig.decl.output.span().hi());
@@ -284,7 +284,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for Functions {
                 let fn_header_span = item.span.with_hi(sig.decl.output.span().hi());
                 check_needless_must_use(cx, &sig.decl, item.hir_id, item.span, fn_header_span, attr);
             }
-            if let hir::TraitMethod::Provided(eid) = *eid {
+            if let hir::TraitFn::Provided(eid) = *eid {
                 let body = cx.tcx.hir().body(eid);
                 Self::check_raw_ptr(cx, sig.header.unsafety, &sig.decl, body, item.hir_id);
 
diff --git a/clippy_lints/src/inherent_to_string.rs b/clippy_lints/src/inherent_to_string.rs
index 24c0b1cb80e..ca8e834e347 100644
--- a/clippy_lints/src/inherent_to_string.rs
+++ b/clippy_lints/src/inherent_to_string.rs
@@ -100,7 +100,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for InherentToString {
 
         if_chain! {
             // Check if item is a method, called to_string and has a parameter 'self'
-            if let ImplItemKind::Method(ref signature, _) = impl_item.kind;
+            if let ImplItemKind::Fn(ref signature, _) = impl_item.kind;
             if impl_item.ident.name.as_str() == "to_string";
             let decl = &signature.decl;
             if decl.implicit_self.has_implicit_self();
diff --git a/clippy_lints/src/inline_fn_without_body.rs b/clippy_lints/src/inline_fn_without_body.rs
index 32032c4da88..08fc6287b77 100644
--- a/clippy_lints/src/inline_fn_without_body.rs
+++ b/clippy_lints/src/inline_fn_without_body.rs
@@ -4,7 +4,7 @@ use crate::utils::span_lint_and_then;
 use crate::utils::sugg::DiagnosticBuilderExt;
 use rustc_ast::ast::{Attribute, Name};
 use rustc_errors::Applicability;
-use rustc_hir::{TraitItem, TraitItemKind, TraitMethod};
+use rustc_hir::{TraitFn, TraitItem, TraitItemKind};
 use rustc_lint::{LateContext, LateLintPass};
 use rustc_session::{declare_lint_pass, declare_tool_lint};
 
@@ -32,7 +32,7 @@ declare_lint_pass!(InlineFnWithoutBody => [INLINE_FN_WITHOUT_BODY]);
 
 impl<'a, 'tcx> LateLintPass<'a, 'tcx> for InlineFnWithoutBody {
     fn check_trait_item(&mut self, cx: &LateContext<'a, 'tcx>, item: &'tcx TraitItem<'_>) {
-        if let TraitItemKind::Fn(_, TraitMethod::Required(_)) = item.kind {
+        if let TraitItemKind::Fn(_, TraitFn::Required(_)) = item.kind {
             check_attrs(cx, item.ident.name, &item.attrs);
         }
     }
diff --git a/clippy_lints/src/lifetimes.rs b/clippy_lints/src/lifetimes.rs
index 30ad32c8ed1..85d3e9029df 100644
--- a/clippy_lints/src/lifetimes.rs
+++ b/clippy_lints/src/lifetimes.rs
@@ -9,7 +9,7 @@ use rustc_hir::intravisit::{
 use rustc_hir::FnRetTy::Return;
 use rustc_hir::{
     BodyId, FnDecl, GenericArg, GenericBound, GenericParam, GenericParamKind, Generics, ImplItem, ImplItemKind, Item,
-    ItemKind, Lifetime, LifetimeName, ParamName, QPath, TraitBoundModifier, TraitItem, TraitItemKind, TraitMethod, Ty,
+    ItemKind, Lifetime, LifetimeName, ParamName, QPath, TraitBoundModifier, TraitFn, TraitItem, TraitItemKind, Ty,
     TyKind, WhereClause, WherePredicate,
 };
 use rustc_lint::{LateContext, LateLintPass, LintContext};
@@ -86,7 +86,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for Lifetimes {
     }
 
     fn check_impl_item(&mut self, cx: &LateContext<'a, 'tcx>, item: &'tcx ImplItem<'_>) {
-        if let ImplItemKind::Method(ref sig, id) = item.kind {
+        if let ImplItemKind::Fn(ref sig, id) = item.kind {
             let report_extra_lifetimes = trait_ref_of_method(cx, item.hir_id).is_none();
             check_fn_inner(
                 cx,
@@ -102,8 +102,8 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for Lifetimes {
     fn check_trait_item(&mut self, cx: &LateContext<'a, 'tcx>, item: &'tcx TraitItem<'_>) {
         if let TraitItemKind::Fn(ref sig, ref body) = item.kind {
             let body = match *body {
-                TraitMethod::Required(_) => None,
-                TraitMethod::Provided(id) => Some(id),
+                TraitFn::Required(_) => None,
+                TraitFn::Provided(id) => Some(id),
             };
             check_fn_inner(cx, &sig.decl, body, &item.generics, item.span, true);
         }
diff --git a/clippy_lints/src/methods/mod.rs b/clippy_lints/src/methods/mod.rs
index ab51ecfb1b5..8bba56c675f 100644
--- a/clippy_lints/src/methods/mod.rs
+++ b/clippy_lints/src/methods/mod.rs
@@ -1410,7 +1410,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for Methods {
         let def_id = cx.tcx.hir().local_def_id(item.hir_id);
         let ty = cx.tcx.type_of(def_id);
         if_chain! {
-            if let hir::ImplItemKind::Method(ref sig, id) = impl_item.kind;
+            if let hir::ImplItemKind::Fn(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{ of_trait: None, .. } = item.kind;
 
@@ -1469,7 +1469,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for Methods {
             }
         }
 
-        if let hir::ImplItemKind::Method(_, _) = impl_item.kind {
+        if let hir::ImplItemKind::Fn(_, _) = impl_item.kind {
             let ret_ty = return_ty(cx, impl_item.hir_id);
 
             // walk the return type and check for Self (this does not check associated types)
diff --git a/clippy_lints/src/missing_doc.rs b/clippy_lints/src/missing_doc.rs
index 88467f3057f..96750cb3b46 100644
--- a/clippy_lints/src/missing_doc.rs
+++ b/clippy_lints/src/missing_doc.rs
@@ -185,7 +185,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for MissingDoc {
 
         let desc = match impl_item.kind {
             hir::ImplItemKind::Const(..) => "an associated constant",
-            hir::ImplItemKind::Method(..) => "a method",
+            hir::ImplItemKind::Fn(..) => "a method",
             hir::ImplItemKind::TyAlias(_) => "an associated type",
             hir::ImplItemKind::OpaqueTy(_) => "an existential type",
         };
diff --git a/clippy_lints/src/missing_inline.rs b/clippy_lints/src/missing_inline.rs
index fad4d6d0fe2..0f871d29c2f 100644
--- a/clippy_lints/src/missing_inline.rs
+++ b/clippy_lints/src/missing_inline.rs
@@ -141,7 +141,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for MissingInline {
         }
 
         let desc = match impl_item.kind {
-            hir::ImplItemKind::Method(..) => "a method",
+            hir::ImplItemKind::Fn(..) => "a method",
             hir::ImplItemKind::Const(..) | hir::ImplItemKind::TyAlias(_) | hir::ImplItemKind::OpaqueTy(_) => return,
         };
 
diff --git a/clippy_lints/src/mut_key.rs b/clippy_lints/src/mut_key.rs
index 61f514a740a..adaf82c7074 100644
--- a/clippy_lints/src/mut_key.rs
+++ b/clippy_lints/src/mut_key.rs
@@ -59,7 +59,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for MutableKeyType {
     }
 
     fn check_impl_item(&mut self, cx: &LateContext<'a, 'tcx>, item: &'tcx hir::ImplItem<'tcx>) {
-        if let hir::ImplItemKind::Method(ref sig, ..) = item.kind {
+        if let hir::ImplItemKind::Fn(ref sig, ..) = item.kind {
             if trait_ref_of_method(cx, item.hir_id).is_none() {
                 check_sig(cx, item.hir_id, &sig.decl);
             }
diff --git a/clippy_lints/src/new_without_default.rs b/clippy_lints/src/new_without_default.rs
index 303ba1e6808..adc93909677 100644
--- a/clippy_lints/src/new_without_default.rs
+++ b/clippy_lints/src/new_without_default.rs
@@ -105,7 +105,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for NewWithoutDefault {
                     if in_external_macro(cx.sess(), impl_item.span) {
                         return;
                     }
-                    if let hir::ImplItemKind::Method(ref sig, _) = impl_item.kind {
+                    if let hir::ImplItemKind::Fn(ref sig, _) = impl_item.kind {
                         let name = impl_item.ident.name;
                         let id = impl_item.hir_id;
                         if sig.header.constness == hir::Constness::Const {
diff --git a/clippy_lints/src/ptr.rs b/clippy_lints/src/ptr.rs
index a6d62406aa7..3d420cf8cec 100644
--- a/clippy_lints/src/ptr.rs
+++ b/clippy_lints/src/ptr.rs
@@ -10,7 +10,7 @@ use rustc::ty;
 use rustc_errors::Applicability;
 use rustc_hir::{
     BinOpKind, BodyId, Expr, ExprKind, FnDecl, FnRetTy, GenericArg, HirId, ImplItem, ImplItemKind, Item, ItemKind,
-    Lifetime, MutTy, Mutability, Node, PathSegment, QPath, TraitItem, TraitItemKind, TraitMethod, Ty, TyKind,
+    Lifetime, MutTy, Mutability, Node, PathSegment, QPath, TraitFn, TraitItem, TraitItemKind, Ty, TyKind,
 };
 use rustc_lint::{LateContext, LateLintPass};
 use rustc_session::{declare_lint_pass, declare_tool_lint};
@@ -109,7 +109,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for Ptr {
     }
 
     fn check_impl_item(&mut self, cx: &LateContext<'a, 'tcx>, item: &'tcx ImplItem<'_>) {
-        if let ImplItemKind::Method(ref sig, body_id) = item.kind {
+        if let ImplItemKind::Fn(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 { of_trait: Some(_), .. } = it.kind {
@@ -122,7 +122,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for Ptr {
 
     fn check_trait_item(&mut self, cx: &LateContext<'a, 'tcx>, item: &'tcx TraitItem<'_>) {
         if let TraitItemKind::Fn(ref sig, ref trait_method) = item.kind {
-            let body_id = if let TraitMethod::Provided(b) = *trait_method {
+            let body_id = if let TraitFn::Provided(b) = *trait_method {
                 Some(b)
             } else {
                 None
diff --git a/clippy_lints/src/types.rs b/clippy_lints/src/types.rs
index d44aa492508..26d425cf241 100644
--- a/clippy_lints/src/types.rs
+++ b/clippy_lints/src/types.rs
@@ -15,8 +15,8 @@ use rustc_hir as hir;
 use rustc_hir::intravisit::{walk_body, walk_expr, walk_ty, FnKind, NestedVisitorMap, Visitor};
 use rustc_hir::{
     BinOpKind, Body, Expr, ExprKind, FnDecl, FnRetTy, FnSig, GenericArg, GenericParamKind, HirId, ImplItem,
-    ImplItemKind, Item, ItemKind, Lifetime, Local, MatchSource, MutTy, Mutability, QPath, Stmt, StmtKind, TraitItem,
-    TraitItemKind, TraitMethod, TyKind, UnOp,
+    ImplItemKind, Item, ItemKind, Lifetime, Local, MatchSource, MutTy, Mutability, QPath, Stmt, StmtKind, TraitFn,
+    TraitItem, TraitItemKind, TyKind, UnOp,
 };
 use rustc_lint::{LateContext, LateLintPass, LintContext};
 use rustc_session::{declare_lint_pass, declare_tool_lint, impl_lint_pass};
@@ -1457,7 +1457,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for TypeComplexity {
     fn check_trait_item(&mut self, cx: &LateContext<'a, 'tcx>, item: &'tcx TraitItem<'_>) {
         match item.kind {
             TraitItemKind::Const(ref ty, _) | TraitItemKind::Type(_, Some(ref ty)) => self.check_type(cx, ty),
-            TraitItemKind::Fn(FnSig { ref decl, .. }, TraitMethod::Required(_)) => self.check_fndecl(cx, decl),
+            TraitItemKind::Fn(FnSig { ref decl, .. }, TraitFn::Required(_)) => self.check_fndecl(cx, decl),
             // methods with default impl are covered by check_fn
             _ => (),
         }
diff --git a/clippy_lints/src/unused_self.rs b/clippy_lints/src/unused_self.rs
index 8579fd73fbb..a45b4a6869c 100644
--- a/clippy_lints/src/unused_self.rs
+++ b/clippy_lints/src/unused_self.rs
@@ -58,7 +58,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for UnusedSelf {
                         kind: AssocItemKind::Method { has_self: true },
                         ..
                     } = impl_item_ref;
-                    if let ImplItemKind::Method(_, body_id) = &impl_item.kind;
+                    if let ImplItemKind::Fn(_, body_id) = &impl_item.kind;
                     let body = cx.tcx.hir().body(*body_id);
                     if !body.params.is_empty();
                     then {
diff --git a/clippy_lints/src/use_self.rs b/clippy_lints/src/use_self.rs
index e1316fa0a3d..73a986b7901 100644
--- a/clippy_lints/src/use_self.rs
+++ b/clippy_lints/src/use_self.rs
@@ -195,7 +195,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for UseSelf {
                     if let Some(impl_trait_ref) = impl_trait_ref {
                         for impl_item_ref in refs {
                             let impl_item = cx.tcx.hir().impl_item(impl_item_ref.id);
-                            if let ImplItemKind::Method(FnSig{ decl: impl_decl, .. }, impl_body_id)
+                            if let ImplItemKind::Fn(FnSig{ decl: impl_decl, .. }, impl_body_id)
                                     = &impl_item.kind {
                                 let item_type = cx.tcx.type_of(impl_def_id);
                                 check_trait_method_impl_decl(cx, item_type, impl_item, impl_decl, &impl_trait_ref);
diff --git a/clippy_lints/src/utils/inspector.rs b/clippy_lints/src/utils/inspector.rs
index a2a4dc4201b..d79f6d525fc 100644
--- a/clippy_lints/src/utils/inspector.rs
+++ b/clippy_lints/src/utils/inspector.rs
@@ -62,7 +62,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for DeepCodeInspector {
                 println!("associated constant");
                 print_expr(cx, &cx.tcx.hir().body(body_id).value, 1);
             },
-            hir::ImplItemKind::Method(..) => println!("method"),
+            hir::ImplItemKind::Fn(..) => println!("method"),
             hir::ImplItemKind::TyAlias(_) => println!("associated type"),
             hir::ImplItemKind::OpaqueTy(_) => println!("existential type"),
         }
diff --git a/clippy_lints/src/utils/mod.rs b/clippy_lints/src/utils/mod.rs
index 2a8e172663d..280e8e2f32e 100644
--- a/clippy_lints/src/utils/mod.rs
+++ b/clippy_lints/src/utils/mod.rs
@@ -101,7 +101,7 @@ pub fn in_constant(cx: &LateContext<'_, '_>, id: HirId) -> bool {
             ..
         })
         | Node::ImplItem(&ImplItem {
-            kind: ImplItemKind::Method(ref sig, _),
+            kind: ImplItemKind::Fn(ref sig, _),
             ..
         }) => sig.header.constness == Constness::Const,
         _ => false,
@@ -758,7 +758,7 @@ pub fn get_enclosing_block<'a, 'tcx>(cx: &LateContext<'a, 'tcx>, hir_id: HirId)
                 ..
             })
             | Node::ImplItem(&ImplItem {
-                kind: ImplItemKind::Method(_, eid),
+                kind: ImplItemKind::Fn(_, eid),
                 ..
             }) => match cx.tcx.hir().body(eid).value.kind {
                 ExprKind::Block(ref block, _) => Some(block),