Rename trait_has_auto_impl to trait_is_auto

src/librustc/traits/select.rs

@@ -910,7 +910,7 @@ pub fn coinductive_match<I>(&mut self, cycle: I) -> bool
     fn coinductive_predicate(&self, predicate: ty::Predicate<'tcx>) -> bool {
         let result = match predicate {
             ty::Predicate::Trait(ref data) => {
-                self.tcx().trait_has_auto_impl(data.def_id())
+                self.tcx().trait_is_auto(data.def_id())
             }
             _ => {
                 false
@@ -1697,7 +1697,7 @@ fn assemble_candidates_from_auto_impls(&mut self,
 
         let def_id = obligation.predicate.def_id();
 
-        if self.tcx().trait_has_auto_impl(def_id) {
+        if self.tcx().trait_is_auto(def_id) {
             match self_ty.sty {
                 ty::TyDynamic(..) => {
                     // For object types, we don't know what the closed

src/librustc/ty/mod.rs

@@ -2308,7 +2308,10 @@ pub fn has_attr(self, did: DefId, attr: &str) -> bool {
         self.get_attrs(did).iter().any(|item| item.check_name(attr))
     }
 
-    pub fn trait_has_auto_impl(self, trait_def_id: DefId) -> bool {
+    /// Returns true if this is an `auto trait`.
+    ///
+    /// NB. For a limited time, also returns true if `impl Trait for .. { }` is in the code-base.
+    pub fn trait_is_auto(self, trait_def_id: DefId) -> bool {
         self.trait_def(trait_def_id).has_auto_impl
     }
 

src/librustc_metadata/encoder.rs

@@ -970,7 +970,7 @@ fn encode_info_for_item(&mut self, (def_id, item): (DefId, &'tcx hir::Item)) ->
                 let data = TraitData {
                     unsafety: trait_def.unsafety,
                     paren_sugar: trait_def.paren_sugar,
-                    has_auto_impl: tcx.trait_has_auto_impl(def_id),
+                    has_auto_impl: tcx.trait_is_auto(def_id),
                     super_predicates: self.lazy(&tcx.super_predicates_of(def_id)),
                 };
 

src/librustc_typeck/check/wfcheck.rs

@@ -114,7 +114,7 @@ fn check_item_well_formed(&mut self, item: &hir::Item) {
                 // FIXME(#27579) what amount of WF checking do we need for neg impls?
 
                 let trait_ref = tcx.impl_trait_ref(tcx.hir.local_def_id(item.id)).unwrap();
-                if !tcx.trait_has_auto_impl(trait_ref.def_id) {
+                if !tcx.trait_is_auto(trait_ref.def_id) {
                     error_192(tcx, item.span);
                 }
             }
@@ -318,7 +318,7 @@ fn check_auto_trait(&mut self, trait_def_id: DefId, span: Span) {
     fn check_trait(&mut self, item: &hir::Item) {
         let trait_def_id = self.tcx.hir.local_def_id(item.id);
 
-        if self.tcx.trait_has_auto_impl(trait_def_id) {
+        if self.tcx.trait_is_auto(trait_def_id) {
             self.check_auto_trait(trait_def_id, item.span);
         }
 

src/librustc_typeck/coherence/orphan.rs

@@ -100,11 +100,11 @@ fn visit_item(&mut self, item: &hir::Item) {
                 // This final impl is legal according to the orpan
                 // rules, but it invalidates the reasoning from
                 // `two_foos` above.
-                debug!("trait_ref={:?} trait_def_id={:?} trait_has_auto_impl={}",
+                debug!("trait_ref={:?} trait_def_id={:?} trait_is_auto={}",
                        trait_ref,
                        trait_def_id,
-                       self.tcx.trait_has_auto_impl(trait_def_id));
-                if self.tcx.trait_has_auto_impl(trait_def_id) &&
+                       self.tcx.trait_is_auto(trait_def_id));
+                if self.tcx.trait_is_auto(trait_def_id) &&
                    !trait_def_id.is_local() {
                     let self_ty = trait_ref.self_ty();
                     let opt_self_def_id = match self_ty.sty {