Address review comments

Say "trait" instead of "type" in diagnostics for `dyn Trait`

Author: petrochenkov

src/librustc/util/ppaux.rs

@@ -709,6 +709,9 @@ define_print! {
 
 define_print! {
     ('tcx) ty::ExistentialTraitRef<'tcx>, (self, f, cx) {
+        display {
+            cx.parameterized(f, self.substs, self.def_id, &[])
+        }
         debug {
             ty::tls::with(|tcx| {
                 let dummy_self = tcx.mk_infer(ty::FreshTy(0));

src/librustc_privacy/lib.rs

@@ -9,19 +9,19 @@ mod priv_trait {
 
     pub macro mac1() {
         let _: Box<PubTr<AssocTy = u8>>;
-        //~^ ERROR type `(dyn priv_trait::PubTr<AssocTy=u8> + '<empty>)` is private
-        //~| ERROR type `(dyn priv_trait::PubTr<AssocTy=u8> + '<empty>)` is private
+        //~^ ERROR trait `priv_trait::PrivTr` is private
+        //~| ERROR trait `priv_trait::PrivTr` is private
         type InSignatureTy2 = Box<PubTr<AssocTy = u8>>;
-        //~^ ERROR type `(dyn priv_trait::PubTr<AssocTy=u8> + 'static)` is private
+        //~^ ERROR trait `priv_trait::PrivTr` is private
         trait InSignatureTr2: PubTr<AssocTy = u8> {}
         //~^ ERROR trait `priv_trait::PrivTr` is private
     }
     pub macro mac2() {
         let _: Box<PrivTr<AssocTy = u8>>;
-        //~^ ERROR type `(dyn priv_trait::PrivTr<AssocTy=u8> + '<empty>)` is private
-        //~| ERROR type `(dyn priv_trait::PrivTr<AssocTy=u8> + '<empty>)` is private
+        //~^ ERROR trait `priv_trait::PrivTr` is private
+        //~| ERROR trait `priv_trait::PrivTr` is private
         type InSignatureTy1 = Box<PrivTr<AssocTy = u8>>;
-        //~^ ERROR type `(dyn priv_trait::PrivTr<AssocTy=u8> + 'static)` is private
+        //~^ ERROR trait `priv_trait::PrivTr` is private
         trait InSignatureTr1: PrivTr<AssocTy = u8> {}
         //~^ ERROR trait `priv_trait::PrivTr` is private
     }

src/test/ui/privacy/associated-item-privacy-type-binding.rs

@@ -1,4 +1,4 @@
-error: type `(dyn priv_trait::PubTr<AssocTy=u8> + '<empty>)` is private
+error: trait `priv_trait::PrivTr` is private
   --> $DIR/associated-item-privacy-type-binding.rs:11:13
    |
 LL |         let _: Box<PubTr<AssocTy = u8>>;
@@ -7,7 +7,7 @@ LL |         let _: Box<PubTr<AssocTy = u8>>;
 LL |     priv_trait::mac1!();
    |     -------------------- in this macro invocation
 
-error: type `(dyn priv_trait::PubTr<AssocTy=u8> + '<empty>)` is private
+error: trait `priv_trait::PrivTr` is private
   --> $DIR/associated-item-privacy-type-binding.rs:11:16
    |
 LL |         let _: Box<PubTr<AssocTy = u8>>;
@@ -16,7 +16,7 @@ LL |         let _: Box<PubTr<AssocTy = u8>>;
 LL |     priv_trait::mac1!();
    |     -------------------- in this macro invocation
 
-error: type `(dyn priv_trait::PubTr<AssocTy=u8> + 'static)` is private
+error: trait `priv_trait::PrivTr` is private
   --> $DIR/associated-item-privacy-type-binding.rs:14:31
    |
 LL |         type InSignatureTy2 = Box<PubTr<AssocTy = u8>>;
@@ -34,7 +34,7 @@ LL |         trait InSignatureTr2: PubTr<AssocTy = u8> {}
 LL |     priv_trait::mac1!();
    |     -------------------- in this macro invocation
 
-error: type `(dyn priv_trait::PrivTr<AssocTy=u8> + '<empty>)` is private
+error: trait `priv_trait::PrivTr` is private
   --> $DIR/associated-item-privacy-type-binding.rs:20:13
    |
 LL |         let _: Box<PrivTr<AssocTy = u8>>;
@@ -43,7 +43,7 @@ LL |         let _: Box<PrivTr<AssocTy = u8>>;
 LL |     priv_trait::mac2!();
    |     -------------------- in this macro invocation
 
-error: type `(dyn priv_trait::PrivTr<AssocTy=u8> + '<empty>)` is private
+error: trait `priv_trait::PrivTr` is private
   --> $DIR/associated-item-privacy-type-binding.rs:20:16
    |
 LL |         let _: Box<PrivTr<AssocTy = u8>>;
@@ -52,7 +52,7 @@ LL |         let _: Box<PrivTr<AssocTy = u8>>;
 LL |     priv_trait::mac2!();
    |     -------------------- in this macro invocation
 
-error: type `(dyn priv_trait::PrivTr<AssocTy=u8> + 'static)` is private
+error: trait `priv_trait::PrivTr` is private
   --> $DIR/associated-item-privacy-type-binding.rs:23:31
    |
 LL |         type InSignatureTy1 = Box<PrivTr<AssocTy = u8>>;

src/test/ui/privacy/associated-item-privacy-type-binding.stderr

@@ -9,5 +9,5 @@ mod m {
 
 fn main() {
     m::leak_dyn_nonprincipal();
-    //~^ ERROR type `(dyn m::PubPrincipal + m::PrivNonPrincipal + 'static)` is private
+    //~^ ERROR trait `m::PrivNonPrincipal` is private
 }

src/test/ui/privacy/private-in-public-non-principal-2.rs

@@ -1,4 +1,4 @@
-error: type `(dyn m::PubPrincipal + m::PrivNonPrincipal + 'static)` is private
+error: trait `m::PrivNonPrincipal` is private
   --> $DIR/private-in-public-non-principal-2.rs:11:5
    |
 LL |     m::leak_dyn_nonprincipal();

src/test/ui/privacy/private-in-public-non-principal-2.stderr

@@ -4,7 +4,7 @@ pub trait PubPrincipal {}
 auto trait PrivNonPrincipal {}
 
 pub fn leak_dyn_nonprincipal() -> Box<PubPrincipal + PrivNonPrincipal> { loop {} }
-//~^ WARN private type `(dyn PubPrincipal + PrivNonPrincipal + 'static)` in public interface
+//~^ WARN private trait `PrivNonPrincipal` in public interface
 //~| WARN this was previously accepted
 
 #[deny(missing_docs)]

src/test/ui/privacy/private-in-public-non-principal.rs

@@ -1,4 +1,4 @@
-warning: private type `(dyn PubPrincipal + PrivNonPrincipal + 'static)` in public interface (error E0446)
+warning: private trait `PrivNonPrincipal` in public interface (error E0445)
   --> $DIR/private-in-public-non-principal.rs:6:1
    |
 LL | pub fn leak_dyn_nonprincipal() -> Box<PubPrincipal + PrivNonPrincipal> { loop {} }

src/test/ui/privacy/private-in-public-non-principal.stderr

@@ -119,7 +119,7 @@ fn main() {
     m::leak_anon2(); //~ ERROR type `m::Priv` is private
     m::leak_anon3(); //~ ERROR type `m::Priv` is private
 
-    m::leak_dyn1(); //~ ERROR type `(dyn m::Trait + 'static)` is private
+    m::leak_dyn1(); //~ ERROR trait `m::Trait` is private
     m::leak_dyn2(); //~ ERROR type `m::Priv` is private
     m::leak_dyn3(); //~ ERROR type `m::Priv` is private
 

src/test/ui/privacy/private-inferred-type.rs

@@ -160,10 +160,10 @@ error: type `m::Priv` is private
 LL |     m::leak_anon3(); //~ ERROR type `m::Priv` is private
    |     ^^^^^^^^^^^^^^^
 
-error: type `(dyn m::Trait + 'static)` is private
+error: trait `m::Trait` is private
   --> $DIR/private-inferred-type.rs:122:5
    |
-LL |     m::leak_dyn1(); //~ ERROR type `(dyn m::Trait + 'static)` is private
+LL |     m::leak_dyn1(); //~ ERROR trait `m::Trait` is private
    |     ^^^^^^^^^^^^^^
 
 error: type `m::Priv` is private