auto merge of #19953 : sanxiyn/rust/privacy-span, r=alexcrichton

Fix #19062.

Author: bors

src/librustc/middle/privacy.rs

@@ -1307,13 +1307,13 @@ impl<'a, 'tcx> VisiblePrivateTypesVisitor<'a, 'tcx> {
     }
 
     fn check_ty_param_bound(&self,
-                            span: Span,
                             ty_param_bound: &ast::TyParamBound) {
         if let ast::TraitTyParamBound(ref trait_ref) = *ty_param_bound {
             if !self.tcx.sess.features.borrow().visible_private_types &&
                 self.path_is_private_type(trait_ref.trait_ref.ref_id) {
+                    let span = trait_ref.trait_ref.path.span;
                     self.tcx.sess.span_err(span,
-                                           "private type in exported type \
+                                           "private trait in exported type \
                                             parameter bound");
             }
         }
@@ -1357,7 +1357,7 @@ impl<'a, 'tcx, 'v> Visitor<'v> for VisiblePrivateTypesVisitor<'a, 'tcx> {
                 }
 
                 for bound in bounds.iter() {
-                    self.check_ty_param_bound(item.span, bound)
+                    self.check_ty_param_bound(bound)
                 }
             }
 
@@ -1495,14 +1495,14 @@ impl<'a, 'tcx, 'v> Visitor<'v> for VisiblePrivateTypesVisitor<'a, 'tcx> {
     fn visit_generics(&mut self, generics: &ast::Generics) {
         for ty_param in generics.ty_params.iter() {
             for bound in ty_param.bounds.iter() {
-                self.check_ty_param_bound(ty_param.span, bound)
+                self.check_ty_param_bound(bound)
             }
         }
         for predicate in generics.where_clause.predicates.iter() {
             match predicate {
                 &ast::WherePredicate::BoundPredicate(ref bound_pred) => {
                     for bound in bound_pred.bounds.iter() {
-                        self.check_ty_param_bound(bound_pred.span, bound)
+                        self.check_ty_param_bound(bound)
                     }
                 }
                 &ast::WherePredicate::RegionPredicate(_) => {}

src/test/compile-fail/visible-private-types-generics.rs

@@ -10,17 +10,56 @@
 
 trait Foo {}
 
-pub fn f<T:Foo>() {}    //~ ERROR private type in exported type
+pub fn f<
+    T
+    : Foo //~ ERROR private trait in exported type parameter bound
+>() {}
 
-pub fn g<T>() where T: Foo {}   //~ ERROR private type in exported type
+pub fn g<T>() where
+    T
+    : Foo //~ ERROR private trait in exported type parameter bound
+{}
 
-pub struct H<T:Foo> {   //~ ERROR private type in exported type
-    x: T,
+pub struct S;
+
+impl S {
+    pub fn f<
+        T
+        : Foo //~ ERROR private trait in exported type parameter bound
+    >() {}
+
+    pub fn g<T>() where
+        T
+        : Foo //~ ERROR private trait in exported type parameter bound
+    {}
 }
 
-pub struct I<T> where T: Foo {  //~ ERROR private type in exported type
-    x: T,
+pub struct S1<
+    T
+    : Foo //~ ERROR private trait in exported type parameter bound
+> {
+    x: T
 }
 
-fn main() {}
+pub struct S2<T> where
+    T
+    : Foo //~ ERROR private trait in exported type parameter bound
+{
+    x: T
+}
 
+pub enum E1<
+    T
+    : Foo //~ ERROR private trait in exported type parameter bound
+> {
+    V1(T)
+}
+
+pub enum E2<T> where
+    T
+    : Foo //~ ERROR private trait in exported type parameter bound
+{
+    V2(T)
+}
+
+fn main() {}

src/test/compile-fail/visible-private-types-supertrait.rs

@@ -10,7 +10,6 @@
 
 trait Foo {}
 
-pub trait Bar : Foo {}  //~ ERROR private type in exported type
+pub trait Bar : Foo {} //~ ERROR private trait in exported type
 
 fn main() {}
-