1 files changed, 148 insertions, 0 deletions
diff --git a/tests/ui/privacy/private-in-public.rs b/tests/ui/privacy/private-in-public.rs
new file mode 100644
index 00000000000..dbd1c483f81
--- /dev/null
+++ b/tests/ui/privacy/private-in-public.rs
@@ -0,0 +1,148 @@
+// Private types and traits are not allowed in public interfaces.
+// This test also ensures that the checks are performed even inside private modules.
+
+#![feature(associated_type_defaults)]
+
+mod types {
+    struct Priv;
+    pub struct Pub;
+    pub trait PubTr {
+        type Alias;
+    }
+
+    pub const C: Priv = Priv; //~ ERROR private type `types::Priv` in public interface
+    pub static S: Priv = Priv; //~ ERROR private type `types::Priv` in public interface
+    pub fn f1(arg: Priv) {} //~ ERROR private type `types::Priv` in public interface
+    pub fn f2() -> Priv { panic!() } //~ ERROR private type `types::Priv` in public interface
+    pub struct S1(pub Priv); //~ ERROR private type `types::Priv` in public interface
+    pub struct S2 { pub field: Priv } //~ ERROR private type `types::Priv` in public interface
+    impl Pub {
+        pub const C: Priv = Priv; //~ ERROR private type `types::Priv` in public interface
+        pub fn f1(arg: Priv) {} //~ ERROR private type `types::Priv` in public interface
+        pub fn f2() -> Priv { panic!() } //~ ERROR private type `types::Priv` in public interface
+    }
+}
+
+mod traits {
+    trait PrivTr {}
+    pub struct Pub<T>(T);
+    pub trait PubTr {}
+
+    pub enum E<T: PrivTr> { V(T) } //~ ERROR private trait `traits::PrivTr` in public interface
+    pub fn f<T: PrivTr>(arg: T) {} //~ ERROR private trait `traits::PrivTr` in public interface
+    pub struct S1<T: PrivTr>(T); //~ ERROR private trait `traits::PrivTr` in public interface
+    impl<T: PrivTr> Pub<T> { //~ ERROR private trait `traits::PrivTr` in public interface
+        pub fn f<U: PrivTr>(arg: U) {} //~ ERROR private trait `traits::PrivTr` in public interface
+    }
+}
+
+mod traits_where {
+    trait PrivTr {}
+    pub struct Pub<T>(T);
+    pub trait PubTr {}
+
+    pub enum E<T> where T: PrivTr { V(T) }
+    //~^ ERROR private trait `traits_where::PrivTr` in public interface
+    pub fn f<T>(arg: T) where T: PrivTr {}
+    //~^ ERROR private trait `traits_where::PrivTr` in public interface
+    pub struct S1<T>(T) where T: PrivTr;
+    //~^ ERROR private trait `traits_where::PrivTr` in public interface
+    impl<T> Pub<T> where T: PrivTr {
+    //~^ ERROR private trait `traits_where::PrivTr` in public interface
+        pub fn f<U>(arg: U) where U: PrivTr {}
+        //~^ ERROR private trait `traits_where::PrivTr` in public interface
+    }
+}
+
+mod generics {
+    struct Priv<T = u8>(T);
+    pub struct Pub<T = u8>(T);
+    trait PrivTr<T> {}
+    pub trait PubTr<T> {}
+
+    pub fn f1(arg: [Priv; 1]) {} //~ ERROR private type `generics::Priv` in public interface
+    pub fn f2(arg: Pub<Priv>) {} //~ ERROR private type `generics::Priv` in public interface
+    pub fn f3(arg: Priv<Pub>) {}
+    //~^ ERROR private type `generics::Priv<generics::Pub>` in public interface
+}
+
+mod impls {
+    struct Priv;
+    pub struct Pub;
+    trait PrivTr {
+        type Alias;
+    }
+    pub trait PubTr {
+        type Alias;
+    }
+
+    impl Pub {
+        pub fn f(arg: Priv) {} //~ ERROR private type `impls::Priv` in public interface
+    }
+}
+
+mod aliases_pub {
+    struct Priv;
+    mod m {
+        pub struct Pub1;
+        pub struct Pub2;
+        pub struct Pub3;
+        pub trait PubTr<T = u8> {
+            type Check = u8;
+        }
+    }
+
+    use self::m::Pub1 as PrivUseAlias;
+    use self::m::PubTr as PrivUseAliasTr;
+    type PrivAlias = m::Pub2;
+    trait PrivTr {
+        type Assoc = m::Pub3;
+    }
+    impl PrivTr for Priv {}
+
+    // This should be OK, but associated type aliases are not substituted yet
+    pub fn f3(arg: <Priv as PrivTr>::Assoc) {}
+    //~^ ERROR private trait `aliases_pub::PrivTr` in public interface
+    //~| ERROR private type `aliases_pub::Priv` in public interface
+
+    impl PrivUseAlias {
+        pub fn f(arg: Priv) {} //~ ERROR private type `aliases_pub::Priv` in public interface
+    }
+}
+
+mod aliases_priv {
+    struct Priv;
+
+    struct Priv1;
+    struct Priv2;
+    struct Priv3;
+    trait PrivTr1<T = u8> {
+        type Check = u8;
+    }
+
+    use self::Priv1 as PrivUseAlias;
+    use self::PrivTr1 as PrivUseAliasTr;
+    type PrivAlias = Priv2;
+    trait PrivTr {
+        type Assoc = Priv3;
+    }
+    impl PrivTr for Priv {}
+
+    pub fn f1(arg: PrivUseAlias) {} //~ ERROR private type `Priv1` in public interface
+    pub fn f2(arg: PrivAlias) {} //~ ERROR private type `Priv2` in public interface
+    pub fn f3(arg: <Priv as PrivTr>::Assoc) {}
+    //~^ ERROR private trait `aliases_priv::PrivTr` in public interface
+    //~| ERROR private type `aliases_priv::Priv` in public interface
+}
+
+mod aliases_params {
+    struct Priv;
+    type PrivAliasGeneric<T = Priv> = T;
+    type Result<T> = ::std::result::Result<T, Priv>;
+
+    pub fn f2(arg: PrivAliasGeneric) {}
+    //~^ ERROR private type `aliases_params::Priv` in public interface
+    pub fn f3(arg: Result<u8>) {} //~ ERROR private type `aliases_params::Priv` in public interface
+}
+
+fn main() {}