1 files changed, 280 insertions, 0 deletions
diff --git a/tests/ui/privacy/private-in-public-warn.rs b/tests/ui/privacy/private-in-public-warn.rs
new file mode 100644
index 000000000..0fa1de975
--- /dev/null
+++ b/tests/ui/privacy/private-in-public-warn.rs
@@ -0,0 +1,280 @@
+// 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)]
+#![deny(private_in_public)]
+#![allow(improper_ctypes)]
+
+mod types {
+    struct Priv;
+    pub struct Pub;
+    pub trait PubTr {
+        type Alias;
+    }
+
+    pub type Alias = Priv; //~ ERROR private type `types::Priv` in public interface
+    //~^ WARNING hard error
+    pub enum E {
+        V1(Priv), //~ ERROR private type `types::Priv` in public interface
+        //~^ WARNING hard error
+        V2 { field: Priv }, //~ ERROR private type `types::Priv` in public interface
+        //~^ WARNING hard error
+    }
+    pub trait Tr {
+        const C: Priv = Priv; //~ ERROR private type `types::Priv` in public interface
+        //~^ WARNING hard error
+        type Alias = Priv; //~ ERROR private type `types::Priv` in public interface
+        fn f1(arg: Priv) {} //~ ERROR private type `types::Priv` in public interface
+        //~^ WARNING hard error
+        fn f2() -> Priv { panic!() } //~ ERROR private type `types::Priv` in public interface
+        //~^ WARNING hard error
+    }
+    extern "C" {
+        pub static ES: Priv; //~ ERROR private type `types::Priv` in public interface
+        //~^ WARNING hard error
+        pub fn ef1(arg: Priv); //~ ERROR private type `types::Priv` in public interface
+        //~^ WARNING hard error
+        pub fn ef2() -> Priv; //~ ERROR private type `types::Priv` in public interface
+        //~^ WARNING hard error
+    }
+    impl PubTr for Pub {
+        type Alias = Priv; //~ ERROR private type `types::Priv` in public interface
+    }
+}
+
+mod traits {
+    trait PrivTr {}
+    pub struct Pub<T>(T);
+    pub trait PubTr {}
+
+    pub type Alias<T: PrivTr> = T; //~ ERROR private trait `traits::PrivTr` in public interface
+    //~| WARNING hard error
+    //~| WARNING bounds on generic parameters are not enforced in type aliases
+    pub trait Tr1: PrivTr {} //~ ERROR private trait `traits::PrivTr` in public interface
+    //~^ WARNING hard error
+    pub trait Tr2<T: PrivTr> {} //~ ERROR private trait `traits::PrivTr` in public interface
+        //~^ WARNING hard error
+    pub trait Tr3 {
+        type Alias: PrivTr;
+        //~^ ERROR private trait `traits::PrivTr` in public interface
+        //~| WARNING hard error
+        fn f<T: PrivTr>(arg: T) {} //~ ERROR private trait `traits::PrivTr` in public interface
+        //~^ WARNING hard error
+    }
+    impl<T: PrivTr> Pub<T> {} //~ ERROR private trait `traits::PrivTr` in public interface
+        //~^ WARNING hard error
+    impl<T: PrivTr> PubTr for Pub<T> {} // OK, trait impl predicates
+}
+
+mod traits_where {
+    trait PrivTr {}
+    pub struct Pub<T>(T);
+    pub trait PubTr {}
+
+    pub type Alias<T> where T: PrivTr = T;
+        //~^ ERROR private trait `traits_where::PrivTr` in public interface
+        //~| WARNING hard error
+        //~| WARNING where clauses are not enforced in type aliases
+    pub trait Tr2<T> where T: PrivTr {}
+        //~^ ERROR private trait `traits_where::PrivTr` in public interface
+        //~| WARNING hard error
+    pub trait Tr3 {
+        fn f<T>(arg: T) where T: PrivTr {}
+        //~^ ERROR private trait `traits_where::PrivTr` in public interface
+        //~| WARNING hard error
+    }
+    impl<T> Pub<T> where T: PrivTr {}
+        //~^ ERROR private trait `traits_where::PrivTr` in public interface
+        //~| WARNING hard error
+    impl<T> PubTr for Pub<T> where T: PrivTr {} // OK, trait impl predicates
+}
+
+mod generics {
+    struct Priv<T = u8>(T);
+    pub struct Pub<T = u8>(T);
+    trait PrivTr<T> {}
+    pub trait PubTr<T> {}
+
+    pub trait Tr1: PrivTr<Pub> {}
+        //~^ ERROR private trait `generics::PrivTr<generics::Pub>` in public interface
+        //~| WARNING hard error
+    pub trait Tr2: PubTr<Priv> {} //~ ERROR private type `generics::Priv` in public interface
+        //~^ WARNING hard error
+    pub trait Tr3: PubTr<[Priv; 1]> {} //~ ERROR private type `generics::Priv` in public interface
+        //~^ WARNING hard error
+    pub trait Tr4: PubTr<Pub<Priv>> {} //~ ERROR private type `generics::Priv` in public interface
+        //~^ WARNING hard error
+}
+
+mod impls {
+    struct Priv;
+    pub struct Pub;
+    trait PrivTr {
+        type Alias;
+    }
+    pub trait PubTr {
+        type Alias;
+    }
+
+    impl Priv {
+        pub fn f(arg: Priv) {} // OK
+    }
+    impl PrivTr for Priv {
+        type Alias = Priv; // OK
+    }
+    impl PubTr for Priv {
+        type Alias = Priv; // OK
+    }
+    impl PrivTr for Pub {
+        type Alias = Priv; // OK
+    }
+    impl PubTr for Pub {
+        type Alias = Priv; //~ ERROR private type `impls::Priv` in public interface
+    }
+}
+
+mod impls_generics {
+    struct Priv<T = u8>(T);
+    pub struct Pub<T = u8>(T);
+    trait PrivTr<T = u8> {
+        type Alias;
+    }
+    pub trait PubTr<T = u8> {
+        type Alias;
+    }
+
+    impl Priv<Pub> {
+        pub fn f(arg: Priv) {} // OK
+    }
+    impl Pub<Priv> {
+        pub fn f(arg: Priv) {} // OK
+    }
+    impl PrivTr<Pub> for Priv {
+        type Alias = Priv; // OK
+    }
+    impl PubTr<Priv> for Priv {
+        type Alias = Priv; // OK
+    }
+    impl PubTr for Priv<Pub> {
+        type Alias = Priv; // OK
+    }
+    impl PubTr for [Priv; 1] {
+        type Alias = Priv; // OK
+    }
+    impl PubTr for Pub<Priv> {
+        type Alias = Priv; // OK
+    }
+    impl PrivTr<Pub> for Pub {
+        type Alias = Priv; // OK
+    }
+    impl PubTr<Priv> for Pub {
+        type Alias = Priv; // OK
+    }
+}
+
+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 AssocAlias;
+    }
+    impl PrivTr for Priv {
+        type AssocAlias = m::Pub3;
+    }
+
+    pub fn f1(arg: PrivUseAlias) {} // OK
+    pub fn f2(arg: PrivAlias) {} // OK
+
+    pub trait Tr1: PrivUseAliasTr {} // OK
+    pub trait Tr2: PrivUseAliasTr<PrivAlias> {} // OK
+
+    impl PrivAlias {
+        pub fn f(arg: Priv) {} //~ ERROR private type `aliases_pub::Priv` in public interface
+        //~^ WARNING hard error
+    }
+    impl PrivUseAliasTr for PrivUseAlias {
+        type Check = Priv; //~ ERROR private type `aliases_pub::Priv` in public interface
+    }
+    impl PrivUseAliasTr for PrivAlias {
+        type Check = Priv; //~ ERROR private type `aliases_pub::Priv` in public interface
+    }
+    impl PrivUseAliasTr for <Priv as PrivTr>::AssocAlias {
+        type Check = Priv; //~ ERROR private type `aliases_pub::Priv` in public interface
+    }
+    impl PrivUseAliasTr for Option<<Priv as PrivTr>::AssocAlias> {
+        type Check = Priv; //~ ERROR private type `aliases_pub::Priv` in public interface
+    }
+    impl PrivUseAliasTr for (<Priv as PrivTr>::AssocAlias, Priv) {
+        type Check = Priv; // OK
+    }
+    impl PrivUseAliasTr for Option<(<Priv as PrivTr>::AssocAlias, Priv)> {
+        type Check = Priv; // OK
+    }
+}
+
+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 AssocAlias;
+    }
+    impl PrivTr for Priv {
+        type AssocAlias = Priv3;
+    }
+
+    pub trait Tr1: PrivUseAliasTr {}
+        //~^ ERROR private trait `PrivTr1` in public interface
+        //~| WARNING hard error
+    pub trait Tr2: PrivUseAliasTr<PrivAlias> {}
+        //~^ ERROR private trait `PrivTr1<Priv2>` in public interface
+        //~| WARNING hard error
+        //~| ERROR private type `Priv2` in public interface
+        //~| WARNING hard error
+
+    impl PrivUseAlias {
+        pub fn f(arg: Priv) {} // OK
+    }
+    impl PrivAlias {
+        pub fn f(arg: Priv) {} // OK
+    }
+    impl PrivUseAliasTr for PrivUseAlias {
+        type Check = Priv; // OK
+    }
+    impl PrivUseAliasTr for PrivAlias {
+        type Check = Priv; // OK
+    }
+    impl PrivUseAliasTr for <Priv as PrivTr>::AssocAlias {
+        type Check = Priv; // OK
+    }
+}
+
+mod aliases_params {
+    struct Priv;
+    type PrivAliasGeneric<T = Priv> = T;
+    type Result<T> = ::std::result::Result<T, Priv>;
+
+    pub fn f1(arg: PrivAliasGeneric<u8>) {} // OK, not an error
+}
+
+fn main() {}