Merge tag 'debian/1.52.1+dfsg1-1_exp2' into proxmox/buster

[rustc.git] / src / test / ui / traits / item-privacy.rs

diff --git a/src/test/ui/traits/item-privacy.rs b/src/test/ui/traits/item-privacy.rs
new file mode 100644 (file)
index 0000000..38d06b9
--- /dev/null
+++ b/src/test/ui/traits/item-privacy.rs
@@ -0,0 +1,134 @@
+#![feature(associated_type_defaults)]
+
+struct S;
+
+mod method {
+    trait A {
+        fn a(&self) { }
+    }
+
+    pub trait B {
+        fn b(&self) { }
+    }
+
+    pub trait C: A + B {
+        fn c(&self) { }
+    }
+
+    impl A for ::S {}
+    impl B for ::S {}
+    impl C for ::S {}
+}
+
+mod assoc_const {
+    trait A {
+        const A: u8 = 0;
+    }
+
+    pub trait B {
+        const B: u8 = 0;
+    }
+
+    pub trait C: A + B {
+        const C: u8 = 0;
+    }
+
+    impl A for ::S {}
+    impl B for ::S {}
+    impl C for ::S {}
+}
+
+mod assoc_ty {
+    trait A {
+        type A = u8;
+    }
+
+    pub trait B {
+        type B = u8;
+    }
+
+    pub trait C: A + B {
+        type C = u8;
+    }
+
+    impl A for ::S {}
+    impl B for ::S {}
+    impl C for ::S {}
+}
+
+fn check_method() {
+    // A is private
+    // B is pub, not in scope
+    // C : A + B is pub, in scope
+    use method::C;
+
+    // Methods, method call
+    // a, b, c are resolved as trait items, their traits need to be in scope
+    S.a(); //~ ERROR no method named `a` found
+    S.b(); //~ ERROR no method named `b` found
+    S.c(); // OK
+    // a, b, c are resolved as inherent items, their traits don't need to be in scope
+    let c = &S as &dyn C;
+    c.a(); //~ ERROR associated function `a` is private
+    c.b(); // OK
+    c.c(); // OK
+
+    // Methods, UFCS
+    // a, b, c are resolved as trait items, their traits need to be in scope
+    S::a(&S);
+    //~^ ERROR no function or associated item named `a` found
+    S::b(&S);
+    //~^ ERROR no function or associated item named `b` found
+    S::c(&S); // OK
+    // a, b, c are resolved as inherent items, their traits don't need to be in scope
+    <dyn C>::a(&S); //~ ERROR associated function `a` is private
+    <dyn C>::b(&S); // OK
+    C::c(&S); // OK
+}
+
+fn check_assoc_const() {
+    // A is private
+    // B is pub, not in scope
+    // C : A + B is pub, in scope
+    use assoc_const::C;
+
+    // Associated constants
+    // A, B, C are resolved as trait items, their traits need to be in scope
+    S::A; //~ ERROR no associated item named `A` found
+    S::B; //~ ERROR no associated item named `B` found
+    S::C; // OK
+    // A, B, C are resolved as inherent items, their traits don't need to be in scope
+    <dyn C>::A; //~ ERROR associated constant `A` is private
+                //~^ ERROR the trait `assoc_const::C` cannot be made into an object
+    <dyn C>::B; // ERROR the trait `assoc_const::C` cannot be made into an object
+    C::C; // OK
+}
+
+fn check_assoc_ty<T: assoc_ty::C>() {
+    // A is private
+    // B is pub, not in scope
+    // C : A + B is pub, in scope
+    use assoc_ty::C;
+
+    // Associated types
+    // A, B, C are resolved as trait items, their traits need to be in scope, not implemented yet
+    let _: S::A; //~ ERROR ambiguous associated type
+    let _: S::B; //~ ERROR ambiguous associated type
+    let _: S::C; //~ ERROR ambiguous associated type
+    // A, B, C are resolved as inherent items, their traits don't need to be in scope
+    let _: T::A; //~ ERROR associated type `A` is private
+    let _: T::B; // OK
+    let _: T::C; // OK
+
+    // Associated types, bindings
+    let _: dyn assoc_ty::B<
+        B = u8, // OK
+    >;
+    let _: dyn C<
+        A = u8, //~ ERROR associated type `A` is private
+        B = u8, // OK
+        C = u8, // OK
+    >;
+}
+
+fn main() {}