Add tests

Author: tiif

tests/ui/unstable-feature_bound/auxiliary/unstable_feature.rs

@@ -0,0 +1,25 @@
+#![allow(internal_features)]
+#![feature(staged_api)]
+#![stable(feature = "a", since = "1.1.1" )]
+
+#[stable(feature = "a", since = "1.1.1" )]
+pub trait Foo {
+    #[stable(feature = "a", since = "1.1.1" )]
+    fn foo();
+}
+#[stable(feature = "a", since = "1.1.1" )]
+pub struct Bar;
+#[stable(feature = "a", since = "1.1.1" )]
+pub struct Moo;
+
+#[unstable_feature_bound(feat_bar)]
+#[unstable(feature = "feat_bar", issue = "none" )]
+impl Foo for Bar {
+    fn foo() {}
+}
+
+#[unstable_feature_bound(feat_moo)]
+#[unstable(feature = "feat_moo", issue = "none" )]
+impl Foo for Moo {
+    fn foo() {}
+}

tests/ui/unstable-feature_bound/auxiliary/unstable_impl_codegen_aux1.rs

@@ -0,0 +1,19 @@
+#![allow(internal_features)]
+#![feature(staged_api)]
+#![stable(feature = "a", since = "1.1.1" )]
+
+/// Aux crate for unstable impl codegen test.
+
+#[stable(feature = "a", since = "1.1.1" )]
+pub trait Trait {
+    #[stable(feature = "a", since = "1.1.1" )]
+    fn method(&self);
+}
+
+#[unstable_feature_bound(foo)]
+#[unstable(feature = "foo", issue = "none" )]
+impl<T> Trait for T {
+    fn method(&self) {
+        println!("hi");
+    }
+}

tests/ui/unstable-feature_bound/auxiliary/unstable_impl_codegen_aux2.rs

@@ -0,0 +1,13 @@
+//@ aux-build:unstable_impl_codegen_aux1.rs
+#![feature(foo)]
+
+extern crate unstable_impl_codegen_aux1 as aux;
+use aux::Trait;
+
+/// Upstream crate for unstable impl codegen test
+/// that depends on aux crate in
+/// unstable_impl_codegen_aux1.rs
+
+pub fn foo<T>(a:T) {
+    a.method();
+}

tests/ui/unstable-feature_bound/auxiliary/unstable_impl_coherence_aux.rs

@@ -0,0 +1,14 @@
+#![allow(internal_features)]
+#![feature(staged_api)]
+#![allow(dead_code)]
+#![stable(feature = "a", since = "1.1.1" )]
+
+#[stable(feature = "a", since = "1.1.1" )]
+pub trait Trait {}
+
+#[unstable_feature_bound(foo)]
+#[unstable(feature = "foo", issue = "none" )]
+impl <T> Trait for T {}
+
+fn main() {
+}

tests/ui/unstable-feature_bound/unstable-feature-bound-two-error.rs

@@ -0,0 +1,12 @@
+//@ aux-build:unstable_feature.rs
+extern crate unstable_feature;
+use unstable_feature::{Foo, Bar, Moo};
+
+// FIXME: both `feat_bar`` and `feat_moo` are needed to pass this test,
+// but the diagnostic only will point out `feat_bar`.
+
+fn main() {
+    Bar::foo();
+    //~^ ERROR: type annotations needed: cannot satisfy `unstable feature: `feat_bar``
+    Moo::foo();
+}

tests/ui/unstable-feature_bound/unstable-feature-bound-two-error.stderr

@@ -0,0 +1,11 @@
+error[E0284]: type annotations needed: cannot satisfy `unstable feature: `feat_bar``
+  --> $DIR/unstable-feature-bound-two-error.rs:9:5
+   |
+LL |     Bar::foo();
+   |     ^^^ cannot satisfy `unstable feature: `feat_bar``
+   |
+   = note: required for `Bar` to implement `Foo`
+
+error: aborting due to 1 previous error
+
+For more information about this error, try `rustc --explain E0284`.

tests/ui/unstable-feature_bound/unstable-feature-cross-crate-exact-symbol.fail.stderr

@@ -0,0 +1,11 @@
+error[E0284]: type annotations needed: cannot satisfy `unstable feature: `feat_moo``
+  --> $DIR/unstable-feature-cross-crate-exact-symbol.rs:16:5
+   |
+LL |     Moo::foo();
+   |     ^^^ cannot satisfy `unstable feature: `feat_moo``
+   |
+   = note: required for `Moo` to implement `Foo`
+
+error: aborting due to 1 previous error
+
+For more information about this error, try `rustc --explain E0284`.

tests/ui/unstable-feature_bound/unstable-feature-cross-crate-exact-symbol.rs

@@ -0,0 +1,18 @@
+//@ aux-build:unstable_feature.rs
+//@ revisions: pass fail
+//@[pass] check-pass
+
+#![cfg_attr(pass, feature(feat_bar, feat_moo))]
+#![cfg_attr(fail, feature(feat_bar))]
+
+extern crate unstable_feature;
+use unstable_feature::{Foo, Bar, Moo};
+
+/// To use impls gated by both `feat_foo` and `feat_moo`,
+/// both features must be enabled.
+
+fn main() {
+    Bar::foo();
+    Moo::foo();
+    //[fail]~^ ERROR: type annotations needed: cannot satisfy `unstable feature: `feat_moo``
+}

tests/ui/unstable-feature_bound/unstable-feature-cross-crate-multiple-symbol.rs

@@ -0,0 +1,11 @@
+//@ aux-build:unstable_feature.rs
+//@ check-pass
+#![feature(feat_bar, feat_moo)]
+extern crate unstable_feature;
+use unstable_feature::{Foo, Bar, Moo};
+
+/// Bar::foo() should still be usable even if we enable multiple feature.
+
+fn main() {
+    Bar::foo();
+}

tests/ui/unstable-feature_bound/unstable-feature-cross-crate-require-bound.fail.stderr

@@ -0,0 +1,11 @@
+error[E0284]: type annotations needed: cannot satisfy `unstable feature: `feat_bar``
+  --> $DIR/unstable-feature-cross-crate-require-bound.rs:12:5
+   |
+LL |     Bar::foo();
+   |     ^^^ cannot satisfy `unstable feature: `feat_bar``
+   |
+   = note: required for `Bar` to implement `Foo`
+
+error: aborting due to 1 previous error
+
+For more information about this error, try `rustc --explain E0284`.