1 files changed, 71 insertions, 0 deletions
diff --git a/tests/ui/compare-method/traits-misc-mismatch-1.rs b/tests/ui/compare-method/traits-misc-mismatch-1.rs
new file mode 100644
index 00000000000..0da4aba303c
--- /dev/null
+++ b/tests/ui/compare-method/traits-misc-mismatch-1.rs
@@ -0,0 +1,71 @@
+//
+// Make sure rustc checks the type parameter bounds in implementations of traits,
+// see #2687
+
+use std::marker;
+
+trait A { }
+
+trait B: A {}
+
+trait C: A {}
+
+trait Foo {
+    fn test_error1_fn<T: Eq>(&self);
+    fn test_error2_fn<T: Eq + Ord>(&self);
+    fn test_error3_fn<T: Eq + Ord>(&self);
+    fn test3_fn<T: Eq + Ord>(&self);
+    fn test4_fn<T: Eq + Ord>(&self);
+    fn test_error5_fn<T: A>(&self);
+    fn test6_fn<T: A + Eq>(&self);
+    fn test_error7_fn<T: A>(&self);
+    fn test_error8_fn<T: B>(&self);
+}
+
+impl Foo for isize {
+    // invalid bound for T, was defined as Eq in trait
+    fn test_error1_fn<T: Ord>(&self) {}
+    //~^ ERROR E0276
+
+    // invalid bound for T, was defined as Eq + Ord in trait
+    fn test_error2_fn<T: Eq + B>(&self) {}
+    //~^ ERROR E0276
+
+    // invalid bound for T, was defined as Eq + Ord in trait
+    fn test_error3_fn<T: B + Eq>(&self) {}
+    //~^ ERROR E0276
+
+    // multiple bounds, same order as in trait
+    fn test3_fn<T: Ord + Eq>(&self) {}
+
+    // multiple bounds, different order as in trait
+    fn test4_fn<T: Eq + Ord>(&self) {}
+
+    // parameters in impls must be equal or more general than in the defining trait
+    fn test_error5_fn<T: B>(&self) {}
+    //~^ ERROR E0276
+
+    // bound `std::cmp::Eq` not enforced by this implementation, but this is OK
+    fn test6_fn<T: A>(&self) {}
+
+    fn test_error7_fn<T: A + Eq>(&self) {}
+    //~^ ERROR E0276
+
+    fn test_error8_fn<T: C>(&self) {}
+    //~^ ERROR E0276
+}
+
+trait Getter<T> {
+    fn get(&self) -> T { loop { } }
+}
+
+trait Trait {
+    fn method<G:Getter<isize>>(&self);
+}
+
+impl Trait for usize {
+    fn method<G: Getter<usize>>(&self) {}
+    //~^ ERROR E0276
+}
+
+fn main() {}