// // 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() {}