| // Copyright 2014 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| // |
| // 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 the requirement `T: std::cmp::Ord` appears on the impl |
| |
| // invalid bound for T, was defined as Eq + Ord in trait |
| fn test_error2_fn<T: Eq + B>(&self) {} |
| //~^ ERROR the requirement `T: B` appears on the impl |
| |
| // invalid bound for T, was defined as Eq + Ord in trait |
| fn test_error3_fn<T: B + Eq>(&self) {} |
| //~^ ERROR the requirement `T: B` appears on the impl |
| |
| // 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 the requirement `T: B` appears on the impl |
| |
| // 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 the requirement `T: std::cmp::Eq` appears on the impl |
| |
| fn test_error8_fn<T: C>(&self) {} |
| //~^ ERROR the requirement `T: C` appears on the impl |
| } |
| |
| 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 `G: Getter<usize>` appears on the impl method |
| } |
| |
| fn main() {} |