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//
// 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() {}
|
