diff options
Diffstat (limited to 'src/test/ui/compare-method/traits-misc-mismatch-1.rs')
-rw-r--r-- | src/test/ui/compare-method/traits-misc-mismatch-1.rs | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/src/test/ui/compare-method/traits-misc-mismatch-1.rs b/src/test/ui/compare-method/traits-misc-mismatch-1.rs new file mode 100644 index 000000000..0da4aba30 --- /dev/null +++ b/src/test/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() {} |