mirror of https://github.com/rust-lang/rust
72 lines
1.6 KiB
Rust
72 lines
1.6 KiB
Rust
//
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// Make sure rustc checks the type parameter bounds in implementations of traits,
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// see #2687
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use std::marker;
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trait A { }
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trait B: A {}
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trait C: A {}
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trait Foo {
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fn test_error1_fn<T: Eq>(&self);
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fn test_error2_fn<T: Eq + Ord>(&self);
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fn test_error3_fn<T: Eq + Ord>(&self);
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fn test3_fn<T: Eq + Ord>(&self);
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fn test4_fn<T: Eq + Ord>(&self);
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fn test_error5_fn<T: A>(&self);
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fn test6_fn<T: A + Eq>(&self);
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fn test_error7_fn<T: A>(&self);
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fn test_error8_fn<T: B>(&self);
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}
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impl Foo for isize {
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// invalid bound for T, was defined as Eq in trait
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fn test_error1_fn<T: Ord>(&self) {}
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//~^ ERROR E0276
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// invalid bound for T, was defined as Eq + Ord in trait
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fn test_error2_fn<T: Eq + B>(&self) {}
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//~^ ERROR E0276
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// invalid bound for T, was defined as Eq + Ord in trait
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fn test_error3_fn<T: B + Eq>(&self) {}
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//~^ ERROR E0276
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// multiple bounds, same order as in trait
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fn test3_fn<T: Ord + Eq>(&self) {}
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// multiple bounds, different order as in trait
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fn test4_fn<T: Eq + Ord>(&self) {}
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// parameters in impls must be equal or more general than in the defining trait
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fn test_error5_fn<T: B>(&self) {}
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//~^ ERROR E0276
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// bound `std::cmp::Eq` not enforced by this implementation, but this is OK
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fn test6_fn<T: A>(&self) {}
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fn test_error7_fn<T: A + Eq>(&self) {}
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//~^ ERROR E0276
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fn test_error8_fn<T: C>(&self) {}
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//~^ ERROR E0276
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}
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trait Getter<T> {
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fn get(&self) -> T { loop { } }
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}
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trait Trait {
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fn method<G:Getter<isize>>(&self);
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}
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impl Trait for usize {
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fn method<G: Getter<usize>>(&self) {}
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//~^ ERROR E0276
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}
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fn main() {}
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