6a66b32270
Refactor compare_impl_method into its own file. Modify the code to stop comparing individual parameter bounds. Instead we now use the predicates list attached to the trait and implementation generics. This ensures consistency even when bounds are declared in different places (i.e on a parameter vs. in a where clause).
78 lines
2.4 KiB
Rust
78 lines
2.4 KiB
Rust
// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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//
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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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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 the requirement `T : core::cmp::Ord` appears on the impl
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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 the requirement `T : B` appears on the impl
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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 the requirement `T : B` appears on the impl
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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 the requirement `T : B` appears on the impl
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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 the requirement `T : core::cmp::Eq` appears on the impl
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fn test_error8_fn<T: C>(&self) {}
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//~^ ERROR the requirement `T : C` appears on the impl
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}
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trait Getter<T> { }
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trait Trait {
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fn method<G:Getter<isize>>();
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}
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impl Trait for usize {
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fn method<G: Getter<usize>>() {}
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//~^ G : Getter<usize>` appears on the impl method but not on the corresponding trait method
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}
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fn main() {}
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