| // Copyright 2015 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. |
| |
| // Test a case of a trait which extends the same supertrait twice, but |
| // with difference type parameters. Test that we can invoke the |
| // various methods in various ways successfully. |
| // See also `compile-fail/trait-repeated-supertrait-ambig.rs`. |
| |
| |
| trait CompareTo<T> { |
| fn same_as(&self, t: T) -> bool; |
| } |
| |
| trait CompareToInts : CompareTo<i64> + CompareTo<u64> { |
| } |
| |
| impl CompareTo<i64> for i64 { |
| fn same_as(&self, t: i64) -> bool { *self == t } |
| } |
| |
| impl CompareTo<u64> for i64 { |
| fn same_as(&self, t: u64) -> bool { *self == (t as i64) } |
| } |
| |
| impl CompareToInts for i64 { } |
| |
| fn with_obj(c: &CompareToInts) -> bool { |
| c.same_as(22_i64) && c.same_as(22_u64) |
| } |
| |
| fn with_trait<C:CompareToInts>(c: &C) -> bool { |
| c.same_as(22_i64) && c.same_as(22_u64) |
| } |
| |
| fn with_ufcs1<C:CompareToInts>(c: &C) -> bool { |
| CompareToInts::same_as(c, 22_i64) && CompareToInts::same_as(c, 22_u64) |
| } |
| |
| fn with_ufcs2<C:CompareToInts>(c: &C) -> bool { |
| CompareTo::same_as(c, 22_i64) && CompareTo::same_as(c, 22_u64) |
| } |
| |
| fn main() { |
| assert_eq!(22_i64.same_as(22_i64), true); |
| assert_eq!(22_i64.same_as(22_u64), true); |
| assert_eq!(with_trait(&22), true); |
| assert_eq!(with_obj(&22), true); |
| assert_eq!(with_ufcs1(&22), true); |
| assert_eq!(with_ufcs2(&22), true); |
| } |