1 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 // Test a case of a trait which extends the same supertrait twice, but
12 // with difference type parameters. Test then that when we don't give
13 // enough information to pick between these, no selection is made. In
14 // this particular case, the two choices are i64/u64 -- so when we use
15 // an integer literal, we wind up falling this literal back to i32.
16 // See also `run-pass/trait-repeated-supertrait.rs`.
19 fn same_as(&self, t: T) -> bool;
22 trait CompareToInts : CompareTo<i64> + CompareTo<u64> {
25 impl CompareTo<i64> for i64 {
26 fn same_as(&self, t: i64) -> bool { *self == t }
29 impl CompareTo<u64> for i64 {
30 fn same_as(&self, t: u64) -> bool { *self == (t as i64) }
33 impl CompareToInts for i64 { }
35 fn with_obj(c: &CompareToInts) -> bool {
36 c.same_as(22) //~ ERROR `CompareToInts: CompareTo<i32>` is not satisfied
39 fn with_trait<C:CompareToInts>(c: &C) -> bool {
40 c.same_as(22) //~ ERROR `C: CompareTo<i32>` is not satisfied
43 fn with_ufcs1<C:CompareToInts>(c: &C) -> bool {
44 CompareToInts::same_as(c, 22) //~ ERROR `CompareToInts: CompareTo<i32>` is not satisfied
47 fn with_ufcs2<C:CompareToInts>(c: &C) -> bool {
48 CompareTo::same_as(c, 22) //~ ERROR `C: CompareTo<i32>` is not satisfied
52 assert_eq!(22_i64.same_as(22), true); //~ ERROR `i64: CompareTo<i32>` is not satisfied