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Generalize the code so we can handle multiple supertraits.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,53 @@ | ||
| // 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. | ||
|
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| // Test a case of a trait which extends the same supertrait twice, but | ||
| // with difference type parameters. Test then that when we don't give | ||
| // enough information to pick between these, no selection is made. In | ||
| // this particular case, the two choices are i64/u64 -- so when we use | ||
| // an integer literal, we wind up falling this literal back to i32. | ||
| // See also `run-pass/trait-repeated-supertrait.rs`. | ||
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| trait CompareTo<T> { | ||
| fn same_as(&self, t: T) -> bool; | ||
| } | ||
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| trait CompareToInts : CompareTo<i64> + CompareTo<u64> { | ||
| } | ||
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| impl CompareTo<i64> for i64 { | ||
| fn same_as(&self, t: i64) -> bool { *self == t } | ||
| } | ||
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| impl CompareTo<u64> for i64 { | ||
| fn same_as(&self, t: u64) -> bool { *self == (t as i64) } | ||
| } | ||
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| impl CompareToInts for i64 { } | ||
|
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| fn with_obj(c: &CompareToInts) -> bool { | ||
| c.same_as(22) //~ ERROR `CompareTo<i32>` is not implemented | ||
| } | ||
|
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| fn with_trait<C:CompareToInts>(c: &C) -> bool { | ||
| c.same_as(22) //~ ERROR `CompareTo<i32>` is not implemented | ||
| } | ||
|
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| fn with_ufcs1<C:CompareToInts>(c: &C) -> bool { | ||
| CompareToInts::same_as(c, 22) //~ ERROR `CompareTo<i32>` is not implemented | ||
| } | ||
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| fn with_ufcs2<C:CompareToInts>(c: &C) -> bool { | ||
| CompareTo::same_as(c, 22) //~ ERROR `CompareTo<i32>` is not implemented | ||
| } | ||
|
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| fn main() { | ||
| assert_eq!(22_i64.same_as(22), true); //~ ERROR `CompareTo<i32>` is not implemented | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,56 @@ | ||
| // 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; | ||
| } | ||
|
|
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| trait CompareToInts : CompareTo<i64> + CompareTo<u64> { | ||
| } | ||
|
|
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| impl CompareTo<i64> for i64 { | ||
| fn same_as(&self, t: i64) -> bool { *self == t } | ||
| } | ||
|
|
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| impl CompareTo<u64> for i64 { | ||
| fn same_as(&self, t: u64) -> bool { *self == (t as i64) } | ||
| } | ||
|
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| impl CompareToInts for i64 { } | ||
|
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| fn with_obj(c: &CompareToInts) -> bool { | ||
| c.same_as(22_i64) && c.same_as(22_u64) | ||
| } | ||
|
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| fn with_trait<C:CompareToInts>(c: &C) -> bool { | ||
| c.same_as(22_i64) && c.same_as(22_u64) | ||
| } | ||
|
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| fn with_ufcs1<C:CompareToInts>(c: &C) -> bool { | ||
| CompareToInts::same_as(c, 22_i64) && CompareToInts::same_as(c, 22_u64) | ||
| } | ||
|
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| fn with_ufcs2<C:CompareToInts>(c: &C) -> bool { | ||
| CompareTo::same_as(c, 22_i64) && CompareTo::same_as(c, 22_u64) | ||
| } | ||
|
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| 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); | ||
| } |