54 lines
1.8 KiB
Rust
54 lines
1.8 KiB
Rust
// 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 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`.
|
|
|
|
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) //~ ERROR `CompareToInts: CompareTo<i32>` is not satisfied
|
|
}
|
|
|
|
fn with_trait<C:CompareToInts>(c: &C) -> bool {
|
|
c.same_as(22) //~ ERROR `C: CompareTo<i32>` is not satisfied
|
|
}
|
|
|
|
fn with_ufcs1<C:CompareToInts>(c: &C) -> bool {
|
|
CompareToInts::same_as(c, 22) //~ ERROR `CompareToInts: CompareTo<i32>` is not satisfied
|
|
}
|
|
|
|
fn with_ufcs2<C:CompareToInts>(c: &C) -> bool {
|
|
CompareTo::same_as(c, 22) //~ ERROR `C: CompareTo<i32>` is not satisfied
|
|
}
|
|
|
|
fn main() {
|
|
assert_eq!(22_i64.same_as(22), true); //~ ERROR `i64: CompareTo<i32>` is not satisfied
|
|
}
|