| // 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. |
| |
| // run-pass |
| // Test where the impl self type uses a projection from a constant type. |
| |
| |
| trait Int |
| { |
| type T; |
| |
| fn dummy(&self) { } |
| } |
| |
| trait NonZero |
| { |
| fn non_zero(self) -> bool; |
| } |
| |
| impl Int for i32 { type T = i32; } |
| impl Int for i64 { type T = i64; } |
| impl Int for u32 { type T = u32; } |
| impl Int for u64 { type T = u64; } |
| |
| impl NonZero for <i32 as Int>::T { fn non_zero(self) -> bool { self != 0 } } |
| impl NonZero for <i64 as Int>::T { fn non_zero(self) -> bool { self != 0 } } |
| impl NonZero for <u32 as Int>::T { fn non_zero(self) -> bool { self != 0 } } |
| impl NonZero for <u64 as Int>::T { fn non_zero(self) -> bool { self != 0 } } |
| |
| fn main () |
| { |
| assert!(NonZero::non_zero(22_i32)); |
| assert!(NonZero::non_zero(22_i64)); |
| assert!(NonZero::non_zero(22_u32)); |
| assert!(NonZero::non_zero(22_u64)); |
| |
| assert!(!NonZero::non_zero(0_i32)); |
| assert!(!NonZero::non_zero(0_i64)); |
| assert!(!NonZero::non_zero(0_u32)); |
| assert!(!NonZero::non_zero(0_u64)); |
| } |