| // Copyright 2014 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. |
| |
| // This test checks that the `_` type placeholder works |
| // correctly for enabling type inference. |
| |
| |
| struct TestStruct { |
| x: *const isize |
| } |
| |
| unsafe impl Sync for TestStruct {} |
| |
| static CONSTEXPR: TestStruct = TestStruct{ x: &413 }; |
| |
| |
| pub fn main() { |
| let x: Vec<_> = (0..5).collect(); |
| let expected: &[usize] = &[0,1,2,3,4]; |
| assert_eq!(x, expected); |
| |
| let x = (0..5).collect::<Vec<_>>(); |
| assert_eq!(x, expected); |
| |
| let y: _ = "hello"; |
| assert_eq!(y.len(), 5); |
| |
| let ptr: &usize = &5; |
| let ptr2 = ptr as *const _; |
| |
| assert_eq!(ptr as *const usize as usize, ptr2 as usize); |
| } |