35 lines
1.3 KiB
Rust
35 lines
1.3 KiB
Rust
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// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// compile-flags: -C debug-assertions
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use std::slice;
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pub fn main() {
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// In a slice of zero-size elements the pointer is meaningless.
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// Ensure iteration still works even if the pointer is at the end of the address space.
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let slice: &[()] = unsafe { slice::from_raw_parts(-5isize as *const (), 10) };
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assert_eq!(slice.len(), 10);
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assert_eq!(slice.iter().count(), 10);
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// .nth() on the iterator should also behave correctly
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let mut it = slice.iter();
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assert!(it.nth(5).is_some());
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assert_eq!(it.count(), 4);
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let slice: &mut [()] = unsafe { slice::from_raw_parts_mut(-5isize as *mut (), 10) };
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assert_eq!(slice.len(), 10);
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assert_eq!(slice.iter_mut().count(), 10);
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let mut it = slice.iter_mut();
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assert!(it.nth(5).is_some());
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assert_eq!(it.count(), 4);
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}
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