36 lines
1.2 KiB
Rust
36 lines
1.2 KiB
Rust
// Copyright 2014-2018 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution.
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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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//! Test casts for alignment issues
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#![feature(libc)]
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extern crate libc;
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#[warn(clippy::cast_ptr_alignment)]
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#[allow(clippy::no_effect, clippy::unnecessary_operation, clippy::cast_lossless)]
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fn main() {
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/* These should be warned against */
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// cast to more-strictly-aligned type
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(&1u8 as *const u8) as *const u16;
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(&mut 1u8 as *mut u8) as *mut u16;
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/* These should be okay */
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// not a pointer type
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1u8 as u16;
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// cast to less-strictly-aligned type
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(&1u16 as *const u16) as *const u8;
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(&mut 1u16 as *mut u16) as *mut u8;
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// For c_void, we should trust the user. See #2677
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(&1u32 as *const u32 as *const std::os::raw::c_void) as *const u32;
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(&1u32 as *const u32 as *const libc::c_void) as *const u32;
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}
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