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https://github.com/rust-lang/rust-clippy
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069957a8ad
* Late Lint pass, catches: * One liner: 0 -> null -> transmute * One liner: std:null() -> transmute * Const (which resolves to null) -> transmute * UI Test case for Lint * Updated test for issue 3849, because now the lint that code generated is in Clippy. * Expanded `const.rs` miri-based Constant Folding code, to cover raw pointers
30 lines
735 B
Rust
30 lines
735 B
Rust
#![allow(dead_code)]
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#![warn(clippy::transmuting_null)]
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#![allow(clippy::zero_ptr)]
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#![allow(clippy::transmute_ptr_to_ref)]
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#![allow(clippy::eq_op)]
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// Easy to lint because these only span one line.
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fn one_liners() {
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unsafe {
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let _: &u64 = std::mem::transmute(0 as *const u64);
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let _: &u64 = std::mem::transmute(std::ptr::null::<u64>());
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}
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}
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pub const ZPTR: *const usize = 0 as *const _;
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pub const NOT_ZPTR: *const usize = 1 as *const _;
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fn transmute_const() {
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unsafe {
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// Should raise a lint.
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let _: &u64 = std::mem::transmute(ZPTR);
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// Should NOT raise a lint.
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let _: &u64 = std::mem::transmute(NOT_ZPTR);
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}
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}
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fn main() {
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one_liners();
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transmute_const();
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}
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