32 lines
1 KiB
Rust
32 lines
1 KiB
Rust
#![warn(clippy::cmp_null)]
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#![allow(unused_mut)]
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use std::ptr;
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fn main() {
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let x = 0;
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let p: *const usize = &x;
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if p == ptr::null() {
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//~^ ERROR: comparing with null is better expressed by the `.is_null()` method
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//~| NOTE: `-D clippy::cmp-null` implied by `-D warnings`
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println!("This is surprising!");
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}
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if ptr::null() == p {
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//~^ ERROR: comparing with null is better expressed by the `.is_null()` method
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println!("This is surprising!");
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}
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let mut y = 0;
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let mut m: *mut usize = &mut y;
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if m == ptr::null_mut() {
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//~^ ERROR: comparing with null is better expressed by the `.is_null()` method
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println!("This is surprising, too!");
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}
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if ptr::null_mut() == m {
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//~^ ERROR: comparing with null is better expressed by the `.is_null()` method
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println!("This is surprising, too!");
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}
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let _ = x as *const () == ptr::null();
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//~^ ERROR: comparing with null is better expressed by the `.is_null()` method
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}
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