65 lines
1.6 KiB
Rust
65 lines
1.6 KiB
Rust
// run-rustfix
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// aux-build:macro_rules.rs
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#![warn(clippy::ptr_as_ptr)]
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extern crate macro_rules;
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macro_rules! cast_it {
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($ptr: ident) => {
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$ptr.cast::<i32>()
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};
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}
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fn main() {
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let ptr: *const u32 = &42_u32;
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let mut_ptr: *mut u32 = &mut 42_u32;
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let _ = ptr.cast::<i32>();
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let _ = mut_ptr.cast::<i32>();
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// Make sure the lint can handle the difference in their operator precedences.
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unsafe {
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let ptr_ptr: *const *const u32 = &ptr;
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let _ = (*ptr_ptr).cast::<i32>();
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}
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// Changes in mutability. Do not lint this.
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let _ = ptr as *mut i32;
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let _ = mut_ptr as *const i32;
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// `pointer::cast` cannot perform unsized coercions unlike `as`. Do not lint this.
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let ptr_of_array: *const [u32; 4] = &[1, 2, 3, 4];
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let _ = ptr_of_array as *const [u32];
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let _ = ptr_of_array as *const dyn std::fmt::Debug;
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// Ensure the lint doesn't produce unnecessary turbofish for inferred types.
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let _: *const i32 = ptr.cast();
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let _: *mut i32 = mut_ptr.cast();
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// Make sure the lint is triggered inside a macro
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let _ = cast_it!(ptr);
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// Do not lint inside macros from external crates
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let _ = macro_rules::ptr_as_ptr_cast!(ptr);
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}
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#[clippy::msrv = "1.37"]
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fn _msrv_1_37() {
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let ptr: *const u32 = &42_u32;
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let mut_ptr: *mut u32 = &mut 42_u32;
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// `pointer::cast` was stabilized in 1.38. Do not lint this
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let _ = ptr as *const i32;
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let _ = mut_ptr as *mut i32;
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}
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#[clippy::msrv = "1.38"]
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fn _msrv_1_38() {
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let ptr: *const u32 = &42_u32;
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let mut_ptr: *mut u32 = &mut 42_u32;
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let _ = ptr.cast::<i32>();
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let _ = mut_ptr.cast::<i32>();
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}
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