//@aux-build:proc_macros.rs #![warn(clippy::ptr_as_ptr)] #[macro_use] extern crate proc_macros; mod issue_11278_a { #[derive(Debug)] pub struct T<D: std::fmt::Debug + ?Sized> { pub p: D, } } mod issue_11278_b { pub fn f(o: &mut super::issue_11278_a::T<dyn std::fmt::Debug>) -> super::issue_11278_a::T<String> { // Retain `super` *unsafe { Box::from_raw(Box::into_raw(Box::new(o)).cast::<super::issue_11278_a::T<String>>()) } } } #[inline_macros] fn main() { let ptr: *const u32 = &42_u32; let mut_ptr: *mut u32 = &mut 42_u32; let _ = ptr.cast::<i32>(); let _ = mut_ptr.cast::<i32>(); // Make sure the lint can handle the difference in their operator precedences. unsafe { let ptr_ptr: *const *const u32 = &ptr; let _ = (*ptr_ptr).cast::<i32>(); } // Changes in mutability. Do not lint this. let _ = ptr as *mut i32; let _ = mut_ptr as *const i32; // `pointer::cast` cannot perform unsized coercions unlike `as`. Do not lint this. let ptr_of_array: *const [u32; 4] = &[1, 2, 3, 4]; let _ = ptr_of_array as *const [u32]; let _ = ptr_of_array as *const dyn std::fmt::Debug; // Ensure the lint doesn't produce unnecessary turbofish for inferred types. let _: *const i32 = ptr.cast(); let _: *mut i32 = mut_ptr.cast(); // Make sure the lint is triggered inside a macro let _ = inline!($ptr.cast::<i32>()); // Do not lint inside macros from external crates let _ = external!($ptr as *const i32); } #[clippy::msrv = "1.37"] fn _msrv_1_37() { let ptr: *const u32 = &42_u32; let mut_ptr: *mut u32 = &mut 42_u32; // `pointer::cast` was stabilized in 1.38. Do not lint this let _ = ptr as *const i32; let _ = mut_ptr as *mut i32; } #[clippy::msrv = "1.38"] fn _msrv_1_38() { let ptr: *const u32 = &42_u32; let mut_ptr: *mut u32 = &mut 42_u32; let _ = ptr.cast::<i32>(); let _ = mut_ptr.cast::<i32>(); } #[allow(clippy::unnecessary_cast)] mod null { fn use_path_mut() -> *mut u32 { use std::ptr; ptr::null_mut::<u32>() } fn full_path_mut() -> *mut u32 { std::ptr::null_mut::<u32>() } fn core_path_mut() -> *mut u32 { use core::ptr; ptr::null_mut::<u32>() } fn full_core_path_mut() -> *mut u32 { core::ptr::null_mut::<u32>() } fn use_path() -> *const u32 { use std::ptr; ptr::null::<u32>() } fn full_path() -> *const u32 { std::ptr::null::<u32>() } fn core_path() -> *const u32 { use core::ptr; ptr::null::<u32>() } fn full_core_path() -> *const u32 { core::ptr::null::<u32>() } } mod null_ptr_infer { fn use_path_mut() -> *mut u32 { use std::ptr; ptr::null_mut() } fn full_path_mut() -> *mut u32 { std::ptr::null_mut() } fn core_path_mut() -> *mut u32 { use core::ptr; ptr::null_mut() } fn full_core_path_mut() -> *mut u32 { core::ptr::null_mut() } fn use_path() -> *const u32 { use std::ptr; ptr::null() } fn full_path() -> *const u32 { std::ptr::null() } fn core_path() -> *const u32 { use core::ptr; ptr::null() } fn full_core_path() -> *const u32 { core::ptr::null() } } mod null_entire_infer { fn use_path_mut() -> *mut u32 { use std::ptr; ptr::null_mut() } fn full_path_mut() -> *mut u32 { std::ptr::null_mut() } fn core_path_mut() -> *mut u32 { use core::ptr; ptr::null_mut() } fn full_core_path_mut() -> *mut u32 { core::ptr::null_mut() } fn use_path() -> *const u32 { use std::ptr; ptr::null() } fn full_path() -> *const u32 { std::ptr::null() } fn core_path() -> *const u32 { use core::ptr; ptr::null() } fn full_core_path() -> *const u32 { core::ptr::null() } }