| //@ check-pass | |
| use std::ptr; | |
| extern "C" fn c_fn() {} | |
| fn static_i32() -> &'static i32 { &1 } | |
| fn main() { | |
| let fn_ptr = main; | |
| // ------------- Function pointers --------------- | |
| if (fn_ptr as *mut ()).is_null() {} | |
| //~^ WARN function pointers are not nullable | |
| if (fn_ptr as *const u8).is_null() {} | |
| //~^ WARN function pointers are not nullable | |
| if (fn_ptr as *const ()) == std::ptr::null() {} | |
| //~^ WARN function pointers are not nullable | |
| if (fn_ptr as *mut ()) == std::ptr::null_mut() {} | |
| //~^ WARN function pointers are not nullable | |
| if (fn_ptr as *const ()) == (0 as *const ()) {} | |
| //~^ WARN function pointers are not nullable | |
| if <*const _>::is_null(fn_ptr as *const ()) {} | |
| //~^ WARN function pointers are not nullable | |
| if (fn_ptr as *mut fn() as *const fn() as *const ()).is_null() {} | |
| //~^ WARN function pointers are not nullable | |
| if (fn_ptr as *mut fn() as *const fn()).cast_mut().is_null() {} | |
| //~^ WARN function pointers are not nullable | |
| if ((fn_ptr as *mut fn()).cast() as *const fn()).cast_mut().is_null() {} | |
| //~^ WARN function pointers are not nullable | |
| if (fn_ptr as fn() as *const ()).is_null() {} | |
| //~^ WARN function pointers are not nullable | |
| if (c_fn as *const fn()).is_null() {} | |
| //~^ WARN function pointers are not nullable | |
| // ---------------- References ------------------ | |
| if (&mut 8 as *mut i32).is_null() {} | |
| //~^ WARN references are not nullable | |
| if ptr::from_mut(&mut 8).is_null() {} | |
| //~^ WARN call is never null | |
| if (&8 as *const i32).is_null() {} | |
| //~^ WARN references are not nullable | |
| if ptr::from_ref(&8).is_null() {} | |
| //~^ WARN call is never null | |
| if ptr::from_ref(&8).cast_mut().is_null() {} | |
| //~^ WARN call is never null | |
| if (ptr::from_ref(&8).cast_mut() as *mut i32).is_null() {} | |
| //~^ WARN call is never null | |
| if (&8 as *const i32) == std::ptr::null() {} | |
| //~^ WARN references are not nullable | |
| let ref_num = &8; | |
| if (ref_num as *const i32) == std::ptr::null() {} | |
| //~^ WARN references are not nullable | |
| if (b"\0" as *const u8).is_null() {} | |
| //~^ WARN references are not nullable | |
| if ("aa" as *const str).is_null() {} | |
| //~^ WARN references are not nullable | |
| if (&[1, 2] as *const i32).is_null() {} | |
| //~^ WARN references are not nullable | |
| if (&mut [1, 2] as *mut i32) == std::ptr::null_mut() {} | |
| //~^ WARN references are not nullable | |
| if (static_i32() as *const i32).is_null() {} | |
| //~^ WARN references are not nullable | |
| if (&*{ static_i32() } as *const i32).is_null() {} | |
| //~^ WARN references are not nullable | |
| // ---------------- Functions ------------------- | |
| if ptr::NonNull::new(&mut 8).unwrap().as_ptr().is_null() {} | |
| //~^ WARN call is never null | |
| if ptr::NonNull::<u8>::dangling().as_ptr().is_null() {} | |
| //~^ WARN call is never null | |
| // ---------------------------------------------- | |
| const ZPTR: *const () = 0 as *const _; | |
| const NOT_ZPTR: *const () = 1 as *const _; | |
| // unlike the uplifted clippy::fn_null_check lint we do | |
| // not lint on them | |
| if (fn_ptr as *const ()) == ZPTR {} | |
| if (fn_ptr as *const ()) == NOT_ZPTR {} | |
| } |