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// check-pass
#![feature(ptr_from_ref)]
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 {}
}
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