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77 lines
2.9 KiB
Rust
77 lines
2.9 KiB
Rust
// check-pass
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#![feature(ptr_from_ref)]
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use std::ptr;
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extern "C" fn c_fn() {}
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fn static_i32() -> &'static i32 { &1 }
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fn main() {
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let fn_ptr = main;
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// ------------- Function pointers ---------------
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if (fn_ptr as *mut ()).is_null() {}
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//~^ WARN function pointers are not nullable
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if (fn_ptr as *const u8).is_null() {}
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//~^ WARN function pointers are not nullable
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if (fn_ptr as *const ()) == std::ptr::null() {}
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//~^ WARN function pointers are not nullable
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if (fn_ptr as *mut ()) == std::ptr::null_mut() {}
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//~^ WARN function pointers are not nullable
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if (fn_ptr as *const ()) == (0 as *const ()) {}
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//~^ WARN function pointers are not nullable
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if <*const _>::is_null(fn_ptr as *const ()) {}
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//~^ WARN function pointers are not nullable
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if (fn_ptr as *mut fn() as *const fn() as *const ()).is_null() {}
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//~^ WARN function pointers are not nullable
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if (fn_ptr as *mut fn() as *const fn()).cast_mut().is_null() {}
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//~^ WARN function pointers are not nullable
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if ((fn_ptr as *mut fn()).cast() as *const fn()).cast_mut().is_null() {}
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//~^ WARN function pointers are not nullable
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if (fn_ptr as fn() as *const ()).is_null() {}
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//~^ WARN function pointers are not nullable
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if (c_fn as *const fn()).is_null() {}
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//~^ WARN function pointers are not nullable
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// ---------------- References ------------------
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if (&mut 8 as *mut i32).is_null() {}
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//~^ WARN references are not nullable
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if ptr::from_mut(&mut 8).is_null() {}
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//~^ WARN references are not nullable
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if (&8 as *const i32).is_null() {}
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//~^ WARN references are not nullable
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if ptr::from_ref(&8).is_null() {}
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//~^ WARN references are not nullable
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if ptr::from_ref(&8).cast_mut().is_null() {}
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//~^ WARN references are not nullable
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if (ptr::from_ref(&8).cast_mut() as *mut i32).is_null() {}
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//~^ WARN references are not nullable
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if (&8 as *const i32) == std::ptr::null() {}
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//~^ WARN references are not nullable
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let ref_num = &8;
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if (ref_num as *const i32) == std::ptr::null() {}
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//~^ WARN references are not nullable
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if (b"\0" as *const u8).is_null() {}
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//~^ WARN references are not nullable
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if ("aa" as *const str).is_null() {}
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//~^ WARN references are not nullable
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if (&[1, 2] as *const i32).is_null() {}
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//~^ WARN references are not nullable
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if (&mut [1, 2] as *mut i32) == std::ptr::null_mut() {}
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//~^ WARN references are not nullable
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if (static_i32() as *const i32).is_null() {}
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//~^ WARN references are not nullable
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if (&*{ static_i32() } as *const i32).is_null() {}
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//~^ WARN references are not nullable
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// ----------------------------------------------
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const ZPTR: *const () = 0 as *const _;
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const NOT_ZPTR: *const () = 1 as *const _;
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// unlike the uplifted clippy::fn_null_check lint we do
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// not lint on them
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if (fn_ptr as *const ()) == ZPTR {}
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if (fn_ptr as *const ()) == NOT_ZPTR {}
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}
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