mirror of https://github.com/rust-lang/rust.git
106 lines
2.4 KiB
Rust
106 lines
2.4 KiB
Rust
//@ check-pass
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//@ run-rustfix
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#![allow(dead_code)] // For the rustfix-ed code.
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use std::mem::ManuallyDrop;
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use std::ops::Deref;
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unsafe fn test_const(ptr: *const [u8]) {
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let _ = (*ptr)[..16];
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//~^ WARN implicit autoref
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}
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struct Test {
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field: [u8],
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}
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unsafe fn test_field(ptr: *const Test) -> *const [u8] {
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let l = (*ptr).field.len();
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//~^ WARN implicit autoref
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&raw const (*ptr).field[..l - 1]
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//~^ WARN implicit autoref
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}
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unsafe fn test_builtin_index(a: *mut [String]) {
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_ = (*a)[0].len();
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//~^ WARN implicit autoref
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_ = (*a)[..1][0].len();
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//~^ WARN implicit autoref
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//~^^ WARN implicit autoref
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}
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unsafe fn test_overloaded_deref_const(ptr: *const ManuallyDrop<Test>) {
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let _ = (*ptr).field;
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//~^ WARN implicit autoref
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let _ = &raw const (*ptr).field;
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//~^ WARN implicit autoref
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}
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unsafe fn test_overloaded_deref_mut(ptr: *mut ManuallyDrop<Test>) {
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let _ = (*ptr).field;
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//~^ WARN implicit autoref
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}
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unsafe fn test_double_overloaded_deref_const(ptr: *const ManuallyDrop<ManuallyDrop<Test>>) {
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let _ = (*ptr).field;
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//~^ WARN implicit autoref
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}
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unsafe fn test_manually_overloaded_deref() {
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struct W<T>(T);
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impl<T> Deref for W<T> {
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type Target = T;
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fn deref(&self) -> &T { &self.0 }
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}
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let w: W<i32> = W(5);
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let w = &raw const w;
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let _p: *const i32 = &raw const **w;
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//~^ WARN implicit autoref
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}
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struct Test2 {
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// Derefs to `[u8]`.
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field: &'static [u8]
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}
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fn test_more_manual_deref(ptr: *const Test2) -> usize {
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unsafe { (*ptr).field.len() }
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//~^ WARN implicit autoref
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}
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unsafe fn test_no_attr(ptr: *mut ManuallyDrop<u8>) {
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ptr.write(ManuallyDrop::new(1)); // Should not warn, as `ManuallyDrop::write` is not
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// annotated with `#[rustc_no_implicit_auto_ref]`
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}
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unsafe fn test_vec_get(ptr: *mut Vec<u8>) {
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let _ = (*ptr).get(0);
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//~^ WARN implicit autoref
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let _ = (*ptr).get_unchecked(0);
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//~^ WARN implicit autoref
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let _ = (*ptr).get_mut(0);
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//~^ WARN implicit autoref
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let _ = (*ptr).get_unchecked_mut(0);
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//~^ WARN implicit autoref
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}
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unsafe fn test_string(ptr: *mut String) {
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let _ = (*ptr).len();
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//~^ WARN implicit autoref
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let _ = (*ptr).is_empty();
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//~^ WARN implicit autoref
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}
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unsafe fn slice_ptr_len_because_of_msrv<T>(slice: *const [T]) {
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let _ = (*slice)[..].len();
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//~^ WARN implicit autoref
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//~^^ WARN implicit autoref
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}
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fn main() {}
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