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|
#![warn(clippy::transmute_ptr_to_ref)]
#![allow(
clippy::match_single_binding,
clippy::unnecessary_cast,
clippy::missing_transmute_annotations
)]
fn ptr_to_ref<T, U>(p: *const T, m: *mut T, o: *const U, om: *mut U) {
unsafe {
let _: &T = std::mem::transmute(p);
//~^ transmute_ptr_to_ref
let _: &T = &*p;
let _: &mut T = std::mem::transmute(m);
//~^ transmute_ptr_to_ref
let _: &mut T = &mut *m;
let _: &T = std::mem::transmute(m);
//~^ transmute_ptr_to_ref
let _: &T = &*m;
let _: &mut T = std::mem::transmute(p as *mut T);
//~^ transmute_ptr_to_ref
let _ = &mut *(p as *mut T);
let _: &T = std::mem::transmute(o);
//~^ transmute_ptr_to_ref
let _: &T = &*(o as *const T);
let _: &mut T = std::mem::transmute(om);
//~^ transmute_ptr_to_ref
let _: &mut T = &mut *(om as *mut T);
let _: &T = std::mem::transmute(om);
//~^ transmute_ptr_to_ref
let _: &T = &*(om as *const T);
}
}
fn issue1231() {
struct Foo<'a, T> {
bar: &'a T,
}
let raw = 42 as *const i32;
let _: &Foo<u8> = unsafe { std::mem::transmute::<_, &Foo<_>>(raw) };
//~^ transmute_ptr_to_ref
let _: &Foo<&u8> = unsafe { std::mem::transmute::<_, &Foo<&_>>(raw) };
//~^ transmute_ptr_to_ref
type Bar<'a> = &'a u8;
let raw = 42 as *const i32;
unsafe { std::mem::transmute::<_, Bar>(raw) };
//~^ transmute_ptr_to_ref
}
fn issue8924<'a, 'b, 'c>(x: *const &'a u32, y: *const &'b u32) -> &'c &'b u32 {
unsafe {
match 0 {
0 => std::mem::transmute(x),
//~^ transmute_ptr_to_ref
1 => std::mem::transmute(y),
//~^ transmute_ptr_to_ref
2 => std::mem::transmute::<_, &&'b u32>(x),
//~^ transmute_ptr_to_ref
_ => std::mem::transmute::<_, &&'b u32>(y),
//~^ transmute_ptr_to_ref
}
}
}
#[clippy::msrv = "1.38"]
fn meets_msrv<'a, 'b, 'c>(x: *const &'a u32) -> &'c &'b u32 {
unsafe {
let a = 0u32;
let a = &a as *const u32;
let _: &u32 = std::mem::transmute(a);
//~^ transmute_ptr_to_ref
let _: &u32 = std::mem::transmute::<_, &u32>(a);
//~^ transmute_ptr_to_ref
match 0 {
0 => std::mem::transmute(x),
//~^ transmute_ptr_to_ref
_ => std::mem::transmute::<_, &&'b u32>(x),
//~^ transmute_ptr_to_ref
}
}
}
#[clippy::msrv = "1.37"]
fn under_msrv<'a, 'b, 'c>(x: *const &'a u32) -> &'c &'b u32 {
unsafe {
let a = 0u32;
let a = &a as *const u32;
let _: &u32 = std::mem::transmute(a);
//~^ transmute_ptr_to_ref
let _: &u32 = std::mem::transmute::<_, &u32>(a);
//~^ transmute_ptr_to_ref
match 0 {
0 => std::mem::transmute(x),
//~^ transmute_ptr_to_ref
_ => std::mem::transmute::<_, &&'b u32>(x),
//~^ transmute_ptr_to_ref
}
}
}
// handle DSTs
fn issue13357(ptr: *const [i32], s_ptr: *const &str, a_s_ptr: *const [&str]) {
unsafe {
// different types, without erased regions
let _ = core::mem::transmute::<_, &[u32]>(ptr);
//~^ transmute_ptr_to_ref
let _: &[u32] = core::mem::transmute(ptr);
//~^ transmute_ptr_to_ref
// different types, with erased regions
let _ = core::mem::transmute::<_, &[&[u8]]>(a_s_ptr);
//~^ transmute_ptr_to_ref
let _: &[&[u8]] = core::mem::transmute(a_s_ptr);
//~^ transmute_ptr_to_ref
// same type, without erased regions
let _ = core::mem::transmute::<_, &[i32]>(ptr);
//~^ transmute_ptr_to_ref
let _: &[i32] = core::mem::transmute(ptr);
//~^ transmute_ptr_to_ref
// same type, with erased regions
let _ = core::mem::transmute::<_, &[&str]>(a_s_ptr);
//~^ transmute_ptr_to_ref
let _: &[&str] = core::mem::transmute(a_s_ptr);
//~^ transmute_ptr_to_ref
}
}
fn main() {}
|
