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Auto merge of #12403 - samueltardieu:issue-12402, r=blyxyas

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Pointers cannot be converted to integers at compile time

Fix #12402

changelog: [`transmutes_expressible_as_ptr_casts`]: do not suggest invalid const casts
This commit is contained in:
bors 2024-03-03 23:09:54 +00:00
commit c2dd413c79
4 changed files with 17 additions and 1 deletions
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7
tests/ui/transmutes_expressible_as_ptr_casts.fixed
View file

@ -82,3 +82,10 @@ fn issue_10449() {
let _x: u8 = unsafe { *(f as *const u8) };
}
// Pointers cannot be cast to integers in const contexts
const fn issue_12402<P>(ptr: *const P) {
unsafe { transmute::<*const i32, usize>(&42i32) };
unsafe { transmute::<fn(*const P), usize>(issue_12402) };
let _ = unsafe { transmute::<_, usize>(ptr) };
}

7
tests/ui/transmutes_expressible_as_ptr_casts.rs
View file

@ -82,3 +82,10 @@ fn issue_10449() {
let _x: u8 = unsafe { *std::mem::transmute::<fn(), *const u8>(f) };
}
// Pointers cannot be cast to integers in const contexts
const fn issue_12402<P>(ptr: *const P) {
unsafe { transmute::<*const i32, usize>(&42i32) };
unsafe { transmute::<fn(*const P), usize>(issue_12402) };
let _ = unsafe { transmute::<_, usize>(ptr) };
}