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Add a Lint for Pointer to Integer Transmutes in Consts

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This commit is contained in:
Veera 2024-09-22 19:32:56 -04:00
parent c8f5136fe8
commit 98b59a1cf6
2 changed files with 12 additions and 6 deletions
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9
tests/ui/transmutes_expressible_as_ptr_casts.fixed
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@ -84,8 +84,11 @@ fn issue_10449() {
}
// Pointers cannot be cast to integers in const contexts
#[allow(ptr_to_integer_transmute_in_consts, reason = "This is tested in the compiler test suite")]
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) };
// This test exists even though the compiler lints against it
// to test that clippy's transmute lints do not trigger on this.
unsafe { std::mem::transmute::<*const i32, usize>(&42i32) };
unsafe { std::mem::transmute::<fn(*const P), usize>(issue_12402) };
let _ = unsafe { std::mem::transmute::<_, usize>(ptr) };
}

9
tests/ui/transmutes_expressible_as_ptr_casts.rs
View File

@ -84,8 +84,11 @@ fn f() {}
}
// Pointers cannot be cast to integers in const contexts
#[allow(ptr_to_integer_transmute_in_consts, reason = "This is tested in the compiler test suite")]
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) };
// This test exists even though the compiler lints against it
// to test that clippy's transmute lints do not trigger on this.
unsafe { std::mem::transmute::<*const i32, usize>(&42i32) };
unsafe { std::mem::transmute::<fn(*const P), usize>(issue_12402) };
let _ = unsafe { std::mem::transmute::<_, usize>(ptr) };
}