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PathBuf: replace transmuting by accessor functions

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This commit is contained in:
Ralf Jung 2024-04-26 17:55:10 +02:00
parent 5ff8fbb2d8
commit c47978a241
5 changed files with 25 additions and 7 deletions
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8
library/std/src/path.rs
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@ -1158,12 +1158,6 @@ impl FusedIterator for Ancestors<'_> {}
/// Which method works best depends on what kind of situation you're in.
#[cfg_attr(not(test), rustc_diagnostic_item = "PathBuf")]
#[stable(feature = "rust1", since = "1.0.0")]
// `PathBuf::as_mut_vec` current implementation relies
// on `PathBuf` being layout-compatible with `Vec<u8>`.
// However, `PathBuf` layout is considered an implementation detail and must not be relied upon. We
// want `repr(transparent)` but we don't want it to show up in rustdoc, so we hide it under
// `cfg(doc)`. This is an ad-hoc implementation of attribute privacy.
#[cfg_attr(not(doc), repr(transparent))]
pub struct PathBuf {
inner: OsString,
}
@ -1171,7 +1165,7 @@ pub struct PathBuf {
impl PathBuf {
#[inline]
fn as_mut_vec(&mut self) -> &mut Vec<u8> {
unsafe { &mut *(self as *mut PathBuf as *mut Vec<u8>) }
self.inner.as_mut_vec_for_path_buf()
}
/// Allocates an empty `PathBuf`.