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Tweak docs, especially around safety
author
Chris Morgan
<me@chrismorgan.info>
Tue, 25 Jan 2022 03:27:26 +0000
committer
Chris Morgan
<me@chrismorgan.info>
Tue, 25 Jan 2022 13:16:15 +0000
No semantic changes.
src/raw.rs
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diff --git
a/src/raw.rs
b/src/raw.rs
index 0094b3412726fc99517f70868677e39b59f3d5cc..73c20e21119906cb9578f3c5d798152eb9cd4a47 100644
(file)
--- a/
src/raw.rs
+++ b/
src/raw.rs
@@
-40,6
+40,7
@@
fn type_id_hasher() {
fn verify_hashing_with(type_id: TypeId) {
let mut hasher = TypeIdHasher::default();
type_id.hash(&mut hasher);
fn verify_hashing_with(type_id: TypeId) {
let mut hasher = TypeIdHasher::default();
type_id.hash(&mut hasher);
+ // SAFETY: u64 is valid for all bit patterns.
assert_eq!(hasher.finish(), unsafe { mem::transmute::<TypeId, u64>(type_id) });
}
// Pick a variety of types, just to demonstrate it’s all sane. Normal, zero-sized, unsized, &c.
assert_eq!(hasher.finish(), unsafe { mem::transmute::<TypeId, u64>(type_id) });
}
// Pick a variety of types, just to demonstrate it’s all sane. Normal, zero-sized, unsized, &c.
@@
-208,10
+209,11
@@
impl<A: ?Sized + UncheckedAnyExt> RawMap<A> {
}
/// Inserts a key-value pair from the map. If the key already had a value present in the map,
}
/// Inserts a key-value pair from the map. If the key already had a value present in the map,
- /// that value is returned. Otherwise,
None
is returned.
+ /// that value is returned. Otherwise,
`None`
is returned.
///
///
- /// It is the caller’s responsibility to ensure that the key corresponds with the type ID of
- /// the value. If they do not, memory safety may be violated.
+ /// # Safety
+ ///
+ /// `key` and the type ID of `value` must match, or *undefined behaviour* occurs.
#[inline]
pub unsafe fn insert(&mut self, key: TypeId, value: Box<A>) -> Option<Box<A>> {
self.inner.insert(key, value)
#[inline]
pub unsafe fn insert(&mut self, key: TypeId, value: Box<A>) -> Option<Box<A>> {
self.inner.insert(key, value)
@@
-280,8
+282,9
@@
impl<'a, A: ?Sized + UncheckedAnyExt> Entry<'a, A> {
/// Ensures a value is in the entry by inserting the default if empty, and returns
/// a mutable reference to the value in the entry.
///
/// Ensures a value is in the entry by inserting the default if empty, and returns
/// a mutable reference to the value in the entry.
///
- /// It is the caller’s responsibility to ensure that the key of the entry corresponds with
- /// the type ID of `value`. If they do not, memory safety may be violated.
+ /// # Safety
+ ///
+ /// The type ID of `default` must match the entry’s key, or *undefined behaviour* occurs.
#[inline]
pub unsafe fn or_insert(self, default: Box<A>) -> &'a mut A {
match self {
#[inline]
pub unsafe fn or_insert(self, default: Box<A>) -> &'a mut A {
match self {
@@
-293,8
+296,10
@@
impl<'a, A: ?Sized + UncheckedAnyExt> Entry<'a, A> {
/// Ensures a value is in the entry by inserting the result of the default function if empty,
/// and returns a mutable reference to the value in the entry.
///
/// Ensures a value is in the entry by inserting the result of the default function if empty,
/// and returns a mutable reference to the value in the entry.
///
- /// It is the caller’s responsibility to ensure that the key of the entry corresponds with
- /// the type ID of `value`. If they do not, memory safety may be violated.
+ /// # Safety
+ ///
+ /// The type ID of the value returned by `default` must match the entry’s key,
+ /// or *undefined behaviour* occurs.
#[inline]
pub unsafe fn or_insert_with<F: FnOnce() -> Box<A>>(self, default: F) -> &'a mut A {
match self {
#[inline]
pub unsafe fn or_insert_with<F: FnOnce() -> Box<A>>(self, default: F) -> &'a mut A {
match self {
@@
-326,8
+331,9
@@
impl<'a, A: ?Sized + UncheckedAnyExt> OccupiedEntry<'a, A> {
/// Sets the value of the entry, and returns the entry's old value.
///
/// Sets the value of the entry, and returns the entry's old value.
///
- /// It is the caller’s responsibility to ensure that the key of the entry corresponds with
- /// the type ID of `value`. If they do not, memory safety may be violated.
+ /// # Safety
+ ///
+ /// The type ID of `value` must match the entry’s key, or *undefined behaviour* occurs.
#[inline]
pub unsafe fn insert(&mut self, value: Box<A>) -> Box<A> {
self.inner.insert(value)
#[inline]
pub unsafe fn insert(&mut self, value: Box<A>) -> Box<A> {
self.inner.insert(value)
@@
-342,10
+348,11
@@
impl<'a, A: ?Sized + UncheckedAnyExt> OccupiedEntry<'a, A> {
impl<'a, A: ?Sized + UncheckedAnyExt> VacantEntry<'a, A> {
/// Sets the value of the entry with the VacantEntry's key,
impl<'a, A: ?Sized + UncheckedAnyExt> VacantEntry<'a, A> {
/// Sets the value of the entry with the VacantEntry's key,
- /// and returns a mutable reference to it
+ /// and returns a mutable reference to it.
+ ///
+ /// # Safety
///
///
- /// It is the caller’s responsibility to ensure that the key of the entry corresponds with
- /// the type ID of `value`. If they do not, memory safety may be violated.
+ /// The type ID of `value` must match the entry’s key, or *undefined behaviour* occurs.
#[inline]
pub unsafe fn insert(self, value: Box<A>) -> &'a mut A {
&mut **self.inner.insert(value)
#[inline]
pub unsafe fn insert(self, value: Box<A>) -> &'a mut A {
&mut **self.inner.insert(value)