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Remove unneeded T: Send + Sync bounds from Arc.

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The requirement `T: Send + Sync` only matters if the `Arc` crosses
thread boundaries, and that is adequately controlled by the impls of
`Send`/`Sync` for `Arc` itself. If `T` doesn't satisfy the bounds, then
the `Arc` cannot cross thread boundaries and so everything is still
safe (`Arc` just acts like an expensive `Rc`).
This commit is contained in:
Huon Wilson 2015-03-08 21:59:08 +11:00
parent d30609ffd7
commit 35275076f5
1 changed files with 5 additions and 5 deletions
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10
src/liballoc/arc.rs
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@ -265,7 +265,7 @@ fn deref(&self) -> &T {
}
}
impl<T: Send + Sync + Clone> Arc<T> {
impl<T: Clone> Arc<T> {
/// Make a mutable reference from the given `Arc<T>`.
///
/// This is also referred to as a copy-on-write operation because the inner data is cloned if
@ -300,7 +300,7 @@ pub fn make_unique(&mut self) -> &mut T {
#[unsafe_destructor]
#[stable(feature = "rust1", since = "1.0.0")]
impl<T: Sync + Send> Drop for Arc<T> {
impl<T> Drop for Arc<T> {
/// Drops the `Arc<T>`.
///
/// This will decrement the strong reference count. If the strong reference count becomes zero
@ -367,7 +367,7 @@ fn drop(&mut self) {
#[unstable(feature = "alloc",
reason = "Weak pointers may not belong in this module.")]
impl<T: Sync + Send> Weak<T> {
impl<T> Weak<T> {
/// Upgrades a weak reference to a strong reference.
///
/// Upgrades the `Weak<T>` reference to an `Arc<T>`, if possible.
@ -406,7 +406,7 @@ fn inner(&self) -> &ArcInner<T> {
#[unstable(feature = "alloc",
reason = "Weak pointers may not belong in this module.")]
impl<T: Sync + Send> Clone for Weak<T> {
impl<T> Clone for Weak<T> {
/// Makes a clone of the `Weak<T>`.
///
/// This increases the weak reference count.
@ -430,7 +430,7 @@ fn clone(&self) -> Weak<T> {
#[unsafe_destructor]
#[stable(feature = "rust1", since = "1.0.0")]
impl<T: Sync + Send> Drop for Weak<T> {
impl<T> Drop for Weak<T> {
/// Drops the `Weak<T>`.
///
/// This will decrement the weak reference count.