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Implement Fn traits for Rc and Arc #105414

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Implement Fn traits for Rc and Arc #105414

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23 changes: 23 additions & 0 deletions library/alloc/src/rc.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -1555,6 +1555,29 @@ impl<T: ?Sized> Deref for Rc<T> {
}
}

#[stable(feature = "rc_closure_impls", since = "CURRENT_RUSTC_VERSION")]
impl<Args, F: Fn<Args> + ?Sized> Fn<Args> for Rc<F> {
extern "rust-call" fn call(&self, args: Args) -> Self::Output {
<F as Fn<Args>>::call(self, args)
}
}

#[stable(feature = "rc_closure_impls", since = "CURRENT_RUSTC_VERSION")]
impl<Args, F: Fn<Args> + ?Sized> FnMut<Args> for Rc<F> {
extern "rust-call" fn call_mut(&mut self, args: Args) -> Self::Output {
<F as Fn<Args>>::call(self, args)
}
}

#[stable(feature = "rc_closure_impls", since = "CURRENT_RUSTC_VERSION")]
impl<Args, F: Fn<Args> + ?Sized> FnOnce<Args> for Rc<F> {
type Output = F::Output;

extern "rust-call" fn call_once(self, args: Args) -> Self::Output {
<F as Fn<Args>>::call(&self, args)
}
}

#[unstable(feature = "receiver_trait", issue = "none")]
impl<T: ?Sized> Receiver for Rc<T> {}

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23 changes: 23 additions & 0 deletions library/alloc/src/sync.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -1392,6 +1392,29 @@ impl<T: ?Sized> Deref for Arc<T> {
}
}

#[stable(feature = "rc_closure_impls", since = "CURRENT_RUSTC_VERSION")]
impl<Args, F: Fn<Args> + ?Sized> Fn<Args> for Arc<F> {
extern "rust-call" fn call(&self, args: Args) -> Self::Output {
<F as Fn<Args>>::call(self, args)
}
}

#[stable(feature = "rc_closure_impls", since = "CURRENT_RUSTC_VERSION")]
impl<Args, F: Fn<Args> + ?Sized> FnMut<Args> for Arc<F> {
extern "rust-call" fn call_mut(&mut self, args: Args) -> Self::Output {
<F as Fn<Args>>::call(self, args)
}
}

#[stable(feature = "rc_closure_impls", since = "CURRENT_RUSTC_VERSION")]
impl<Args, F: Fn<Args> + ?Sized> FnOnce<Args> for Arc<F> {
type Output = F::Output;

extern "rust-call" fn call_once(self, args: Args) -> Self::Output {
<F as Fn<Args>>::call(&self, args)
}
}

#[unstable(feature = "receiver_trait", issue = "none")]
impl<T: ?Sized> Receiver for Arc<T> {}

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