Implement cmp traits for Rc<T> and add a ptr_eq method.
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@ -22,6 +22,7 @@ use ops::Drop;
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use kinds::{Freeze, Send};
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use clone::{Clone, DeepClone};
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use cell::RefCell;
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use cmp::{Eq, TotalEq, Ord, TotalOrd, Ordering};
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struct RcBox<T> {
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value: T,
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@ -80,6 +81,60 @@ impl<T> Rc<T> {
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pub fn borrow<'r>(&'r self) -> &'r T {
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unsafe { &(*self.ptr).value }
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}
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/// Determine if two reference-counted pointers point to the same object
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#[inline]
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pub fn ptr_eq(&self, other: &Rc<T>) -> bool {
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self.ptr == other.ptr
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}
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}
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impl<T: Eq> Eq for Rc<T> {
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#[inline]
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fn eq(&self, other: &Rc<T>) -> bool {
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unsafe { (*self.ptr).value == (*other.ptr).value }
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}
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#[inline]
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fn ne(&self, other: &Rc<T>) -> bool {
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unsafe { (*self.ptr).value != (*other.ptr).value }
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}
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}
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impl<T: TotalEq> TotalEq for Rc<T> {
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#[inline]
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fn equals(&self, other: &Rc<T>) -> bool {
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unsafe { (*self.ptr).value.equals(&(*other.ptr).value) }
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}
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}
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impl<T: Ord> Ord for Rc<T> {
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#[inline]
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fn lt(&self, other: &Rc<T>) -> bool {
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unsafe { (*self.ptr).value < (*other.ptr).value }
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}
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#[inline]
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fn le(&self, other: &Rc<T>) -> bool {
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unsafe { (*self.ptr).value <= (*other.ptr).value }
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}
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#[inline]
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fn ge(&self, other: &Rc<T>) -> bool {
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unsafe { (*self.ptr).value >= (*other.ptr).value }
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}
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#[inline]
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fn gt(&self, other: &Rc<T>) -> bool {
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unsafe { (*self.ptr).value > (*other.ptr).value }
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}
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}
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impl<T: TotalOrd> TotalOrd for Rc<T> {
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#[inline]
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fn cmp(&self, other: &Rc<T>) -> Ordering {
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unsafe { (*self.ptr).value.cmp(&(*other.ptr).value) }
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}
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}
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impl<T> Clone for Rc<T> {
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