37 lines
952 B
Rust
37 lines
952 B
Rust
//! Operations on shared box types
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// NB: transitionary, de-mode-ing.
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#[forbid(deprecated_mode)];
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#[forbid(deprecated_pattern)];
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use cmp::{Eq, Ord};
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export ptr_eq;
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pure fn ptr_eq<T>(a: @T, b: @T) -> bool {
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//! Determine if two shared boxes point to the same object
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unsafe { ptr::addr_of(*a) == ptr::addr_of(*b) }
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}
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impl<T:Eq> @const T : Eq {
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pure fn eq(&&other: @const T) -> bool { *self == *other }
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pure fn ne(&&other: @const T) -> bool { *self != *other }
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}
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impl<T:Ord> @const T : Ord {
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pure fn lt(&&other: @const T) -> bool { *self < *other }
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pure fn le(&&other: @const T) -> bool { *self <= *other }
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pure fn ge(&&other: @const T) -> bool { *self >= *other }
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pure fn gt(&&other: @const T) -> bool { *self > *other }
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}
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#[test]
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fn test() {
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let x = @3;
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let y = @3;
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assert (ptr_eq::<int>(x, x));
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assert (ptr_eq::<int>(y, y));
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assert (!ptr_eq::<int>(x, y));
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assert (!ptr_eq::<int>(y, x));
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}
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