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deque: avoid Copy for get

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This commit is contained in:
Daniel Micay 2013-02-16 20:50:14 -05:00
parent 6190661018
commit a257329071
1 changed files with 17 additions and 17 deletions
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34
src/libstd/deque.rs
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@ -46,6 +46,11 @@ impl<T> Deque<T> {
fn peek_front(&self) -> &self/T { get(self.elts, self.lo) }
fn peek_back(&self) -> &self/T { get(self.elts, self.hi - 1u) }
fn get(&self, i: int) -> &self/T {
let idx = (self.lo + (i as uint)) % self.elts.len();
get(self.elts, idx)
}
fn pop_front(&mut self) -> T {
let mut result = self.elts[self.lo].swap_unwrap();
self.lo = (self.lo + 1u) % self.elts.len();
@ -89,11 +94,6 @@ impl<T: Copy> Deque<T> {
self.hi = (self.hi + 1u) % self.elts.len();
self.nelts += 1u;
}
fn get(&self, i: int) -> T {
let idx = (self.lo + (i as uint)) % self.elts.len();
*get(self.elts, idx)
}
}
/// Grow is only called on full elts, so nelts is also len(elts), unlike
@ -161,10 +161,10 @@ mod tests {
log(debug, d.get(1));
log(debug, d.get(2));
log(debug, d.get(3));
assert d.get(0) == 1;
assert d.get(1) == 2;
assert d.get(2) == 3;
assert d.get(3) == 4;
assert *d.get(0) == 1;
assert *d.get(1) == 2;
assert *d.get(2) == 3;
assert *d.get(3) == 4;
}
#[test]
@ -197,10 +197,10 @@ mod tests {
assert deq.len() == 3;
deq.add_front(a);
assert deq.len() == 4;
assert deq.get(0) == a;
assert deq.get(1) == b;
assert deq.get(2) == c;
assert deq.get(3) == d;
assert *deq.get(0) == a;
assert *deq.get(1) == b;
assert *deq.get(2) == c;
assert *deq.get(3) == d;
}
fn test_parameterized<T: Copy Eq Durable>(a: T, b: T, c: T, d: T) {
@ -227,10 +227,10 @@ mod tests {
assert deq.len() == 3;
deq.add_front(a);
assert deq.len() == 4;
assert deq.get(0) == a;
assert deq.get(1) == b;
assert deq.get(2) == c;
assert deq.get(3) == d;
assert *deq.get(0) == a;
assert *deq.get(1) == b;
assert *deq.get(2) == c;
assert *deq.get(3) == d;
}
#[deriving_eq]