cat modernization (cleanup of a run-pass test)
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1 changed files with 97 additions and 110 deletions
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@ -9,10 +9,8 @@
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// except according to those terms.
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// xfail-fast
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#[legacy_modes];
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extern mod std;
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use std::map::*;
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use core::container::{Container, Mutable, Map};
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enum cat_type { tuxedo, tabby, tortoiseshell }
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@ -28,121 +26,110 @@ impl cat_type : cmp::Eq {
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// ok: T should be in scope when resolving the trait ref for map
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struct cat<T> {
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// Yes, you can have negative meows
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priv mut meows : int,
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// Yes, you can have negative meows
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priv mut meows : int,
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mut how_hungry : int,
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name : T,
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mut how_hungry : int,
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name : T,
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}
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impl<T: Copy> cat<T> {
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fn speak() { self.meow(); }
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impl<T> cat<T> {
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fn speak(&mut self) { self.meow(); }
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fn eat() -> bool {
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if self.how_hungry > 0 {
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error!("OM NOM NOM");
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self.how_hungry -= 2;
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return true;
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}
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else {
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error!("Not hungry!");
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return false;
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}
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}
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}
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impl<T: Copy> cat<T> : StdMap<int, T> {
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pure fn size() -> uint { self.meows as uint }
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fn insert(+k: int, +_v: T) -> bool {
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self.meows += k;
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true
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}
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pure fn contains_key(+k: int) -> bool { k <= self.meows }
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pure fn contains_key_ref(k: &int) -> bool { self.contains_key(*k) }
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pure fn get(+k:int) -> T { match self.find(k) {
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Some(v) => { v }
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None => { die!(~"epic fail"); }
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}
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}
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pure fn find(+k:int) -> Option<T> { if k <= self.meows {
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Some(self.name)
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}
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else { None }
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}
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fn update_with_key(+key: int, +val: T, ff: fn(+k: int, +v0: T, +v1: T) -> T) -> bool {
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match self.find(key) {
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None => return self.insert(key, val),
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Some(copy orig) => return self.insert(key, ff(key, orig, val))
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}
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}
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fn update(+key: int, +val: T, ff: fn(+v0: T, +v1: T) -> T) -> bool {
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match self.find(key) {
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None => return self.insert(key, val),
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Some(copy orig) => return self.insert(key, ff(orig, val))
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}
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}
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fn remove(+k:int) -> bool {
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match self.find(k) {
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Some(x) => {
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self.meows -= k; true
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}
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None => { false }
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}
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}
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pure fn each(f: fn(+v: int, +v: T) -> bool) {
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let mut n = int::abs(self.meows);
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while n > 0 {
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if !f(n, self.name) { break; }
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n -= 1;
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}
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}
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pure fn each_key(&&f: fn(+v: int) -> bool) {
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for self.each |k, _v| { if !f(k) { break; } loop;};
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}
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pure fn each_value(&&f: fn(+v: T) -> bool) {
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for self.each |_k, v| { if !f(v) { break; } loop;};
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}
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pure fn each_ref(f: fn(k: &int, v: &T) -> bool) {}
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pure fn each_key_ref(f: fn(k: &int) -> bool) {}
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pure fn each_value_ref(f: fn(k: &T) -> bool) {}
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fn clear() { }
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}
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priv impl<T: Copy> cat<T> {
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fn meow() {
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self.meows += 1;
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error!("Meow %d", self.meows);
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if self.meows % 5 == 0 {
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self.how_hungry += 1;
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}
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fn eat(&mut self) -> bool {
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if self.how_hungry > 0 {
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error!("OM NOM NOM");
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self.how_hungry -= 2;
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return true;
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} else {
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error!("Not hungry!");
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return false;
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}
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}
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}
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fn cat<T: Copy>(in_x : int, in_y : int, in_name: T) -> cat<T> {
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cat {
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meows: in_x,
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how_hungry: in_y,
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name: in_name
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impl<T> cat<T>: Container {
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pure fn len(&self) -> uint { self.meows as uint }
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pure fn is_empty(&self) -> bool { self.meows == 0 }
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}
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impl<T> cat<T>: Mutable {
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fn clear(&mut self) {}
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}
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impl<T> cat<T>: Map<int, T> {
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pure fn contains_key(&self, k: &int) -> bool { *k <= self.meows }
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pure fn each(&self, f: fn(v: &int, v: &T) -> bool) {
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let mut n = int::abs(self.meows);
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while n > 0 {
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if !f(&n, &self.name) { break; }
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n -= 1;
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}
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}
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pure fn each_key(&self, f: fn(v: &int) -> bool) {
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for self.each |k, _| { if !f(k) { break; } loop;};
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}
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pure fn each_value(&self, f: fn(v: &T) -> bool) {
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for self.each |_, v| { if !f(v) { break; } loop;};
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}
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fn insert(&mut self, k: int, _: T) -> bool {
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self.meows += k;
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true
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}
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pure fn find(&self, k: &int) -> Option<&self/T> {
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if *k <= self.meows {
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Some(&self.name)
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} else {
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None
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}
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}
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fn remove(&mut self, k: &int) -> bool {
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match self.find(k) {
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Some(_) => {
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self.meows -= *k; true
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}
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None => { false }
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}
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}
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}
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pub fn main() {
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let nyan : cat<~str> = cat(0, 2, ~"nyan");
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for uint::range(1u, 5u) |_i| { nyan.speak(); }
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assert(nyan.find(1) == Some(~"nyan"));
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assert(nyan.find(10) == None);
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let spotty : cat<cat_type> = cat(2, 57, tuxedo);
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for uint::range(0u, 6u) |_i| { spotty.speak(); }
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assert(spotty.size() == 8u);
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assert(spotty.contains_key(2));
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assert(spotty.get(3) == tuxedo);
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impl<T> cat<T> {
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pure fn get(&self, k: &int) -> &self/T {
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match self.find(k) {
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Some(v) => { v }
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None => { die!(~"epic fail"); }
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}
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}
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static pure fn new(in_x: int, in_y: int, in_name: T) -> cat<T> {
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cat{meows: in_x, how_hungry: in_y, name: in_name }
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}
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}
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priv impl<T> cat<T> {
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fn meow(&mut self) {
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self.meows += 1;
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error!("Meow %d", self.meows);
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if self.meows % 5 == 0 {
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self.how_hungry += 1;
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}
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}
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}
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fn main() {
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let mut nyan: cat<~str> = cat::new(0, 2, ~"nyan");
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for uint::range(1, 5) |_| { nyan.speak(); }
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assert(*nyan.find(&1).unwrap() == ~"nyan");
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assert(nyan.find(&10) == None);
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let mut spotty: cat<cat_type> = cat::new(2, 57, tuxedo);
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for uint::range(0, 6) |_| { spotty.speak(); }
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assert(spotty.len() == 8);
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assert(spotty.contains_key(&2));
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assert(spotty.get(&3) == &tuxedo);
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}
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