124 lines
2.7 KiB
Rust
124 lines
2.7 KiB
Rust
// 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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enum cat_type { tuxedo, tabby, tortoiseshell }
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impl cat_type : cmp::Eq {
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pure fn eq(other: &cat_type) -> bool {
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(self as uint) == ((*other) as uint)
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}
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pure fn ne(other: &cat_type) -> bool { !self.eq(other) }
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}
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// Very silly -- this just returns the value of the name field
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// for any int value that's less than the meows field
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// ok: T should be in scope when resolving the trait ref for map
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struct cat<T: Copy> {
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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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}
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impl<T: Copy> cat<T> {
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fn speak() { 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> : Map<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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fn contains_key(+k: int) -> bool { k <= self.meows }
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fn contains_key_ref(k: &int) -> bool { self.contains_key(*k) }
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fn get(+k:int) -> T { match self.find(k) {
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Some(v) => { v }
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None => { fail ~"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 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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}
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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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}
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}
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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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}
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