48 lines
925 B
Rust
48 lines
925 B
Rust
import to_str::*;
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import to_str::to_str;
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class cat implements to_str {
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priv {
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let mut meows : uint;
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fn meow() {
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#error("Meow");
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self.meows += 1u;
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if self.meows % 5u == 0u {
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self.how_hungry += 1;
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}
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}
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}
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let mut how_hungry : int;
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let name : str;
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new(in_x : uint, in_y : int, in_name: str)
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{ self.meows = in_x; self.how_hungry = in_y; self.name = in_name; }
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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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ret true;
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}
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else {
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#error("Not hungry!");
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ret false;
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}
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}
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fn to_str() -> str { self.name }
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}
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fn print_out<T: to_str>(thing: T, expected: str) {
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let actual = thing.to_str();
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#debug("%s", actual);
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assert(actual == expected);
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}
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fn main() {
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let nyan : to_str = cat(0u, 2, "nyan") as to_str;
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print_out(nyan, "nyan");
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} |