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// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
// xfail-fast
#[legacy_modes];
use a::*;
trait plus {
fn plus() -> int;
}
mod a {
#[legacy_exports];
impl uint: plus { fn plus() -> int { self as int + 20 } }
}
mod b {
#[legacy_exports];
impl ~str: plus { fn plus() -> int { 200 } }
}
trait uint_utils {
fn str() -> ~str;
fn multi(f: fn(uint));
}
impl uint: uint_utils {
fn str() -> ~str { uint::str(self) }
fn multi(f: fn(uint)) {
let mut c = 0u;
while c < self { f(c); c += 1u; }
}
}
trait vec_utils<T> {
fn length_() -> uint;
fn iter_(f: fn(T));
fn map_<U: Copy>(f: fn(T) -> U) -> ~[U];
}
impl<T> ~[T]: vec_utils<T> {
fn length_() -> uint { vec::len(self) }
fn iter_(f: fn(T)) { for self.each |x| { f(*x); } }
fn map_<U: Copy>(f: fn(T) -> U) -> ~[U] {
let mut r = ~[];
for self.each |elt| { r += ~[f(*elt)]; }
r
}
}
fn main() {
assert 10u.plus() == 30;
assert (~"hi").plus() == 200;
assert (~[1]).length_().str() == ~"1";
assert (~[3, 4]).map_(|a| a + 4 )[0] == 7;
assert (~[3, 4]).map_::<uint>(|a| a as uint + 4u )[0] == 7u;
let mut x = 0u;
10u.multi(|_n| x += 2u );
assert x == 20u;
}
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