1 // Copyright 2012 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
17 // Note: impl on a slice
18 impl<'a> sum for &'a [int] {
19 fn sum_(self) -> int {
20 self.iter().fold(0, |a, &b| a + b)
24 fn call_sum(x: &[int]) -> int { x.sum_() }
27 let x = vec!(1, 2, 3);
28 let y = call_sum(x.as_slice());
32 let x = vec!(1, 2, 3);
33 let y = x..as_slice().sum_();
37 let x = vec!(1, 2, 3);
38 let y = x.as_slice().sum_();