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1 // Copyright 2015 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.
13 pub trait Array2D
: Index
<usize> {
14 fn rows(&self) -> usize;
15 fn columns(&self) -> usize;
16 fn get
<'a
>(&'a
self, y
: usize, x
: usize) -> Option
<&'a
<Self as Index
<usize>>::Output
> {
17 if y
>= self.rows() || x
>= self.columns() {
20 let i
= y
* self.columns() + x
;
21 let indexer
= &(*self as &Index
<usize, Output
= <Self as Index
<usize>>::Output
>);
22 //~^ERROR non-primitive cast
23 Some(indexer
.index(i
))