-// Copyright 2015 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.
-
use std::ops::Index;
-pub trait Array2D: Index<usize> {
+pub trait Array2D: Index<usize> + Sized {
fn rows(&self) -> usize;
fn columns(&self) -> usize;
fn get<'a>(&'a self, y: usize, x: usize) -> Option<&'a <Self as Index<usize>>::Output> {
return None;
}
let i = y * self.columns() + x;
- let indexer = &(*self as &Index<usize, Output = <Self as Index<usize>>::Output>);
+ let indexer = &(*self as &dyn Index<usize, Output = <Self as Index<usize>>::Output>);
//~^ERROR non-primitive cast
Some(indexer.index(i))
}