ndarray/impl_clone.rs
1// Copyright 2014-2016 bluss and ndarray developers.
2//
3// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
4// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
5// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
6// option. This file may not be copied, modified, or distributed
7// except according to those terms.
8
9use crate::imp_prelude::*;
10use crate::RawDataClone;
11
12impl<S: RawDataClone, D: Clone> Clone for ArrayBase<S, D>
13{
14 fn clone(&self) -> ArrayBase<S, D>
15 {
16 // safe because `clone_with_ptr` promises to provide equivalent data and ptr
17 unsafe {
18 let (data, ptr) = self.data.clone_with_ptr(self.ptr);
19 ArrayBase {
20 data,
21 ptr,
22 dim: self.dim.clone(),
23 strides: self.strides.clone(),
24 }
25 }
26 }
27
28 /// `Array` implements `.clone_from()` to reuse an array's existing
29 /// allocation. Semantically equivalent to `*self = other.clone()`, but
30 /// potentially more efficient.
31 fn clone_from(&mut self, other: &Self)
32 {
33 unsafe {
34 self.ptr = self.data.clone_from_with_ptr(&other.data, other.ptr);
35 self.dim.clone_from(&other.dim);
36 self.strides.clone_from(&other.strides);
37 }
38 }
39}
40
41impl<S: RawDataClone + Copy, D: Copy> Copy for ArrayBase<S, D> {}