forked from rust-ndarray/ndarray
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy patharrayformat.rs
More file actions
152 lines (145 loc) · 4.61 KB
/
arrayformat.rs
File metadata and controls
152 lines (145 loc) · 4.61 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
// Copyright 2014-2016 bluss and ndarray developers.
//
// 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::fmt;
use super::{
ArrayBase,
Data,
Dimension,
};
fn format_array<A, S, D, F>(view: &ArrayBase<S, D>, f: &mut fmt::Formatter,
mut format: F)
-> fmt::Result
where F: FnMut(&A, &mut fmt::Formatter) -> fmt::Result,
D: Dimension,
S: Data<Elem=A>,
{
let ndim = view.dim.slice().len();
/* private nowadays
if ndim > 0 && f.width.is_none() {
f.width = Some(4)
}
*/
// None will be an empty iter.
let mut last_index = match view.dim.first_index() {
None => view.dim.clone(),
Some(ix) => ix,
};
for _ in 0..ndim {
try!(write!(f, "["));
}
let mut first = true;
// Simply use the indexed iterator, and take the index wraparounds
// as cues for when to add []'s and how many to add.
for (index, elt) in view.indexed_iter() {
let take_n = if ndim == 0 { 1 } else { ndim - 1 };
let mut update_index = false;
for (i, (a, b)) in index.slice()
.iter()
.take(take_n)
.zip(last_index.slice().iter())
.enumerate() {
if a != b {
// New row.
// # of ['s needed
let n = ndim - i - 1;
for _ in 0..n {
try!(write!(f, "]"));
}
try!(write!(f, ","));
if !f.alternate() {
try!(write!(f, "\n"));
}
for _ in 0..ndim - n {
try!(write!(f, " "));
}
for _ in 0..n {
try!(write!(f, "["));
}
first = true;
update_index = true;
break;
}
}
if !first {
try!(write!(f, ", "));
}
first = false;
try!(format(elt, f));
if update_index {
last_index = index;
}
}
for _ in 0..ndim {
try!(write!(f, "]"));
}
Ok(())
}
// NOTE: We can impl other fmt traits here
/// Format the array using `Display` and apply the formatting parameters used
/// to each element.
///
/// The array is shown in multiline style, unless the alternate form
/// is used, `{:#}`.
impl<'a, A: fmt::Display, S, D: Dimension> fmt::Display for ArrayBase<S, D>
where S: Data<Elem=A>,
{
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
format_array(self, f, <_>::fmt)
}
}
/// Format the array using `Debug` and apply the formatting parameters used
/// to each element.
///
/// The array is shown in multiline style, unless the alternate form
/// is used, `{:#?}`.
impl<'a, A: fmt::Debug, S, D: Dimension> fmt::Debug for ArrayBase<S, D>
where S: Data<Elem=A>,
{
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
// Add extra information for Debug
try!(format_array(self, f, <_>::fmt));
try!(write!(f, " shape={:?}, strides={:?}", self.shape(), self.strides()));
Ok(())
}
}
/// Format the array using `LowerExp` and apply the formatting parameters used
/// to each element.
///
/// The array is shown in multiline style, unless the alternate form
/// is used, `{:#e}`.
impl<'a, A: fmt::LowerExp, S, D: Dimension> fmt::LowerExp for ArrayBase<S, D>
where S: Data<Elem=A>,
{
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
format_array(self, f, <_>::fmt)
}
}
/// Format the array using `UpperExp` and apply the formatting parameters used
/// to each element.
///
/// The array is shown in multiline style, unless the alternate form
/// is used, `{:#E}`.
impl<'a, A: fmt::UpperExp, S, D: Dimension> fmt::UpperExp for ArrayBase<S, D>
where S: Data<Elem=A>,
{
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
format_array(self, f, <_>::fmt)
}
}
/// Format the array using `LowerHex` and apply the formatting parameters used
/// to each element.
///
/// The array is shown in multiline style, unless the alternate form
/// is used, `{:#x}`.
impl<'a, A: fmt::LowerHex, S, D: Dimension> fmt::LowerHex for ArrayBase<S, D>
where S: Data<Elem=A>,
{
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
format_array(self, f, <_>::fmt)
}
}