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

/*
SJ

Copyright (C) 2019-2022  Anonymous

There are several releases over multiple years,
they are listed as ranges, such as: "2019-2022".

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License
along with this program.  If not, see <https://www.gnu.org/licenses/>.
*/

//! # Keys in Object

mod inner;

use {
    core::ops::RangeTo,
    self::inner::Inner,
};

/// # Object Indexes
///
/// You rarely use this directly. See [shortcuts for objects][enum:Value#shortcuts-for-object] for examples.
///
/// [enum:Value#shortcuts-for-object]: enum.Value.html#shortcuts-for-object
#[derive(Debug)]
pub struct ObjectIndexes<'a> {

    inner: Inner<'a>,

}

impl ObjectIndexes<'_> {

    /// # Makes new iterator
    pub (crate) fn iter(&self) -> impl Iterator<Item=&str> {
        self.inner.iter()
    }

    /// # Length
    pub (crate) fn len(&self) -> usize {
        self.inner.len()
    }

    /// # Indexing with `RangeTo` (for logging)
    pub (crate) fn index_with_range_to(&self, range: RangeTo<usize>) -> &[&str] {
        &self.inner[range]
    }

}

impl<'a> From<&'a str> for ObjectIndexes<'a> {

    fn from(key: &'a str) -> Self {
        Self {
            inner: key.into(),
        }
    }

}

impl<'a> From<&'a [&'a str]> for ObjectIndexes<'a> {

    fn from(keys: &'a [&'a str]) -> Self {
        Self {
            inner: keys.into(),
        }
    }

}

macro_rules! impl_from_arrays_for_keys_in_object { ($($size: literal,)+) => {
    $(
        impl<'a> From<[&'a str; $size]> for ObjectIndexes<'a> {

            fn from(keys: [&'a str; $size]) -> Self {
                Self {
                    inner: keys.into(),
                }
            }

        }
    )+
}}

impl_from_arrays_for_keys_in_object!(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,);