flash_rowan 0.5.7

Biome's custom Rowan definition (forked from biome_rowan)
Documentation 
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

use crate::SyntaxKind;
use crate::green::GreenElement;
use crate::syntax_factory::raw_syntax::{RawSyntaxElement, RawSyntaxElementRef};
use std::iter::FusedIterator;
use std::marker::PhantomData;

/// The parsed children of a node, not accounting for any missing children (required or optional)
#[derive(Debug)]
pub struct ParsedChildren<'a, K> {
    /// Reference to an array containing all children of this node or any of its parents
    all_children: &'a mut Vec<(u64, GreenElement)>,

    /// The index of the first child of this node in the `all_children` array
    first_child: usize,
    ph: PhantomData<K>,
}

impl<'a, K: SyntaxKind> ParsedChildren<'a, K> {
    pub(crate) fn new(all_children: &'a mut Vec<(u64, GreenElement)>, first_child: usize) -> Self {
        Self {
            all_children,
            first_child,
            ph: PhantomData,
        }
    }

    pub fn len(&self) -> usize {
        (self.first_child..self.all_children.len()).len()
    }

    pub fn is_empty(&self) -> bool {
        self.len() == 0
    }
}

impl<'a, K: SyntaxKind> IntoIterator for ParsedChildren<'a, K> {
    type Item = RawSyntaxElement<K>;
    type IntoIter = ParsedChildrenIntoIterator<'a, K>;

    fn into_iter(self) -> Self::IntoIter {
        ParsedChildrenIntoIterator {
            inner: self.all_children.drain(self.first_child..),
            ph: PhantomData,
        }
    }
}

#[derive(Debug)]
pub struct ParsedChildrenIntoIterator<'a, K> {
    inner: std::vec::Drain<'a, (u64, GreenElement)>,
    ph: PhantomData<K>,
}

impl<K: SyntaxKind> Iterator for ParsedChildrenIntoIterator<'_, K> {
    type Item = RawSyntaxElement<K>;

    fn next(&mut self) -> Option<Self::Item> {
        self.inner
            .next()
            .map(|(_, raw)| RawSyntaxElement::from(raw))
    }

    fn size_hint(&self) -> (usize, Option<usize>) {
        let len = self.len();
        (len, Some(len))
    }
}

impl<K: SyntaxKind> FusedIterator for ParsedChildrenIntoIterator<'_, K> {}

impl<K: SyntaxKind> ExactSizeIterator for ParsedChildrenIntoIterator<'_, K> {
    fn len(&self) -> usize {
        self.inner.len()
    }
}

impl<K: SyntaxKind> DoubleEndedIterator for ParsedChildrenIntoIterator<'_, K> {
    fn next_back(&mut self) -> Option<Self::Item> {
        self.inner
            .next_back()
            .map(|(_, raw)| RawSyntaxElement::from(raw))
    }
}

impl<'a, K: SyntaxKind> IntoIterator for &'a ParsedChildren<'a, K> {
    type Item = RawSyntaxElementRef<'a, K>;
    type IntoIter = ParsedChildrenIterator<'a, K>;

    fn into_iter(self) -> Self::IntoIter {
        ParsedChildrenIterator {
            inner: self.all_children[self.first_child..].iter(),
            ph: PhantomData,
        }
    }
}

#[derive(Debug)]
pub struct ParsedChildrenIterator<'a, K> {
    inner: std::slice::Iter<'a, (u64, GreenElement)>,
    ph: PhantomData<K>,
}

impl<'a, K: SyntaxKind> Iterator for ParsedChildrenIterator<'a, K> {
    type Item = RawSyntaxElementRef<'a, K>;

    fn next(&mut self) -> Option<Self::Item> {
        self.inner
            .next()
            .map(|(_, raw)| RawSyntaxElementRef::from(raw))
    }

    fn size_hint(&self) -> (usize, Option<usize>) {
        let len = self.len();
        (len, Some(len))
    }
}

impl<K: SyntaxKind> FusedIterator for ParsedChildrenIterator<'_, K> {}

impl<K: SyntaxKind> ExactSizeIterator for ParsedChildrenIterator<'_, K> {
    fn len(&self) -> usize {
        self.inner.len()
    }
}

impl<K: SyntaxKind> DoubleEndedIterator for ParsedChildrenIterator<'_, K> {
    fn next_back(&mut self) -> Option<Self::Item> {
        self.inner
            .next_back()
            .map(|(_, raw)| RawSyntaxElementRef::from(raw))
    }
}