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
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
use crate::{
ParseIterator,
position::Position,
pit::PointInTime
};
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub struct Recorder {
pos: Position
}
impl Recorder {
pub(super) fn new(pos: Position) -> Self {
Self {pos}
}
pub fn pos(&self) -> Position {
self.pos
}
}
#[derive(Debug)]
pub struct RecordIter<'a, T> {
inner: &'a mut T,
recorder: Recorder
}
impl<'s, 'a, T> RecordIter<'a, T>
where T: ParseIterator<'s> {
pub(super) fn new(inner: &'a mut T) -> Self {
let pos = inner.pit().record_pos();
Self {
inner,
recorder: Recorder::new(pos)
}
}
}
impl<'s, 'a, T> ParseIterator<'s> for RecordIter<'a, T>
where T: ParseIterator<'s> {
type PointInTime = T::PointInTime;
fn slice(&self) -> &'s [u8] {
self.inner.slice()
}
fn pit(&self) -> Self::PointInTime {
self.inner.pit()
}
fn restore_pit(&mut self, pit: Self::PointInTime) {
self.inner.restore_pit(pit)
}
fn advance(&mut self) -> Option<()> {
self.inner.advance()
}
fn recorder(&self) -> Option<&Recorder> {
Some(&self.recorder)
}
#[inline]
unsafe fn is_valid_utf8() -> bool {
T::is_valid_utf8()
}
}
#[cfg(test)]
mod tests {
use crate::*;
#[test]
fn record() {
let s = b"my byte str";
let mut parser = Parser::new( s );
parser.consume_while_byte_fn( |&b| b != b' ' )
.next().unwrap();
unsafe {
let st = parser.record()
.consume_to_str_unchecked();
assert_eq!( "byte str", st );
}
}
#[test]
fn record_combi() {
let s = b"my byte str";
let mut parser = Parser::new( s );
let mut parser = parser.split_on_byte( b' ' );
unsafe {
let st = parser.next().unwrap()
.record()
.consume_to_str_unchecked();
assert_eq!( "my", st );
let st = parser.next().unwrap()
.record()
.consume_to_str_unchecked();
assert_eq!( "byte", st );
}
}
#[test]
fn nested_record() {
let s = b"aaaabbb";
let mut parser = Parser::new( s );
let mut first_recorder = parser.record();
unsafe {
let res = first_recorder
.while_byte_fn( |&b| b == b'a' )
.record()
.consume_to_str_unchecked();
assert_eq!( "aaaa", res );
}
unsafe {
assert_eq!( "aaaabbb", first_recorder.consume_to_str_unchecked() );
}
}
#[test]
fn check_that_it_is_inplace() {
let mut parser = Parser::new( b"aaaabbb" );
unsafe {
let res = parser
.record()
.consume_while_byte_fn( |&b| b == b'a' )
.to_str_unchecked();
assert_eq!( "aaaa", res );
}
}
}