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
|
use {Token, SyntaxKind, TextUnit};
use super::Event;
use syntax_kinds::{WHITESPACE, COMMENT};
pub struct Parser<'t> {
text: &'t str,
raw_tokens: &'t [Token],
non_ws_tokens: Vec<(usize, TextUnit)>,
pos: usize,
events: Vec<Event>,
}
impl<'t> Parser<'t> {
pub(crate) fn new(text: &'t str, raw_tokens: &'t [Token]) -> Parser<'t> {
let mut non_ws_tokens = Vec::new();
let mut len = TextUnit::new(0);
for (idx, &token) in raw_tokens.iter().enumerate() {
match token.kind {
WHITESPACE | COMMENT => (),
_ => non_ws_tokens.push((idx, len)),
}
len += token.len;
}
Parser {
text,
raw_tokens,
non_ws_tokens,
pos: 0,
events: Vec::new(),
}
}
pub(crate) fn into_events(self) -> Vec<Event> {
assert!(self.is_eof());
self.events
}
pub(crate) fn is_eof(&self) -> bool {
self.pos == self.non_ws_tokens.len()
}
pub(crate) fn start(&mut self, kind: SyntaxKind) {
self.event(Event::Start { kind });
}
pub(crate) fn finish(&mut self) {
self.event(Event::Finish);
}
pub(crate) fn bump(&mut self) -> Option<SyntaxKind> {
if self.is_eof() {
return None;
}
let idx = self.non_ws_tokens[self.pos].0;
self.pos += 1;
Some(self.raw_tokens[idx].kind)
}
fn event(&mut self, event: Event) {
self.events.push(event)
}
}
|
