blob: a6056159b266784113bf945c4a54073321bf259c (
plain)
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
|
use super::parser::Parser;
use super::StringComponent;
pub fn parse_byte_string_literal(src: &str) -> ByteStringComponentIterator {
ByteStringComponentIterator {
parser: Parser::new(src),
has_closing_quote: false,
}
}
pub struct ByteStringComponentIterator<'a> {
parser: Parser<'a>,
pub has_closing_quote: bool,
}
impl<'a> Iterator for ByteStringComponentIterator<'a> {
type Item = StringComponent;
fn next(&mut self) -> Option<StringComponent> {
if self.parser.pos == 0 {
assert!(
self.parser.advance() == 'b',
"byte string literal should start with a `b`"
);
assert!(
self.parser.advance() == '"',
"byte string literal should start with a `b`, followed by double quotes"
);
}
if let Some(component) = self.parser.parse_string_component() {
return Some(component);
}
// We get here when there are no char components left to parse
if self.parser.peek() == Some('"') {
self.parser.advance();
self.has_closing_quote = true;
}
assert!(
self.parser.peek() == None,
"byte string literal should leave no unparsed input: src = {:?}, pos = {}, length = {}",
self.parser.src,
self.parser.pos,
self.parser.src.len()
);
None
}
}
|
