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
|
extern crate onig;
use onig::*;
fn ex(hay: &str, pattern: &str, syntax: &Syntax) {
let reg = Regex::with_options(pattern, RegexOptions::REGEX_OPTION_NONE, syntax).unwrap();
println!("number of captures: {}", reg.captures_len());
println!(
"number of capture histories: {}",
reg.capture_histories_len()
);
let mut region = Region::new();
let r = reg.search_with_options(
hay,
0,
hay.len(),
SearchOptions::SEARCH_OPTION_NONE,
Some(&mut region),
);
if let Some(pos) = r {
println!("match at {}", pos);
for (i, (start, end)) in region.iter().enumerate() {
println!("{}: ({}-{})", i, start, end);
}
region.tree_traverse(|i, (start, end), level| {
println!("{}{}: ({}-{})", " ".repeat(level as usize), i, start, end);
true
});
} else {
println!("search fail");
}
}
fn main() {
let mut syn = Syntax::default().clone();
syn.enable_operators(SyntaxOperator::SYNTAX_OPERATOR_ATMARK_CAPTURE_HISTORY);
ex(
"((())())",
"\\g<p>(?@<p>\\(\\g<s>\\)){0}(?@<s>(?:\\g<p>)*|){0}",
&syn,
);
ex("x00x00x00", "(?@x(?@\\d+))+", &syn);
ex("0123", "(?@.)(?@.)(?@.)(?@.)", &syn);
}
|
