// include the latest version of the regex crate in your Cargo.toml
extern crate regex;
use regex::Regex;
fn main() {
let regex = Regex::new(r"\{(?:(?:\{(?:(?:\{(?:[^{}])*\})|(?:[^{}]))*\})|(?:[^{}]))*\}").unwrap();
let string = "captures up to singly-nested blocks:
p{1} = \\{(?:[^{}])*\\}
int main() {
return 0;
}
captures up to doubly-nested:
p{2} = \\{(?:(?:p{1})|(?:[^{}]))*\\}
...or...
p{2} = \\{(?:(?:\\{(?:[^{}])*\\})|(?:[^{}]))*\\}
void more_complex_fxn(int z) {
int x = z / 9;
if (x > 3) {
do_something;
x += 5;
}
}
Following the pattern set above...
up to triply-nested:
p{3} = \\{(?:(?:p{2})|(?:[^{}]))*\\}
...or...
p{3} = \\{(?:(?:\\{(?:(?:\\{(?:[^{}])*\\})|(?:[^{}]))*\\})|(?:[^{}]))*\\}
double so_many_blocks(double x) {
double y = x;
while(y > 4) {
if (y < 6) {
y -= 0.3;
} else {
y -= 0.5;
}
}
return y;
}";
// result will be an iterator over tuples containing the start and end indices for each match in the string
let result = regex.captures_iter(string);
for mat in result {
println!("{:?}", mat);
}
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Rust, please visit: https://docs.rs/regex/latest/regex/