// 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#"(?x)(?<key>\w*) # The key.
\s*:\s* # : with optional spaces around.
(?<value> # The value.
# A string value, single or double-quoted:
(?<quote>["']) # Capture the double or single quote.
(?:\\.|.)*? # Backslash followed by anything or any char, ungreedy.
\k<quote> # The double or single quote captured before.
|
# Int and float numbers:
(?<number>[-+]?[0-9]*\.?[0-9]+([eE][-+]?[0-9]+)?)
|
# true, false and null (or other constants):
(?<constant>true | false | null)
)"#).unwrap();
let string = "# OK for very simple stuff, such as this:
{
float: 'null',
another: \"foo\",
age: 45,
type: '\"simple\" \\' quote',
comment: \"Hello,\\nA backslash \\\\, a tab \\t and a \\\"dummy\\\" word.\\nOk?\",
important: true,
weight: 69.7,
negative: -2.5
}
Not ok for complex stuff:
{
subStaff: {
help: true,
}
}";
// 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/