use std::sync::Arc;
use swiftlet::grammar::Algorithm;
use swiftlet::{ParserConfig, Swiftlet};
fn main() {
let grammar = r#"
s: e
e: e "+" t | t
t: "(" e ")" | n
n: n D | D
D: "0" .. "9"
%ignore (" ", "abc")
"#;
let conf = Arc::new(ParserConfig {
algorithm: Algorithm::CLR,
start: "s".to_string(),
debug: true,
..Default::default()
});
let parser = Swiftlet::from_str(grammar)
.map(|grammar| grammar.parser(conf))
.expect("failed to build parser");
let text = "(1+(4+3)+4+5)";
if let Ok(parsed) = parser.parse(text) {
parsed.pretty_print();
}
}