use std::sync::Arc;
use swiftlet::{ParserConfig, Swiftlet};
fn main() {
let grammar = r#"
start: HELLO "(" WORLD ")"
HELLO: "hello"
WORLD: "world"
"#;
let text = "hello(world)";
let conf = Arc::new(ParserConfig::default());
let parser = Swiftlet::from_str(grammar)
.map(|grammar| grammar.parser(conf))
.expect("failed to build parser");
match parser.parse(&text) {
Ok(ast) => {
ast.print()
// Output: Tree("start", ["hello", "(", "world", ")"])
}
Err(err) => eprintln!("{}", err),
}
}