pub fn new() -> Self {
        Self {
            lexer: lexer(),
            parser: parser(),
        }
    }
/// Construct a new grammar for the Percival language.
Construct a new grammar for the Percival language.
Construct a new grammar for the Percival language .
pub fn new() -> Self {
        Self {
            lexer: lexer(),
            parser: parser(),
        }
    }
pub fn new ( ) -> Self { Self { lexer : lexer ( ) , parser : parser ( ) , } }
Construct a new grammar for the Percival language.
Construct a new grammar for the Percival language .