Trait ErrHandler

pub trait ErrHandler<AT: Default, ET: Default> {
    // Required method
    fn err_reporter(
        &mut self,
        parser: &mut RuntimeParser<AT, ET>,
        lookahead: &Lextoken<AT>,
        erropt: &Option<Stateaction>,
    );

    // Provided method
    fn report_err(&self, parser: &mut RuntimeParser<AT, ET>, msg: &str) { ... }
}

A trait object that implements ErrHandler is expected by the RuntimeParser::parse_base function, which implements the basic LR parsing algorithm using the generated state machine. The struct StandardReporter is provided as the default ErrHandler that uses standard I/O as interface and has the ability to train the parser. But other implementations of the trait can be created that use different interfaces, such as a graphical IDE.

Required Methods

fn err_reporter( &mut self, parser: &mut RuntimeParser<AT, ET>, lookahead: &Lextoken<AT>, erropt: &Option<Stateaction>, )

Provided Methods

fn report_err(&self, parser: &mut RuntimeParser<AT, ET>, msg: &str)

Implementors

impl<AT: Default, ET: Default> ErrHandler<AT, ET> for StandardReporter