Struct pupil::expr::Expr

pub struct Expr<'a> { /* fields omitted */ }

The expression context.

Methods

impl<'a> Expr<'a>

fn new(env: &'a Env) -> Expr<'a>

Create a new expression and bind it to an environment.

fn parse(&mut self, tok: Token) -> Result<(), Error>

Parse a token.

fn feed(&mut self, input: &str) -> Result<(), Error>

Feed new input to be parsed and evaluated.

fn result(self) -> Result<Value, Error>

Finalize the expression and calculate the final result.

fn eval(self, input: &str) -> Result<Value, Error>

Convenience method combines feed and result.