Trait HostInterface 

pub trait HostInterface {
    // Required methods
    fn initial_vars(&mut self) -> HashMap<String, Variable>;
    fn print(&mut self, string: &str, new_line: bool) -> Result<()>;
    fn read_byte(&mut self) -> Result<u8>;
    fn exit(&mut self, code: i32);
}

Host Environment Interface

Required Methods

fn initial_vars(&mut self) -> HashMap<String, Variable>

Initial variables for a stack frame

fn print(&mut self, string: &str, new_line: bool) -> Result<()>

Print a string

fn read_byte(&mut self) -> Result<u8>

Read a byte

fn exit(&mut self, code: i32)

This function should exit the program with specified code.

For cases where exit is not desired, just let the function return and interpreter will terminate with an error.

Implementors

impl HostInterface for Standard