Struct pupil::env::Env

pub struct Env { /* fields omitted */ }

The environment.

Stores the builtins available to expressions and the last answer.

Methods

impl Env

fn new() -> Env

Create a new environment.

fn init(&mut self)

fn find(&self, id: &str) -> Option<BuiltinFn>

Find a builtin.

fn var(&self, id: &str) -> Option<Value>

Find a variable.

fn set_var<I: Into<Cow<'static, str>>>(&mut self, id: I, val: Value)

Set a variable.

Trait Implementations

impl Default for Env

fn default() -> Env

Returns the "default value" for a type.