Struct rust_lisp::model::Env

pub struct Env {
    pub parent: Option<Rc<RefCell<Env>>>,
    pub entries: HashMap<String, Value>,
}

An environment of symbol bindings. Used for the base environment, for closures, for let statements, for function arguments, etc.

Fields

parent: Option<Rc<RefCell<Env>>>

entries: HashMap<String, Value>

Implementations

impl Env

pub fn find(&self, symbol: &str) -> Option<Value>

Walks up the environment hierarchy until it finds the symbol's value or runs out of environments.

Trait Implementations

impl Debug for Env

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for Env

fn fmt(&self, formatter: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.