Struct r::object::Environment

pub struct Environment {
    pub values: RefCell<HashMap<String, Obj>>,
    pub parent: Option<Rc<Environment>>,
}

Fields

values: RefCell<HashMap<String, Obj>>

parent: Option<Rc<Environment>>

Implementations

impl Environment

pub fn from_builtins() -> Rc<Environment>

pub fn len(&self) -> usize

pub fn is_empty(&self) -> bool

pub fn insert(&self, name: String, value: Obj)

pub fn append(&self, l: List)

pub fn get(&self, name: String) -> EvalResult

pub fn find(&self, name: String) -> Result<(Obj, Rc<Environment>), Signal>

Find a variable in the environment or one of its parents. If the variable is found, a mutable view on it is returned.

pub fn get_mut(&self, name: String) -> EvalResult

Trait Implementations

impl Clone for Environment

fn clone(&self) -> Environment

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Environment

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

Formats the value using the given formatter.

impl Default for Environment

fn default() -> Environment

Returns the “default value” for a type.

impl Display for Environment

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

Formats the value using the given formatter.

impl PartialEq for Environment

fn eq(&self, other: &Environment) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for Environment