Struct Env 

pub struct Env { /* private fields */ }

Implementations

impl Env

pub fn new() -> Self

pub fn lookup(&self, name: &str) -> Option<Value>

pub fn extend(&self, name: impl Into<String>, value: Value) -> Self

Add one binding on top. Returns a new Env (immutable API).

pub fn extend_many<I, K, V>(&self, it: I) -> Self

where I: IntoIterator<Item = (K, V)>, K: Into<String>, V: Into<Value>,

Add many bindings on top in one frame.

Trait Implementations

impl Clone for Env

fn clone(&self) -> Env

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Default for Env

fn default() -> Env

Returns the “default value” for a type.