Struct Environment 

pub struct Environment { /* private fields */ }

Scoped environment for storing variables

Implementations

impl Environment

pub fn new() -> Self

Create a new environment with a global scope

pub fn define(&mut self, name: impl Into<String>, value: Value)

Define a variable in the current scope

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

Get a variable from any scope (innermost first)

pub fn set(&mut self, name: &str, value: Value) -> bool

Set an existing variable in the nearest scope where it exists

pub fn push_scope(&mut self)

Push a new scope onto the stack

pub fn pop_scope(&mut self)

Pop the current scope from the stack

pub fn contains(&self, name: &str) -> bool

Check if a variable exists in any scope

pub fn depth(&self) -> usize

Get the current scope depth

pub fn define_enum(&mut self, def: EnumDef)

Define an enum type

pub fn get_enum(&self, name: &str) -> Option<&EnumDef>

Get an enum definition

Trait Implementations

impl Clone for Environment

fn clone(&self) -> Environment

Returns a duplicate 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() -> Self

Returns the “default value” for a type.