Enum Scope

pub enum Scope {
    None,
    Local(HashMap<String, Symbol>),
    Global(HashMap<String, Symbol>),
}

Python uses LEGB scope: Local, Enclosing, Global, and Built-in. Local scope consists of local variables inside a function. Names in the local scope may change new declarations overwrite older ones. Enclosing scope is the scope of a containing function with inner/nested functions. Global is the global scope. Names within the global namespace must be unique. Built-in is basically a special scope for elements that are built into Python.

Variants

None

Local(HashMap<String, Symbol>)

Global(HashMap<String, Symbol>)

Implementations

impl Scope

pub fn new_local() -> Self

pub fn new_global() -> Self

pub fn insert(&mut self, key: String, symbol: Symbol) -> Option<Symbol>

pub fn get(&self, key: &str) -> Option<&Symbol>

pub fn contains_key(&self, key: &str) -> bool

pub fn len(&self) -> usize

pub fn is_empty(&self) -> bool

Trait Implementations

impl Clone for Scope

fn clone(&self) -> Scope

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Scope

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

Formats the value using the given formatter.

impl Default for Scope

fn default() -> Scope

Returns the “default value” for a type.