Struct CtxStack 

pub struct CtxStack { /* private fields */ }

Nunjucks-style frame stack: inner frames shadow outer; set updates the innermost existing binding.

Values are stored as Arc so repeated reads and shallow copies of bindings can share the same Value allocation when the stack is cloned or merged (see Self::flatten).

Frame maps use [ahash::AHashMap] for faster string-key lookup on hot paths (many distinct variables).

Implementations

impl CtxStack

pub fn from_root(root: Map<String, Value>) -> Self

pub fn revision(&self) -> u64

Monotonic counter; changes whenever template bindings or frames change.

pub fn push_frame(&mut self)

pub fn pop_frame(&mut self)

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

Borrows the innermost binding for name across frames (template context shadows outer).

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

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

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

pub fn set_local(&mut self, name: &str, value: Value)

Assign in the innermost frame only (for for / loop.* bindings so inner loops can shadow).

pub fn flatten(&self) -> Map<String, Value>

Outer frames first, then inner overwrites — snapshot for macro bodies.

Trait Implementations

impl Clone for CtxStack

fn clone(&self) -> CtxStack

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CtxStack

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

Formats the value using the given formatter.