Struct ContextStack 

pub struct ContextStack { /* private fields */ }

Manages evaluation contexts without recursion

Implementations

impl ContextStack

pub fn new() -> Self

Create a new context stack

pub fn clear(&mut self)

Clear the stack while preserving capacity

pub fn push_context( &mut self, ctx: Option<Rc<EvalContext>>, ) -> Result<usize, ExprError>

Push a context onto the stack, returning its ID

pub fn push_context_with_parent( &mut self, ctx: EvalContext, parent_id: usize, ) -> Result<usize, ExprError>

Push a new context with a specified parent

pub fn get_context(&self, id: usize) -> Option<&Rc<EvalContext>>

Get a context by ID

pub fn lookup_variable(&self, ctx_id: usize, name: &HString) -> Option<Real>

Look up a variable, checking parent contexts if needed

pub fn get_parent_id(&self, ctx_id: usize) -> Option<usize>

Get the parent ID of a context

Trait Implementations

impl Default for ContextStack

fn default() -> Self

Returns the “default value” for a type.