Struct pax_runtime::properties::RuntimePropertiesStackFrame

pub struct RuntimePropertiesStackFrame { /* private fields */ }

Data structure for a single frame of our runtime stack, including a reference to its parent frame and properties for runtime evaluation, e.g. of Expressions. RuntimePropertiesStackFrames also track timeline playhead position.

Components push RuntimePropertiesStackFrames before computing properties and pop them after computing, thus providing a hierarchical store of node-relevant data that can be bound to symbols in expressions.

Implementations

impl RuntimePropertiesStackFrame

pub fn new( symbols_within_frame: HashMap<String, Variable>, properties: Rc<RefCell<PaxAny>>, ) -> Rc<Self>

pub fn push( self: &Rc<Self>, symbols_within_frame: HashMap<String, Variable>, properties: &Rc<RefCell<PaxAny>>, ) -> Rc<Self>

pub fn pop(self: &Rc<Self>) -> Option<Rc<Self>>

pub fn peek_nth(self: &Rc<Self>, n: isize) -> Option<Rc<RefCell<PaxAny>>>

Traverses stack recursively n times to retrieve ancestor; useful for runtime lookups for identifiers, where n is the statically known offset determined by the Pax compiler when resolving a symbol

pub fn resolve_symbol(&self, symbol: &str) -> Option<Rc<RefCell<PaxAny>>>

pub fn insert_stack_local_store<T: Store>(&self, store: T)

pub fn peek_stack_local_store<T: Store, V>( self: &Rc<Self>, f: impl FnOnce(&mut T) -> V, ) -> Result<V, String>

pub fn resolve_symbol_as_variable(&self, symbol: &str) -> Option<Variable>

pub fn resolve_symbol_as_erased_property( &self, symbol: &str, ) -> Option<UntypedProperty>

pub fn resolve_symbol_as_pax_value(&self, symbol: &str) -> Option<PaxValue>

pub fn get_properties(&self) -> Rc<RefCell<PaxAny>>

Trait Implementations

impl IdentifierResolver for RuntimePropertiesStackFrame

fn resolve(&self, name: String) -> Result<PaxValue, String>