Struct StateStack 

pub struct StateStack<ET: EngineTypes> {
    pub stack: Vec<StackLevel<ET>>,
    /* private fields */
}

A stack of StateChanges, to be rolled back when a group ends

Fields

stack: Vec<StackLevel<ET>>

The stack of StackLevels

Implementations

impl<ET: EngineTypes> StateStack<ET>

pub fn push(&mut self, group_type: GroupType)

Push a new stack level onto the stack with the given GroupType, as a new group begins

pub fn pop(&mut self) -> (GroupType, Vec<ET::Token>, ChangeIter<'_, ET>)

Pop a stack level from the stack, as a group ends. Returns the GroupType, the \aftergroup Tokens, and an iterator over the StateChanges to be rolled back.

pub fn add_change_globally(&mut self, change: StateChange<ET>)

Register a global state change, never to be rolled back; if there is a stack level, remove any equivalent previous changes

pub fn add_change_locally(&mut self, change: StateChange<ET>)

Register a local state change, to be rolled back when the current group ends

Trait Implementations

impl<ET: EngineTypes> Clone for StateStack<ET>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<ET: EngineTypes> Default for StateStack<ET>

fn default() -> Self

Returns the “default value” for a type.