Struct RestartStack 

pub struct RestartStack { /* private fields */ }

A stack of Restarts, searched innermost-first by name on invocation.

Models the dynamic-extent restart chain of the condition system.

Implementations

impl RestartStack

pub fn new() -> Self

Builds an empty restart stack.

pub fn push(&mut self, restart: Restart)

Installs restart as the new innermost restart.

pub fn pop(&mut self) -> Option<Restart>

Removes and returns the innermost restart, if any.

pub fn invoke( &self, cx: &mut Cx, name: &Symbol, value: Ref, ) -> Result<ControlResultValue>

Invokes the nearest restart named name with value.

Fails with Error::Eval when no restart with that name is installed.

pub fn nearest_restart(&self, name: &Symbol) -> Result<&Restart>

Returns the innermost restart named name, or Error::Eval when none matches.

Trait Implementations

impl Clone for RestartStack

fn clone(&self) -> RestartStack

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RestartStack

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

Formats the value using the given formatter.

impl Default for RestartStack

fn default() -> RestartStack

Returns the “default value” for a type.

impl Eq for RestartStack

impl PartialEq for RestartStack

fn eq(&self, other: &RestartStack) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for RestartStack