Struct CaptureSet 

pub struct CaptureSet { /* private fields */ }

A set of variable names captured by a closure.

Implementations

impl CaptureSet

pub fn new() -> Self

Create an empty capture set.

pub fn capture(&mut self, name: &str)

Insert a variable into the capture set.

pub fn bind(&mut self, name: &str)

Remove a variable (e.g., it’s now bound locally).

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

Whether a variable is captured.

pub fn len(&self) -> usize

Number of captured variables.

pub fn is_empty(&self) -> bool

Whether the set is empty.

pub fn iter(&self) -> impl Iterator<Item = &str>

Iterate over captured variable names in sorted order.

pub fn union(&mut self, other: &CaptureSet)

Union with another capture set.

pub fn difference(&mut self, other: &CaptureSet)

Difference: remove all variables in other from self.

Trait Implementations

impl Clone for CaptureSet

fn clone(&self) -> CaptureSet

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CaptureSet

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

Formats the value using the given formatter.

impl Default for CaptureSet

fn default() -> CaptureSet

Returns the “default value” for a type.

impl Display for CaptureSet

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

Formats the value using the given formatter.