Struct Placeholder

pub struct Placeholder<T> { /* private fields */ }

Placeholder for capturing. Currently supports single item (__, like ? in glob) and mult-item (___, like * in glob), with g to indicate matching trees (groups). Might be extended (like, adding fields of custom functions) to support more complex matches (ex. look ahead, balanced brackets, limited tokens, etc).

Implementations

impl<T> Placeholder<T>

pub fn new(name: String) -> Self

pub fn set_matches_item( &mut self, matches_item: impl Fn(&Item<T>) -> bool + 'static, ) -> &mut Self

pub fn set_matches_multiple(&mut self, matches_multiple: bool) -> &mut Self

pub fn name(&self) -> &str

pub fn matches_multiple(&self) -> bool

pub fn matches_item(&self, item: &Item<T>) -> bool

Test matching against a single item.

Trait Implementations

impl<T: Clone> Clone for Placeholder<T>

fn clone(&self) -> Placeholder<T>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T> Debug for Placeholder<T>

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

Formats the value using the given formatter.

impl<T> PartialEq for Placeholder<T>

fn eq(&self, other: &Self) -> 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<T> Eq for Placeholder<T>