Enum TailPattern 

pub enum TailPattern {
    Empty,
    Open,
    Capture(LocIdent),
}

The tail of a data structure pattern (record or array) which might capture the rest of said data structure.

Variants

Empty

The pattern is closed, i.e. it doesn’t allow more fields. For example, {foo, bar}.

Open

The pattern ends with an ellipsis, making it open. For example, {foo, bar, ..}.

Capture(LocIdent)

The pattern ends with an ellispis and a variable capturing the rest of the record. For example, {foo, bar, ..rest}.

Implementations

impl TailPattern

pub fn is_open(&self) -> bool

Check if this tail pattern makes the enclosing data structure pattern open, meaning that it accepts additional fields or elements to be present, whether the rest is captured or not.

Trait Implementations

impl Clone for TailPattern

fn clone(&self) -> TailPattern

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TailPattern

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

Formats the value using the given formatter.

impl PartialEq for TailPattern

fn eq(&self, other: &TailPattern) -> 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 Eq for TailPattern

impl StructuralPartialEq for TailPattern