Enum PatternKind 

pub enum PatternKind {
    Identifier(Identifier),
    Array {
        elements: Vec<Option<Pattern>>,
    },
    Object {
        properties: Vec<ObjectPatternMember>,
    },
    Rest {
        argument: Box<Pattern>,
    },
    Assignment {
        left: Box<Pattern>,
        right: Box<Expression>,
    },
}

The shape of an ECMAScript binding pattern.

Variants

Identifier(Identifier)

A plain identifier binding (let x = ...).

Array

An array-destructuring pattern (let [a, , b, ...rest] = ...). None entries are holes; the final entry may be a Rest variant.

Fields

elements: Vec<Option<Pattern>>

Element patterns; None for sparse holes.

Object

An object-destructuring pattern (let { a, b: c, ...rest } = ...).

Fields

properties: Vec<ObjectPatternMember>

Properties and an optional final rest element.

Rest

A rest element used inside PatternKind::Array or as the final formal parameter (...args).

Fields

argument: Box<Pattern>

The pattern collecting the remaining elements.

Assignment

A pattern with a default value, used in destructuring or as a default formal parameter ({ a = 1 }, (x = 0) =>).

Fields

left: Box<Pattern>

The pattern receiving the value when one is supplied.

right: Box<Expression>

The default expression to use when no value is supplied.

Trait Implementations

impl Clone for PatternKind

fn clone(&self) -> PatternKind

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PatternKind

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

Formats the value using the given formatter.

impl Display for PatternKind

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

Formats the value using the given formatter.

impl Eq for PatternKind

impl PartialEq for PatternKind

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for PatternKind