Enum Pattern 

pub enum Pattern {
    Wildcard,
    Literal(Literal),
    Ident(String),
    EmptyList,
    Cons(String, String),
    Tuple(Vec<Pattern>),
    Constructor(String, Vec<String>),
}

Variants

Wildcard

Literal(Literal)

Ident(String)

EmptyList

Empty list pattern: []

Cons(String, String)

Cons-like list pattern: [head, ..tail]

Tuple(Vec<Pattern>)

Tuple pattern: (a, b) / (_, x) / nested tuples.

Constructor(String, Vec<String>)

Constructor pattern: name + list of binding names. Built-ins: Ok(x), Err(x), Some(x), None → vec![“x”] or vec![] User-defined: Circle(r), Rect(w, h), Point → vec![“r”], vec![“w”,“h”], vec![]

Trait Implementations

impl Clone for Pattern

fn clone(&self) -> Pattern

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Pattern

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

Formats the value using the given formatter.

impl PartialEq for Pattern

fn eq(&self, other: &Pattern) -> 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 Pattern