Enum Pat 

#[non_exhaustive]
pub enum Pat {
    Ident(PatIdent),
    Path(PatPath),
    Reference(PatReference),
    Struct(PatStruct),
    Tuple(PatTuple),
    TupleStruct(PatTupleStruct),
    Type(PatType),
    Wild(PatWild),
}

A pattern in a local binding, function signature, match expression, or various other places.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Ident(PatIdent)

A pattern that binds a new variable: ref mut binding @ SUBPATTERN.

Path(PatPath)

A path pattern like Color::Red.

Reference(PatReference)

A reference pattern: &mut var.

Struct(PatStruct)

A struct or struct variant pattern: Variant { x, y, .. }.

Tuple(PatTuple)

A tuple pattern: (a, b).

TupleStruct(PatTupleStruct)

A tuple struct or tuple variant pattern: Variant(x, y, .., z).

Type(PatType)

A type ascription pattern: foo: f64.

Wild(PatWild)

A pattern that matches any value: _.

Implementations

impl Pat

pub fn parse_single(input: ParseStream<'_>) -> Result<Self>

Parse a pattern that does not involve | at the top level.

Trait Implementations

impl Clone for Pat

fn clone(&self) -> Pat

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl From<ExprPath> for Pat

fn from(e: PatPath) -> Pat

Converts to this type from the input type.

impl From<PatIdent> for Pat

fn from(e: PatIdent) -> Pat

Converts to this type from the input type.

impl From<PatReference> for Pat

fn from(e: PatReference) -> Pat

Converts to this type from the input type.

impl From<PatStruct> for Pat

fn from(e: PatStruct) -> Pat

Converts to this type from the input type.

impl From<PatTuple> for Pat

fn from(e: PatTuple) -> Pat

Converts to this type from the input type.

impl From<PatTupleStruct> for Pat

fn from(e: PatTupleStruct) -> Pat

Converts to this type from the input type.

impl From<PatType> for Pat

fn from(e: PatType) -> Pat

Converts to this type from the input type.

impl From<PatWild> for Pat

fn from(e: PatWild) -> Pat

Converts to this type from the input type.

impl ToTokens for Pat

fn to_tokens(&self, tokens: &mut TokenStream)

Write self to the given TokenStream.

fn to_token_stream(&self) -> TokenStream

Convert self directly into a TokenStream object.

fn into_token_stream(self) -> TokenStream

where Self: Sized,

Convert self directly into a TokenStream object.