Struct Underscore

pub struct Underscore {
    pub spans: [Span; 1],
}

_

Usage: wildcard patterns, inferred types, unnamed items in constants, extern crates, use declarations, and destructuring assignment.

Don’t try to remember the name of this type — use the Token! macro instead.

Fields

spans: [Span; 1]

Trait Implementations

impl Clone for Underscore

Available on crate feature clone-impls only.

fn clone(&self) -> Self

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Underscore

Available on crate feature extra-traits only.

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

Formats the value using the given formatter.

impl Default for Underscore

fn default() -> Self

Returns the “default value” for a type.

impl Deref for Underscore

type Target = WithSpan

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl DerefMut for Underscore

fn deref_mut(&mut self) -> &mut Self::Target

Mutably dereferences the value.

impl From<Underscore> for Ident

fn from(token: Underscore) -> Ident

Converts to this type from the input type.

impl Hash for Underscore

Available on crate feature extra-traits only.

fn hash<H: Hasher>(&self, _state: &mut H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Parse for Underscore

Available on crate feature parsing only.

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

impl PartialEq for Underscore

Available on crate feature extra-traits only.

fn eq(&self, _other: &Underscore) -> 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 ToTokens for Underscore

Available on crate feature printing only.

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.

impl Copy for Underscore

Available on crate feature clone-impls only.

impl Eq for Underscore

Available on crate feature extra-traits only.

impl Token for Underscore

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 4 bytes