Enum FnArg

#[non_exhaustive]
pub enum FnArg {
    SelfValue(SelfValue),
    Pat(Pat),
}

A single argument in a closure.

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.

SelfValue(SelfValue)

The self parameter.

Pat(Pat)

Function argument is a pattern binding.

Trait Implementations

impl Debug for FnArg

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

Formats the value using the given formatter.

impl OptionSpanned for FnArg

fn option_span(&self) -> Option<Span>

Get the optional span of the type.

impl Parse for FnArg

fn parse(p: &mut Parser<'_>) -> Result<Self, Error>

Parse the current item from the parser.

impl PartialEq for FnArg

fn eq(&self, other: &FnArg) -> 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 Spanned for FnArg

fn span(&self) -> Span

Get the span of the type.

impl ToTokens for FnArg

fn to_tokens( &self, context: &mut MacroContext<'_, '_, '_>, stream: &mut TokenStream, ) -> Result<()>

Turn the current item into tokens.

impl TryClone for FnArg

fn try_clone(&self) -> Result<Self>

Try to clone the current value, raising an allocation error if it’s unsuccessful.

fn try_clone_from(&mut self, source: &Self) -> Result<(), Error>

Performs copy-assignment from source.

impl Eq for FnArg

impl StructuralPartialEq for FnArg