Struct ItemFn 

#[non_exhaustive]
pub struct ItemFn {
    pub attributes: Vec<Attribute>,
    pub visibility: Visibility,
    pub const_token: Option<Const>,
    pub async_token: Option<Async>,
    pub fn_token: Fn,
    pub name: Ident,
    pub args: Parenthesized<FnArg, Comma>,
    pub output: Option<(Arrow, Type)>,
    pub body: Block,
    /* private fields */
}

A function item.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

attributes: Vec<Attribute>

The attributes for the fn

visibility: Visibility

The visibility of the fn item

const_token: Option<Const>

The optional const keyword.

async_token: Option<Async>

The optional async keyword.

fn_token: Fn

The fn token.

name: Ident

The name of the function.

args: Parenthesized<FnArg, Comma>

The arguments of the function.

output: Option<(Arrow, Type)>

The function type.

body: Block

The body of the function.

Implementations

impl ItemFn

pub fn parse_with_meta( parser: &mut Parser<'_>, attributes: Vec<Attribute>, visibility: Visibility, const_token: Option<Const>, async_token: Option<Async>, ) -> Result<Self, Error>

Parse #ident and attach the given meta

Trait Implementations

impl Debug for ItemFn

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

Formats the value using the given formatter.

impl OptionSpanned for ItemFn

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

Get the optional span of the type.

impl Parse for ItemFn

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

Parse the current item from the parser.

impl PartialEq for ItemFn

fn eq(&self, other: &ItemFn) -> 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 Peek for ItemFn

fn peek(p: &mut Peeker<'_>) -> bool

Peek the parser for the given token.

impl Spanned for ItemFn

fn span(&self) -> Span

Get the span of the type.

impl ToTokens for ItemFn

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

Turn the current item into tokens.

impl TryClone for ItemFn

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 ItemFn

impl StructuralPartialEq for ItemFn