Struct rune::ast::ExprClosure

pub struct ExprClosure {
    pub id: Option<Id>,
    pub attributes: Vec<Attribute>,
    pub async_token: Option<Async>,
    pub move_token: Option<Move>,
    pub args: ExprClosureArgs,
    pub body: Expr,
}

A closure expression.

Examples

use rune::{testing, ast};

testing::roundtrip::<ast::ExprClosure>("async || 42");
testing::roundtrip::<ast::ExprClosure>("|| 42");
testing::roundtrip::<ast::ExprClosure>("|| { 42 }");
testing::roundtrip::<ast::ExprClosure>("move || { 42 }");
testing::roundtrip::<ast::ExprClosure>("async move || { 42 }");

let expr = testing::roundtrip::<ast::ExprClosure>("#[retry(n=3)]  || 43");
assert_eq!(expr.attributes.len(), 1);

let expr = testing::roundtrip::<ast::ExprClosure>("#[retry(n=3)] async || 43");
assert_eq!(expr.attributes.len(), 1);

Fields

id: Option<Id>

Opaque identifier for the closure.

attributes: Vec<Attribute>

The attributes for the async closure

async_token: Option<Async>

If the closure is async or not.

move_token: Option<Move>

If the closure moves data into it.

args: ExprClosureArgs

Arguments to the closure.

body: Expr

The body of the closure.

Implementations

impl ExprClosure

pub fn parse_with_meta(
    parser: &mut Parser<'_>,
    attributes: Vec<Attribute>,
    async_token: Option<Async>,
    move_token: Option<Move>
) -> Result<Self, ParseError>

Parse #ident and attach the given meta

impl ExprClosure

pub fn item_span(&self) -> Span

Get the identifying span for this closure.

Trait Implementations

impl Clone for ExprClosure

fn clone(&self) -> ExprClosure

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ExprClosure

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

Formats the value using the given formatter.

impl Eq for ExprClosure

impl Parse for ExprClosure

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

Parse the current item from the parser.

impl PartialEq<ExprClosure> for ExprClosure

fn eq(&self, other: &ExprClosure) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &ExprClosure) -> bool

This method tests for !=.

impl Spanned for ExprClosure

fn span(&self) -> Span

Get the span of the type.

impl StructuralEq for ExprClosure

impl StructuralPartialEq for ExprClosure

impl ToTokens for ExprClosure

fn to_tokens(&self, context: &MacroContext, stream: &mut TokenStream)

Turn the current item into tokens.