Struct Args 

pub struct Args(/* private fields */);

A parsed list of attribute arguments.

Represents the comma-separated contents inside an attribute (e.g. the skip, rename = "foo" in #[my_attr(skip, rename = "foo")]).

Implementations

impl Args

pub fn new() -> Self

Creates an empty argument list.

pub fn has(&self, name: &str) -> bool

Returns true if an argument with the given name exists.

pub fn get(&self, name: &str) -> Option<&Arg>

Returns the first argument with the given name.

pub fn get_index(&self, index: usize) -> Option<&Arg>

Returns the argument at the given position.

pub fn iter(&self) -> impl Iterator<Item = &Arg>

Returns an iterator over the arguments.

pub fn len(&self) -> usize

Returns the number of arguments.

pub fn is_empty(&self) -> bool

Returns true if there are no arguments.

pub fn extend(&mut self, other: Args)

Appends all arguments from other, keeping duplicates.

pub fn merge(&self, other: &Args) -> Args

Merges two argument lists, with other taking precedence on name conflicts.

Trait Implementations

impl Clone for Args

fn clone(&self) -> Args

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Default for Args

fn default() -> Args

Returns the “default value” for a type.

impl FromArg for Args

fn from_arg(arg: &Arg) -> Result<Self>

impl Index<usize> for Args

type Output = Arg

The returned type after indexing.

fn index(&self, index: usize) -> &Self::Output

Performs the indexing (container[index]) operation.

impl<'a> IntoIterator for &'a Args

type Item = &'a Arg

The type of the elements being iterated over.

type IntoIter = Iter<'a, Arg>

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.

impl IntoIterator for Args

type Item = Arg

The type of the elements being iterated over.

type IntoIter = IntoIter<Arg>

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.

impl Parse for Args

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

impl ToTokens for Args

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.