Struct MacroAttribute

pub struct MacroAttribute { /* private fields */ }

Represents a macro attribute and its arguments like:

#[attribute(key="value")]

Implementations

impl MacroAttribute

pub fn new(attribute: Attribute) -> Result<Self>

Constructs a new MacroAttribute from an Attribute.

pub fn from_attribute_args( path: &str, attribute_args: AttributeArgs, style: AttrStyle, ) -> Self

Constructs a MacroAttribute from an AttributeArgs.

pub fn path(&self) -> &str

Returns the path of an attribute.

For #[attribute(name="value")] the path is "attribute".

pub fn style(&self) -> Option<&AttrStyle>

Returns the style of this attribute: outer or inner.

pub fn args(&self) -> &[MetaItem]

Returns the arguments of the attribute.

For #[attribute(name="value", number=10)] the arguments are "name=value" and "number=10".

pub fn len(&self) -> usize

Returns the number of arguments in this attribute.

pub fn is_empty(&self) -> bool

Returns true is this macro attribute have no arguments.

pub fn get(&self, index: usize) -> Option<&MetaItem>

Returns the MetaItem in the given index, or None if not found.

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

Returns an iterator over the arguments in this attribute.

pub fn into_name_values(self) -> Result<NameValueAttribute, NameValueError>

Converts this macro attribute into a name-value attribute.

pub fn into_inner(self) -> Vec<MetaItem>

Converts this macro attribute into a list of its arguments.

Trait Implementations

impl Clone for MacroAttribute

fn clone(&self) -> MacroAttribute

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for MacroAttribute

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

Formats the value using the given formatter.

impl Display for MacroAttribute

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

Formats the value using the given formatter.

impl Hash for MacroAttribute

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<I: SliceIndex<[MetaItem]>> Index<I> for MacroAttribute

type Output = <I as SliceIndex<[MetaItem]>>::Output

The returned type after indexing.

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

Performs the indexing (container[index]) operation.

impl<'a> IntoIterator for &'a MacroAttribute

type Item = &'a MetaItem

The type of the elements being iterated over.

type IntoIter = Iter<'a, MetaItem>

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.

impl IntoIterator for MacroAttribute

type Item = MetaItem

The type of the elements being iterated over.

type IntoIter = IntoIter<MetaItem>

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.

impl PartialEq for MacroAttribute

fn eq(&self, other: &MacroAttribute) -> 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 Eq for MacroAttribute

impl StructuralPartialEq for MacroAttribute