Struct Attributes

pub struct Attributes { /* private fields */ }

Stores the Attributes that annotate an element.

Note that once stored in the Attributes, the Attributes lose the information about their enclosing AttributeDecl.

The map can contain erroneous attributes. A typical example s containing several attributes of an AttributeKind that allows only a single attribute to be applied, like, e.g., #[deprecated], or #[test].

When retrieving such attributes, we follow the last-wins approach and return the last attribute in the order of declaration.

Implementations

impl Attributes

pub fn new(attribute_decls: &[AttributeDecl]) -> Attributes

pub fn is_empty(&self) -> bool

pub fn first(&self) -> Option<&Attribute>

Returns the first attribute, ordered by span, or None if there are no attributes.

pub fn known_attribute_names(&self) -> &'static [&'static str]

pub fn all(&self) -> impl Iterator<Item = &Attribute>

pub fn all_as_slice(&self) -> &[Attribute]

pub fn all_by_kind<F>( &self, predicate: F, ) -> IndexMap<AttributeKind, Vec<&Attribute>>

where F: Fn(&&Attribute) -> bool,

pub fn of_kind(&self, kind: AttributeKind) -> impl Iterator<Item = &Attribute>

pub fn has_any_of_kind(&self, kind: AttributeKind) -> bool

pub fn unknown(&self) -> impl Iterator<Item = &Attribute>

pub fn has_allow_dead_code(&self) -> bool

pub fn has_allow_deprecated(&self) -> bool

pub fn has_error_type(&self) -> bool

pub fn has_error(&self) -> bool

pub fn inline(&self) -> Option<Inline>

Returns the value of the #[inline] Attribute, or None if the Attributes does not contain any #[inline] attributes.

pub fn purity(&self) -> Purity

Returns the value of the #[storage] Attribute, or Purity::Pure if the Attributes does not contain any #[storage] attributes.

pub fn deprecated(&self) -> Option<&Attribute>

Returns the #[deprecated] Attribute, or None if the Attributes does not contain any #[deprecated] attributes.

pub fn test(&self) -> Option<&Attribute>

Returns the #[test] Attribute, or None if the Attributes does not contain any #[test] attributes.

pub fn error(&self) -> Option<&Attribute>

Returns the #[error] Attribute, or None if the Attributes does not contain any #[error] attributes.

Trait Implementations

impl Clone for Attributes

fn clone(&self) -> Attributes

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Attributes

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

Formats the value using the given formatter.

impl Default for Attributes

fn default() -> Attributes

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Attributes

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for Attributes

fn eq(&self, other: &Attributes) -> 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 Serialize for Attributes

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for Attributes

impl StructuralPartialEq for Attributes