Enum amplify_derive_helpers::Attr

pub enum Attr {
    Singular(SingularAttr),
    Parametrized(ParametrizedAttr),
}

Structure representing internal structure of collected instances of a proc macro attribute having some specific name (accessible via Attr::name()).

Variants

Singular(SingularAttr)

Attribute of #[attr] or #[attr = value] form, which, aside from the case where value is a string literal, may have only a single occurrence (string literals are concatenated into a single value like rust compiler does for #[doc = "..."] attributes).

Parametrized(ParametrizedAttr)

Parametrized attribute in form of #[attr(...)], where parameters are gathered from all attribute occurrences.

Implementations

impl Attr

pub fn singular_or_err(self) -> Result<SingularAttr, Error>

pub fn parametrized_or_err(self) -> Result<ParametrizedAttr, Error>

pub fn name(&self) -> Ident

pub fn value(&self) -> Result<ArgValue, Error>

pub fn literal_value(&self) -> Result<Lit, Error>

pub fn type_value(&self) -> Result<Type, Error>

pub fn with_attribute(attr: &Attribute) -> Result<Self, Error>

Trait Implementations

impl Clone for Attr

fn clone(&self) -> Attr

Returns a copy of the value.

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

Performs copy-assignment from source.