Struct Variant 

#[repr(C)]
pub struct Variant {
    pub name: &'static str,
    pub discriminant: Option<i64>,
    pub attributes: &'static [VariantAttribute],
    pub data: StructType,
    pub doc: &'static [&'static str],
}

Describes a variant of an enum

Fields

name: &'static str

Name of the variant, e.g. Foo for enum FooBar { Foo, Bar }

discriminant: Option<i64>

Discriminant value (if available). Might fit in a u8, etc.

attributes: &'static [VariantAttribute]

Attributes set for this variant via the derive macro

data: StructType

Fields for this variant (empty if unit, number-named if tuple). IMPORTANT: the offset for the fields already takes into account the size & alignment of the discriminant.

doc: &'static [&'static str]

Doc comment for the variant

Implementations

impl Variant

pub fn has_attr(&self, ns: Option<&str>, key: &str) -> bool

Checks whether the Variant has an attribute with the given namespace and key.

Use None for builtin attributes, Some("ns") for namespaced attributes.

pub fn get_attr(&self, ns: Option<&str>, key: &str) -> Option<&Attr>

Gets an attribute by namespace and key.

Use None for builtin attributes, Some("ns") for namespaced attributes.

pub fn has_builtin_attr(&self, key: &str) -> bool

Checks whether the Variant has a builtin attribute with the given key.

pub fn get_builtin_attr(&self, key: &str) -> Option<&Attr>

Gets a builtin attribute by key.

Trait Implementations

impl Clone for Variant

fn clone(&self) -> Variant

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Variant

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

Formats the value using the given formatter.

impl Copy for Variant