Enum MetaValue 

pub enum MetaValue {
    Path(Path),
    NameValue(MetaNameValue),
    List(MetaList),
    Lit(Lit),
}

A meta item.

Variants

Path(Path)

NameValue(MetaNameValue)

List(MetaList)

Lit(Lit)

Implementations

impl MetaValue

pub fn path(&self) -> Result<&Path, Error>

Tries to take the value as a Path, returning an error if it isn’t a path.

pub fn name_value(&self) -> Result<&MetaNameValue, Error>

Tries to take the value as a MetaNameValue, returning an error if it isn’t one.

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

Tries to take the value as a Lit, returning an error if it isn’t a literal.

pub fn list(&self) -> Result<&MetaList, Error>

Tries to take the value as a [List], returning an error if it isn’t a list.

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

Attempts to get the value of the MetaValue.

As the various variants that MetaValue provides:

• MetaValue::Lit(lit): lit is the value.
• MetaValue::NameValue(nv): nv.value is the value.
• Otherwise, a proper error is generated.

pub fn name(&self) -> Option<&Ident>

Trait Implementations

impl Clone for MetaValue

fn clone(&self) -> MetaValue

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl From<Lit> for MetaValue

fn from(l: Lit) -> MetaValue

Converts to this type from the input type.

impl From<MetaList> for MetaValue

fn from(l: MetaList) -> MetaValue

Converts to this type from the input type.

impl Parse for MetaValue

fn parse(p: &ParseBuffer<'_>) -> Result<MetaValue, Error>