Enum Meta

pub enum Meta {
    Path(Path),
    NameValue(MetaNameValue),
}

Content of a compile-time structured attribute.

This is a subset of syn::Meta that allows the value of a name-value pair to be a plain identifier or path.

Variants

Path(Path)

A path, like message.

NameValue(MetaNameValue)

A name-value pair, like feature = "nightly".

Implementations

impl Meta

pub fn name(&self) -> &Path

Returns the meta-item name.

pub fn value(&self) -> Option<&MetaValue>

Returns the meta-item value (if any).

pub fn name_value(&self) -> Option<&MetaNameValue>

Returns the NameValue variant (if any).

Trait Implementations

impl Clone for Meta

fn clone(&self) -> Meta

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Meta

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

Formats the value using the given formatter.

impl Hash for Meta

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 Parse for Meta

fn parse(input: ParseStream<'_>) -> Result<Self, Error>

impl PartialEq for Meta

fn eq(&self, other: &Meta) -> 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 ToTokens for Meta

fn to_tokens(&self, tokens: &mut TokenStream2)

Write self to the given TokenStream.

fn to_token_stream(&self) -> TokenStream

Convert self directly into a TokenStream object.

fn into_token_stream(self) -> TokenStream

where Self: Sized,

Convert self directly into a TokenStream object.

impl Eq for Meta

impl StructuralPartialEq for Meta