Enum MetaValue

pub enum MetaValue {
    Path(Path),
    Lit(Lit),
    Symbol(Symbol),
}

Represents a value in a meta name-value pair.

Variants

Path(Path)

Lit(Lit)

Symbol(Symbol)

Implementations

impl MetaValue

pub fn as_bool(&self) -> Option<bool>

Returns the value of the literal if it is a boolean literal.

pub fn as_string(&self) -> Option<String>

Returns the value of the literal if it is a string literal.

pub fn as_lit_int(&self) -> Option<&LitInt>

Returns the literal if it is an integer literal.

pub fn as_lit_bool(&self) -> Option<&LitBool>

Returns the literal if it is a boolean literal.

pub fn as_lit_string(&self) -> Option<&LitStr>

Returns the literal if it is a string literal.

pub fn as_path(&self) -> Option<&Path>

Returns the path (if the value is a path).

Trait Implementations

impl Clone for MetaValue

fn clone(&self) -> MetaValue

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for MetaValue

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

Formats the value using the given formatter.

impl Hash for MetaValue

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 MetaValue

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

impl PartialEq for MetaValue

fn eq(&self, other: &MetaValue) -> 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 MetaValue

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 TryFrom<&MetaValue> for Namespace

type Error = Error

The type returned in the event of a conversion error.

fn try_from(value: &MetaValue) -> Result<Self, Self::Error>

Performs the conversion.

impl TryFrom<&MetaValue> for SignatureTopicArg

type Error = Error

The type returned in the event of a conversion error.

fn try_from(value: &MetaValue) -> Result<Self, Self::Error>

Performs the conversion.

impl Eq for MetaValue

impl StructuralPartialEq for MetaValue