Enum syntex_syntax2::ext::tt::quoted::TokenTree

pub enum TokenTree {
    Token(Span, Token),
    Delimited(Span, Rc<Delimited>),
    Sequence(Span, Rc<SequenceRepetition>),
    MetaVarDecl(Span, Ident, Ident),
}

Similar to tokenstream::TokenTree, except that $i, $i:ident, and $(...) are "first-class" token trees.

Variants

Token(Span, Token)Delimited(Span, Rc<Delimited>)Sequence(Span, Rc<SequenceRepetition>)

A kleene-style repetition sequence with a span

MetaVarDecl(Span, Ident, Ident)

Matches a nonterminal. This is only used in the left hand side of MBE macros.

Methods

impl TokenTree

pub fn len(&self) -> usize

pub fn is_empty(&self) -> bool

pub fn get_tt(&self, index: usize) -> TokenTree

pub fn span(&self) -> Span

Retrieve the TokenTree's span.

Trait Implementations

impl PartialEq<TokenTree> for TokenTree

fn eq(&self, other: &TokenTree) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &TokenTree) -> bool

This method tests for !=.

impl Eq for TokenTree

impl Clone for TokenTree

fn clone(&self) -> TokenTree

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Hash for TokenTree

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, 

Feeds a slice of this type into the given [Hasher].

impl Debug for TokenTree

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for TokenTree

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error> where
    __D: Deserializer<'de>, 

Deserialize this value from the given Serde deserializer.

impl Serialize for TokenTree

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error> where
    __S: Serializer, 

Serialize this value into the given Serde serializer.