[−][src]Enum syntax::ext::tt::quoted::TokenTree

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

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

Variants

Token(Token)Delimited(DelimSpan, Lrc<Delimited>)Sequence(DelimSpan, Lrc<SequenceRepetition>)

A kleene-style repetition sequence

MetaVar(Span, Ident)

e.g., $var

MetaVarDecl(Span, Ident, Ident)

e.g., $var:expr. This is only used in the left hand side of MBE macros.

Methods

`impl TokenTree`[src]

`pub fn len(&self) -> usize`[src]

Return the number of tokens in the tree.

`pub fn is_empty(&self) -> bool`[src]

Returns true if the given token tree contains no other tokens. This is vacuously true for single tokens or metavar/decls, but may be false for delimited trees or sequences.

`pub fn get_tt(&self, index: usize) -> TokenTree`[src]

Gets the index-th sub-token-tree. This only makes sense for delimited trees and sequences.

`pub fn span(&self) -> Span`[src]

Retrieves the TokenTree's span.

Trait Implementations

`impl PartialEq<TokenTree> for TokenTree`[src]

`fn eq(&self, other: &TokenTree) -> bool`[src]

`fn ne(&self, other: &TokenTree) -> bool`[src]

`impl Clone for TokenTree`[src]

`fn clone(&self) -> TokenTree`[src]

`fn clone_from(&mut self, source: &Self)`1.0.0[src]

Performs copy-assignment from source. Read more

`impl Debug for TokenTree`[src]

`fn fmt(&self, f: &mut Formatter) -> Result`[src]

`impl Encodable for TokenTree`[src]

`fn encode<S: Encoder>(&self, s: &mut S) -> Result<(), __S::Error>`[src]

`impl Decodable for TokenTree`[src]

`fn decode<D: Decoder>(d: &mut D) -> Result<TokenTree, __D::Error>`[src]

Auto Trait Implementations

`impl !Send for TokenTree`

`impl !Sync for TokenTree`

Blanket Implementations

`impl<T> ToOwned for T where T: Clone,` [src]

`type Owned = T`

The resulting type after obtaining ownership.

`fn to_owned(&self) -> T`[src]

`fn clone_into(&self, target: &mut T)`[src]

`impl<T, U> Into for T where U: From<T>,` [src]

`fn into(self) -> U`[src]

`impl<T> From<T> for T`[src]

`fn from(t: T) -> T`[src]

`impl<T, U> TryFrom for T where U: Into<T>,` [src]

`type Error = Infallible`

The type returned in the event of a conversion error.

`fn try_from(value: U) -> Result<T, <T as TryFrom>::Error>`[src]

`impl<T, U> TryInto for T where U: TryFrom<T>,` [src]

`type Error = >::Error`

The type returned in the event of a conversion error.

[−][src]Enum syntax::ext::tt::quoted::TokenTree

Variants

Methods

impl TokenTree[src]

pub fn len(&self) -> usize[src]

pub fn is_empty(&self) -> bool[src]

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

pub fn span(&self) -> Span[src]

Trait Implementations

impl PartialEq<TokenTree> for TokenTree[src]

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

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

impl Clone for TokenTree[src]

fn clone(&self) -> TokenTree[src]

fn clone_from(&mut self, source: &Self)1.0.0[src]

impl Debug for TokenTree[src]

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

impl Encodable for TokenTree[src]

fn encode<__S: Encoder>(&self, s: &mut __S) -> Result<(), __S::Error>[src]

impl Decodable for TokenTree[src]

fn decode<__D: Decoder>(d: &mut __D) -> Result<TokenTree, __D::Error>[src]

Auto Trait Implementations

impl !Send for TokenTree

impl !Sync for TokenTree

Blanket Implementations

impl<T> ToOwned for T where T: Clone, [src]

type Owned = T

fn to_owned(&self) -> T[src]

fn clone_into(&self, target: &mut T)[src]

impl<T, U> Into<U> for T where U: From<T>, [src]

fn into(self) -> U[src]

impl<T> From<T> for T[src]

fn from(t: T) -> T[src]

impl<T, U> TryFrom<U> for T where U: Into<T>, [src]

type Error = Infallible

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>[src]

impl<T, U> TryInto<U> for T where U: TryFrom<T>, [src]

type Error = <U as TryFrom<T>>::Error

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>[src]

impl<T> BorrowMut<T> for T where T: ?Sized, [src]

fn borrow_mut(&mut self) -> &mut T[src]

impl<T> Borrow<T> for T where T: ?Sized, [src]

fn borrow(&self) -> &T[src]

impl<T> Any for T where T: 'static + ?Sized, [src]

fn type_id(&self) -> TypeId[src]

impl<T> Encodable for T where T: UseSpecializedEncodable + ?Sized, [src]

default fn encode<E>(&self, e: &mut E) -> Result<(), <E as Encoder>::Error> where E: Encoder, [src]

impl<T> Decodable for T where T: UseSpecializedDecodable, [src]

default fn decode<D>(d: &mut D) -> Result<T, <D as Decoder>::Error> where D: Decoder, [src]

impl<E> SpecializationError for E[src]

default fn not_found<S, T>( trait_name: &'static str, method_name: &'static str) -> E where T: ?Sized, [src]

impl<T> Send for T where T: ?Sized, [src]

impl<T> Sync for T where T: ?Sized, [src]

impl<T> Erased for T[src]

`impl TokenTree`[src]

`pub fn len(&self) -> usize`[src]

`pub fn is_empty(&self) -> bool`[src]

`pub fn get_tt(&self, index: usize) -> TokenTree`[src]

`pub fn span(&self) -> Span`[src]

`impl PartialEq<TokenTree> for TokenTree`[src]

`fn eq(&self, other: &TokenTree) -> bool`[src]

`fn ne(&self, other: &TokenTree) -> bool`[src]

`impl Clone for TokenTree`[src]

`fn clone(&self) -> TokenTree`[src]

`fn clone_from(&mut self, source: &Self)`1.0.0[src]

`impl Debug for TokenTree`[src]

`fn fmt(&self, f: &mut Formatter) -> Result`[src]

`impl Encodable for TokenTree`[src]

`fn encode<S: Encoder>(&self, s: &mut S) -> Result<(), __S::Error>`[src]

`impl Decodable for TokenTree`[src]

`fn decode<D: Decoder>(d: &mut D) -> Result<TokenTree, __D::Error>`[src]

`impl !Send for TokenTree`

`impl !Sync for TokenTree`

`impl<T> ToOwned for T where T: Clone,` [src]

`type Owned = T`

`fn to_owned(&self) -> T`[src]

`fn clone_into(&self, target: &mut T)`[src]

`impl<T, U> Into<U> for T where U: From<T>,` [src]

`fn into(self) -> U`[src]

`impl<T> From<T> for T`[src]

`fn from(t: T) -> T`[src]

`impl<T, U> TryFrom<U> for T where U: Into<T>,` [src]

`type Error = Infallible`

`fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>`[src]

`impl<T, U> TryInto<U> for T where U: TryFrom<T>,` [src]

`type Error = <U as TryFrom<T>>::Error`

`fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>`[src]

`impl<T> BorrowMut<T> for T where T: ?Sized,` [src]

`fn borrow_mut(&mut self) -> &mut T`[src]

`impl<T> Borrow<T> for T where T: ?Sized,` [src]

`fn borrow(&self) -> &T`[src]

`impl<T> Any for T where T: 'static + ?Sized,` [src]

`fn type_id(&self) -> TypeId`[src]

`impl<T> Encodable for T where T: UseSpecializedEncodable + ?Sized,` [src]

`default fn encode<E>(&self, e: &mut E) -> Result<(), <E as Encoder>::Error> where E: Encoder,` [src]

`impl<T> Decodable for T where T: UseSpecializedDecodable,` [src]

`default fn decode<D>(d: &mut D) -> Result<T, <D as Decoder>::Error> where D: Decoder,` [src]

`impl<E> SpecializationError for E`[src]

`default fn not_found<S, T>( trait_name: &'static str, method_name: &'static str ) -> E where T: ?Sized,` [src]

`impl<T> Send for T where T: ?Sized,` [src]

`impl<T> Sync for T where T: ?Sized,` [src]

`impl<T> Erased for T`[src]