Struct rustc_ast::tokenstream::TokenStream

pub struct TokenStream(pub(crate) Lrc<Vec<TreeAndSpacing>>);

A TokenStream is an abstract sequence of tokens, organized into TokenTrees.

The goal is for procedural macros to work with TokenStreams and TokenTrees instead of a representation of the abstract syntax tree. Today’s TokenTrees can still contain AST via token::Interpolated for backwards compatibility.

Implementations

impl TokenStream

pub fn add_comma(&self) -> Option<(TokenStream, Span)>

Given a TokenStream with a Stream of only two arguments, return a new TokenStream separating the two arguments with a comma for diagnostic suggestions.

impl TokenStream

pub fn new(streams: Vec<TreeAndSpacing>) -> TokenStream

pub fn is_empty(&self) -> bool

pub fn len(&self) -> usize

pub fn from_streams(streams: SmallVec<[TokenStream; 2]>) -> TokenStream

pub fn trees(&self) -> Cursor

pub fn into_trees(self) -> Cursor

pub fn eq_unspanned(&self, other: &TokenStream) -> bool

Compares two TokenStreams, checking equality without regarding span information.

pub fn map_enumerated<F: FnMut(usize, &TokenTree) -> TokenTree>(
    self,
    f: F
) -> TokenStream

Trait Implementations

impl Clone for TokenStream

fn clone(&self) -> TokenStream

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for TokenStream

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

Formats the value using the given formatter.

impl<__D: Decoder> Decodable<__D> for TokenStream

fn decode(__decoder: &mut __D) -> Result<Self, <__D as Decoder>::Error>

impl Default for TokenStream

fn default() -> TokenStream

Returns the “default value” for a type.

impl<__E: Encoder> Encodable<__E> for TokenStream

fn encode(&self, __encoder: &mut __E) -> Result<(), <__E as Encoder>::Error>

impl From<TokenTree> for TokenStream

fn from(tree: TokenTree) -> TokenStream

Performs the conversion.

impl FromIterator<TokenTree> for TokenStream

fn from_iter<I: IntoIterator<Item = TokenTree>>(iter: I) -> Self

Creates a value from an iterator.

impl<CTX> HashStable<CTX> for TokenStream where
    CTX: HashStableContext, 

fn hash_stable(&self, hcx: &mut CTX, hasher: &mut StableHasher)

impl PartialEq<TokenStream> for TokenStream

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

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

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

This method tests for !=.

impl Eq for TokenStream

Layout

Note: Most layout information is completely unstable and may be different between compiler versions and platforms. The only exception is types with certain repr(...) attributes. Please see the Rust Reference’s “Type Layout” chapter for details on type layout guarantees.

Size: 8 bytes