[−][src]Struct syntax::tokenstream::TokenStream
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Token Streams
A TokenStream
is an abstract sequence of tokens, organized into TokenTree
s.
The goal is for procedural macros to work with TokenStream
s and TokenTree
s
instead of a representation of the abstract syntax tree.
Today's TokenTree
s can still contain AST via Token::Interpolated
for back-compat.
Fields
kind: TokenStreamKind
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Methods
impl TokenStream
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impl TokenStream
pub(crate) fn add_comma(&self) -> Option<(TokenStream, Span)>
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pub(crate) fn add_comma(&self) -> Option<(TokenStream, Span)>
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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
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impl TokenStream
pub fn len(&self) -> usize
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pub fn len(&self) -> usize
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pub fn empty() -> TokenStream
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pub fn empty() -> TokenStream
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pub fn is_empty(&self) -> bool
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pub fn is_empty(&self) -> bool
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pub fn concat(streams: Vec<TokenStream>) -> TokenStream
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pub fn concat(streams: Vec<TokenStream>) -> TokenStream
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fn concat_rc_vec(streams: RcVec<TokenStream>) -> TokenStream
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fn concat_rc_vec(streams: RcVec<TokenStream>) -> TokenStream
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ⓘImportant traits for Cursorpub fn trees(&self) -> Cursor
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pub fn trees(&self) -> Cursor
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ⓘImportant traits for Cursorpub fn into_trees(self) -> Cursor
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pub fn into_trees(self) -> Cursor
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pub fn eq_unspanned(&self, other: &TokenStream) -> bool
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pub fn eq_unspanned(&self, other: &TokenStream) -> bool
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Compares two TokenStreams, checking equality without regarding span information.
pub fn probably_equal_for_proc_macro(&self, other: &TokenStream) -> bool
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pub fn probably_equal_for_proc_macro(&self, other: &TokenStream) -> bool
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pub fn as_tree(self) -> (TokenTree, bool)
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pub fn as_tree(self) -> (TokenTree, bool)
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Precondition: self
consists of a single token tree.
Returns true if the token tree is a joint operation w.r.t. proc_macro::TokenNode
.
pub fn map_enumerated<F: FnMut(usize, TokenTree) -> TokenTree>(
self,
f: F
) -> TokenStream
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pub fn map_enumerated<F: FnMut(usize, TokenTree) -> TokenTree>(
self,
f: F
) -> TokenStream
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pub fn map<F: FnMut(TokenTree) -> TokenTree>(self, f: F) -> TokenStream
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pub fn map<F: FnMut(TokenTree) -> TokenTree>(self, f: F) -> TokenStream
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fn first_tree_and_joint(&self) -> Option<(TokenTree, bool)>
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fn first_tree_and_joint(&self) -> Option<(TokenTree, bool)>
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fn last_tree_if_joint(&self) -> Option<TokenTree>
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fn last_tree_if_joint(&self) -> Option<TokenTree>
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Trait Implementations
impl Clone for TokenStream
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impl Clone for TokenStream
fn clone(&self) -> TokenStream
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fn clone(&self) -> TokenStream
Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)
1.0.0[src]
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from source
. Read more
impl Debug for TokenStream
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impl Debug for TokenStream
fn fmt(&self, f: &mut Formatter) -> Result
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fn fmt(&self, f: &mut Formatter) -> Result
Formats the value using the given formatter. Read more
impl From<TokenTree> for TokenStream
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impl From<TokenTree> for TokenStream
fn from(tt: TokenTree) -> TokenStream
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fn from(tt: TokenTree) -> TokenStream
Performs the conversion.
impl From<Token> for TokenStream
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impl From<Token> for TokenStream
fn from(token: Token) -> TokenStream
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fn from(token: Token) -> TokenStream
Performs the conversion.
impl<T: Into<TokenStream>> FromIterator<T> for TokenStream
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impl<T: Into<TokenStream>> FromIterator<T> for TokenStream
fn from_iter<I: IntoIterator<Item = T>>(iter: I) -> Self
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fn from_iter<I: IntoIterator<Item = T>>(iter: I) -> Self
Creates a value from an iterator. Read more
impl Extend<TokenStream> for TokenStream
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impl Extend<TokenStream> for TokenStream
fn extend<I: IntoIterator<Item = TokenStream>>(&mut self, iter: I)
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fn extend<I: IntoIterator<Item = TokenStream>>(&mut self, iter: I)
Extends a collection with the contents of an iterator. Read more
impl Eq for TokenStream
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impl Eq for TokenStream
fn assert_receiver_is_total_eq(&self)
1.0.0[src]
fn assert_receiver_is_total_eq(&self)
impl PartialEq<TokenStream> for TokenStream
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impl PartialEq<TokenStream> for TokenStream
fn eq(&self, other: &TokenStream) -> bool
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fn eq(&self, other: &TokenStream) -> bool
This method tests for self
and other
values to be equal, and is used by ==
. Read more
#[must_use]
fn ne(&self, other: &Rhs) -> bool
1.0.0[src]
#[must_use]
fn ne(&self, other: &Rhs) -> bool
This method tests for !=
.
impl From<TokenStream> for ThinTokenStream
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impl From<TokenStream> for ThinTokenStream
fn from(stream: TokenStream) -> ThinTokenStream
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fn from(stream: TokenStream) -> ThinTokenStream
Performs the conversion.
impl From<ThinTokenStream> for TokenStream
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impl From<ThinTokenStream> for TokenStream
fn from(stream: ThinTokenStream) -> TokenStream
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fn from(stream: ThinTokenStream) -> TokenStream
Performs the conversion.
impl Display for TokenStream
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impl Display for TokenStream
fn fmt(&self, f: &mut Formatter) -> Result
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fn fmt(&self, f: &mut Formatter) -> Result
Formats the value using the given formatter. Read more
impl Encodable for TokenStream
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impl Encodable for TokenStream
fn encode<E: Encoder>(&self, encoder: &mut E) -> Result<(), E::Error>
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fn encode<E: Encoder>(&self, encoder: &mut E) -> Result<(), E::Error>
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impl Decodable for TokenStream
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impl Decodable for TokenStream
Auto Trait Implementations
impl !Send for TokenStream
impl !Send for TokenStream
impl !Sync for TokenStream
impl !Sync for TokenStream
Blanket Implementations
impl<T> ToOwned for T where
T: Clone,
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impl<T> ToOwned for T where
T: Clone,
type Owned = T
fn to_owned(&self) -> T
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fn to_owned(&self) -> T
Creates owned data from borrowed data, usually by cloning. Read more
fn clone_into(&self, target: &mut T)
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fn clone_into(&self, target: &mut T)
🔬 This is a nightly-only experimental API. (toowned_clone_into
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recently added
Uses borrowed data to replace owned data, usually by cloning. Read more
impl<T> From for T
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impl<T> From for T
impl<T> ToString for T where
T: Display + ?Sized,
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impl<T> ToString for T where
T: Display + ?Sized,
impl<T, U> Into for T where
U: From<T>,
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impl<T, U> Into for T where
U: From<T>,
impl<T, U> TryFrom for T where
T: From<U>,
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impl<T, U> TryFrom for T where
T: From<U>,
type Error = !
try_from
)The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
try_from
)Performs the conversion.
impl<T> Borrow for T where
T: ?Sized,
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impl<T> Borrow for T where
T: ?Sized,
ⓘImportant traits for &'a mut Rfn borrow(&self) -> &T
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fn borrow(&self) -> &T
Immutably borrows from an owned value. Read more
impl<T, U> TryInto for T where
U: TryFrom<T>,
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impl<T, U> TryInto for T where
U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
try_from
)The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
try_from
)Performs the conversion.
impl<T> BorrowMut for T where
T: ?Sized,
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impl<T> BorrowMut for T where
T: ?Sized,
ⓘImportant traits for &'a mut Rfn borrow_mut(&mut self) -> &mut T
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fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
impl<T> Any for T where
T: 'static + ?Sized,
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impl<T> Any for T where
T: 'static + ?Sized,
fn get_type_id(&self) -> TypeId
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fn get_type_id(&self) -> TypeId
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this method will likely be replaced by an associated static
Gets the TypeId
of self
. Read more
impl<T> Encodable for T where
T: UseSpecializedEncodable + ?Sized,
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impl<T> Encodable for T where
T: UseSpecializedEncodable + ?Sized,
fn encode<E>(&self, e: &mut E) -> Result<(), <E as Encoder>::Error> where
E: Encoder,
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fn encode<E>(&self, e: &mut E) -> Result<(), <E as Encoder>::Error> where
E: Encoder,
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impl<T> Decodable for T where
T: UseSpecializedDecodable,
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impl<T> Decodable for T where
T: UseSpecializedDecodable,
fn decode<D>(d: &mut D) -> Result<T, <D as Decoder>::Error> where
D: Decoder,
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fn decode<D>(d: &mut D) -> Result<T, <D as Decoder>::Error> where
D: Decoder,
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impl<E> SpecializationError for E
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impl<E> SpecializationError for E
fn not_found<S, T>(trait_name: &'static str, method_name: &'static str) -> E where
T: ?Sized,
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fn not_found<S, T>(trait_name: &'static str, method_name: &'static str) -> E where
T: ?Sized,
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Create an error for a missing method specialization. Defaults to panicking with type, trait & method names. S
is the encoder/decoder state type, T
is the type being encoded/decoded, and the arguments are the names of the trait and method that should've been overridden. Read more
impl<T> Erased for T
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impl<T> Erased for T
impl<T> Send for T where
T: ?Sized,
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impl<T> Send for T where
T: ?Sized,
impl<T> Sync for T where
T: ?Sized,
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impl<T> Sync for T where
T: ?Sized,
impl<T> Erased for T
impl<T> Erased for T