1.15.0[−][src]Struct proc_macro::TokenStream
The main type provided by this crate, representing an abstract stream of tokens, or, more specifically, a sequence of token trees. The type provide interfaces for iterating over those token trees and, conversely, collecting a number of token trees into one stream.
This is both the input and output of #[proc_macro]
, #[proc_macro_attribute]
and #[proc_macro_derive]
definitions.
Methods
impl TokenStream
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pub fn new() -> TokenStream
1.29.0[src]
Returns an empty TokenStream
containing no token trees.
pub fn is_empty(&self) -> bool
1.29.0[src]
Checks if this TokenStream
is empty.
Trait Implementations
impl ToString for TokenStream
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impl !Send for TokenStream
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impl Clone for TokenStream
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fn clone(&self) -> TokenStream
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fn clone_from(&mut self, source: &Self)
1.0.0[src]
Performs copy-assignment from source
. Read more
impl Extend<TokenTree> for TokenStream
1.30.0[src]
fn extend<I: IntoIterator<Item = TokenTree>>(&mut self, trees: I)
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impl Extend<TokenStream> for TokenStream
1.30.0[src]
fn extend<I: IntoIterator<Item = TokenStream>>(&mut self, streams: I)
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impl !Sync for TokenStream
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impl From<TokenTree> for TokenStream
1.29.0[src]
Creates a token stream containing a single token tree.
fn from(tree: TokenTree) -> TokenStream
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impl IntoIterator for TokenStream
1.29.0[src]
type Item = TokenTree
The type of the elements being iterated over.
type IntoIter = IntoIter
Which kind of iterator are we turning this into?
ⓘImportant traits for IntoIterfn into_iter(self) -> IntoIter
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impl Display for TokenStream
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Prints the token stream as a string that is supposed to be losslessly convertible back
into the same token stream (modulo spans), except for possibly TokenTree::Group
s
with Delimiter::None
delimiters and negative numeric literals.
impl Debug for TokenStream
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Prints token in a form convenient for debugging.
impl FromStr for TokenStream
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Attempts to break the string into tokens and parse those tokens into a token stream.
May fail for a number of reasons, for example, if the string contains unbalanced delimiters
or characters not existing in the language.
All tokens in the parsed stream get Span::call_site()
spans.
NOTE: some errors may cause panics instead of returning LexError
. We reserve the right to
change these errors into LexError
s later.
type Err = LexError
The associated error which can be returned from parsing.
fn from_str(src: &str) -> Result<TokenStream, LexError>
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impl FromIterator<TokenTree> for TokenStream
1.29.0[src]
Collects a number of token trees into a single stream.
fn from_iter<I: IntoIterator<Item = TokenTree>>(trees: I) -> Self
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impl FromIterator<TokenStream> for TokenStream
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A "flattening" operation on token streams, collects token trees from multiple token streams into a single stream.
fn from_iter<I: IntoIterator<Item = TokenStream>>(streams: I) -> Self
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Blanket Implementations
impl<T> ToString for T where
T: Display + ?Sized,
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T: Display + ?Sized,
impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T> ToOwned for T where
T: Clone,
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T: Clone,
type Owned = T
The resulting type after obtaining ownership.
fn to_owned(&self) -> T
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fn clone_into(&self, target: &mut T)
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impl<T> From<T> for T
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impl<I> IntoIterator for I where
I: Iterator,
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I: Iterator,
type Item = <I as Iterator>::Item
The type of the elements being iterated over.
type IntoIter = I
Which kind of iterator are we turning this into?
fn into_iter(self) -> I
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impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
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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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
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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impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,