[][src]Struct proc_macro2::TokenStream

pub struct TokenStream { /* fields omitted */ }

An abstract stream of tokens, or more concretely a sequence of token trees.

This type provides interfaces for iterating over token trees and for collecting token trees into one stream.

Token stream is both the input and output of #[proc_macro], #[proc_macro_attribute] and #[proc_macro_derive] definitions.

Methods

impl TokenStream
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Returns an empty TokenStream containing no token trees.

Deprecated since 0.4.4

: please use TokenStream::new

Checks if this TokenStream is empty.

Trait Implementations

impl Default for TokenStream
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TokenStream::default() returns an empty stream, i.e. this is equivalent with TokenStream::new().

Returns the "default value" for a type. Read more

impl From<TokenStream> for TokenStream
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Performs the conversion.

impl From<TokenStream> for TokenStream
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Performs the conversion.

impl Clone for TokenStream
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Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

impl IntoIterator for TokenStream
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The type of the elements being iterated over.

Which kind of iterator are we turning this into?

Important traits for IntoIter

Creates an iterator from a value. Read more

impl Extend<TokenTree> for TokenStream
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Extends a collection with the contents of an iterator. Read more

impl Extend<TokenStream> for TokenStream
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Extends a collection with the contents of an iterator. Read more

impl Debug for TokenStream
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Prints token in a form convenient for debugging.

Formats the value using the given formatter. Read more

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::Groups with Delimiter::None delimiters and negative numeric literals.

Formats the value using the given formatter. Read more

impl FromIterator<TokenTree> for TokenStream
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Collects a number of token trees into a single stream.

Creates a value from an iterator. Read more

impl FromIterator<TokenStream> for TokenStream
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Creates a value from an iterator. Read more

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.

NOTE: Some errors may cause panics instead of returning LexError. We reserve the right to change these errors into LexErrors later.

The associated error which can be returned from parsing.

Parses a string s to return a value of this type. Read more

Auto Trait Implementations

impl !Send for TokenStream

impl !Sync for TokenStream

Blanket Implementations

impl<T, U> Into for T where
    U: From<T>, 
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Performs the conversion.

impl<T> ToString for T where
    T: Display + ?Sized
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Converts the given value to a String. Read more

impl<T> ToOwned for T where
    T: Clone
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Creates owned data from borrowed data, usually by cloning. Read more

🔬 This is a nightly-only experimental API. (toowned_clone_into)

recently added

Uses borrowed data to replace owned data, usually by cloning. Read more

impl<T> From for T
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Performs the conversion.

impl<I> IntoIterator for I where
    I: Iterator
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The type of the elements being iterated over.

Which kind of iterator are we turning this into?

Creates an iterator from a value. Read more

impl<T, U> TryFrom for T where
    T: From<U>, 
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🔬 This is a nightly-only experimental API. (try_from)

The type returned in the event of a conversion error.

🔬 This is a nightly-only experimental API. (try_from)

Performs the conversion.

impl<T> Borrow for T where
    T: ?Sized
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Immutably borrows from an owned value. Read more

impl<T> BorrowMut for T where
    T: ?Sized
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Mutably borrows from an owned value. Read more

impl<T, U> TryInto for T where
    U: TryFrom<T>, 
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🔬 This is a nightly-only experimental API. (try_from)

The type returned in the event of a conversion error.

🔬 This is a nightly-only experimental API. (try_from)

Performs the conversion.

impl<T> Any for T where
    T: 'static + ?Sized
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🔬 This is a nightly-only experimental API. (get_type_id)

this method will likely be replaced by an associated static

Gets the TypeId of self. Read more

impl<E> SpecializationError for E
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🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

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> Send for T where
    T: ?Sized
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impl<T> Sync for T where
    T: ?Sized
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impl<T> Erased for T