Struct proc_macro2::TokenStream [] [src]

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.

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Deprecated since 0.4.4

: please use TokenStream::new

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Checks if this TokenStream is empty.

Trait Implementations

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
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Creates an iterator from a value. Read more

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

1.0.0
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Performs copy-assignment from source. Read more

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

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Returns the "default value" for a type. 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.

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Parses a string s to return a value of this 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 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 FromIterator<TokenTree> for TokenStream
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Collects a number of token trees into a single stream.

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Creates a value from an iterator. 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.

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Formats the value using the given formatter. Read more

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

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Formats the value using the given formatter. Read more