Struct proc_macro2::TokenStream [−][src]
pub struct TokenStream { /* fields omitted */ }
Expand description
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.
Implementations
Trait Implementations
Prints token in a form convenient for debugging.
TokenStream::default()
returns an empty stream,
i.e. this is equivalent with TokenStream::new()
.
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.
Extends a collection with the contents of an iterator. Read more
extend_one
)Extends a collection with exactly one element.
extend_one
)Reserves capacity in a collection for the given number of additional elements. Read more
Extends a collection with the contents of an iterator. Read more
extend_one
)Extends a collection with exactly one element.
extend_one
)Reserves capacity in a collection for the given number of additional elements. Read more
Performs the conversion.
Performs the conversion.
Creates a value from an iterator. Read more
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 LexError
s later.
Auto Trait Implementations
impl RefUnwindSafe for TokenStream
impl !Send for TokenStream
impl !Sync for TokenStream
impl Unpin for TokenStream
impl UnwindSafe for TokenStream
Blanket Implementations
Mutably borrows from an owned value. Read more