Struct TokenTreeCursor

pub struct TokenTreeCursor {
    pub stream: TokenStream,
    index: usize,
}

Owning by-value iterator over a TokenStream, that produces &TokenTree items.

Doesn’t impl Iterator because Rust doesn’t permit an owning iterator to return &T from next; the need for an explicit lifetime in the Item associated type gets in the way. Instead, use next_ref (which doesn’t involve associated types) for getting individual elements, or RefTokenTreeCursor if you really want an Iterator, e.g. in a for loop.

Fields

stream: TokenStream

index: usize

Implementations

impl TokenTreeCursor

fn new(stream: TokenStream) -> Self

pub fn next_ref(&mut self) -> Option<&TokenTree>

pub fn look_ahead(&self, n: usize) -> Option<&TokenTree>

Trait Implementations

impl Clone for TokenTreeCursor

fn clone(&self) -> TokenTreeCursor

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for TokenTreeCursor

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 16 bytes