Struct rustc_ast::tokenstream::TokenTreeCursor

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

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.

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§stream: TokenStream§index: usize

Implementations§

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impl TokenTreeCursor

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fn new(stream: TokenStream) -> Self

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

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

Trait Implementations§

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impl Clone for TokenTreeCursor

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fn clone(&self) -> TokenTreeCursor

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for TokenTreeCursor

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

Formats the value using the given formatter. Read more

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Blanket Implementations§

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impl<T> Aligned for T

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const ALIGN: Alignment = _

Alignment of Self.
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where T: 'static + ?Sized,

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where T: ?Sized,

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fn borrow(&self) -> &T

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

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fn borrow_mut(&mut self) -> &mut T

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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

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impl<T> Instrument for T

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That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoEither for T

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Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
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Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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type Output = T

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type Owned = T

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impl<T, U> TryFrom<U> for T
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type Error = Infallible

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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

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type Error = <U as TryFrom<T>>::Error

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
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impl<'a, T> Captures<'a> for T
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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