# TokenBuffer in syn::buffer - Rust
A buffer that can be efficiently traversed multiple times, unlike `TokenStream` which requires a deep copy in order to traverse more than once.

syn::buffer

# Struct TokenBuffer

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    pub struct TokenBuffer { /* private fields */ }

Expand description

A buffer that can be efficiently traversed multiple times, unlike `TokenStream` which requires a deep copy in order to traverse more than once.

## Implementations§

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### impl TokenBuffer

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#### pub fn new(stream: TokenStream) -> Self

Creates a `TokenBuffer` containing all the tokens from the input `proc_macro::TokenStream`.

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#### pub fn new2(stream: TokenStream) -> Self

Creates a `TokenBuffer` containing all the tokens from the input `proc_macro2::TokenStream`.

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#### pub fn begin(&self) -> Cursor<'_>

Creates a cursor referencing the first token in the buffer and able to traverse until the end of the buffer.

## Auto Trait Implementations§

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### impl Freeze for TokenBuffer

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### impl RefUnwindSafe for TokenBuffer

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### impl !Send for TokenBuffer

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### impl !Sync for TokenBuffer

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### impl Unpin for TokenBuffer

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### impl UnwindSafe for TokenBuffer

## Blanket Implementations§

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### impl<T> Any for T
where T: 'static + ?Sized,

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#### fn type_id(&self) -> TypeId

Gets the `TypeId` of `self`. Read more
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### impl<T> Borrow<T> for T
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

Mutably borrows from an owned value. Read more
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### impl<T> From<T> for T

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#### fn from(t: T) -> T

Returns the argument unchanged.

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### impl<T, U> Into<U> for T
where U: From<T>,

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#### fn into(self) -> U

Calls `U::from(self)`.

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

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### impl<T, U> TryFrom<U> for T
where U: Into<T>,

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#### type Error = Infallible

The type returned in the event of a conversion error.
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#### fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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### impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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#### fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.