# Struct syn::buffer::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.

This type is available only if Syn is built with the `"parsing"` feature.

## 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`.

This method is available only if Syn is built with both the `"parsing"` and `"proc-macro"` features.

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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

### impl RefUnwindSafe for TokenBuffer

### impl !Send for TokenBuffer

### impl !Sync for TokenBuffer

### impl Unpin for TokenBuffer

### 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,

const: unstable · source

#### 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,

const: unstable · source

#### 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

const: unstable · source

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

Returns the argument unchanged.

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

const: unstable · source

#### 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>,

#### type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

#### 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>,

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

The type returned in the event of a conversion error.

const: unstable · source

#### fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.