pub struct AttrTokenStream(pub Lrc<Vec<AttrTokenTree>>);
Expand description

An AttrTokenStream is similar to a TokenStream, but with extra information about the tokens for attribute targets. This is used during expansion to perform early cfg-expansion, and to process attributes during proc-macro invocations.

Tuple Fields§

§0: Lrc<Vec<AttrTokenTree>>

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impl AttrTokenStream

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pub fn new(tokens: Vec<AttrTokenTree>) -> AttrTokenStream

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pub fn to_tokenstream(&self) -> TokenStream

Converts this AttrTokenStream to a plain TokenStream. During conversion, AttrTokenTree::Attributes get ‘flattened’ back to a TokenStream of the form outer_attr attr_target. If there are inner attributes, they are inserted into the proper place in the attribute target tokens.

Trait Implementations§

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impl Clone for AttrTokenStream

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fn clone(&self) -> AttrTokenStream

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 AttrTokenStream

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

Formats the value using the given formatter. Read more
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impl<__D: Decoder> Decodable<__D> for AttrTokenStream

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fn decode(__decoder: &mut __D) -> Self

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impl Default for AttrTokenStream

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fn default() -> AttrTokenStream

Returns the “default value” for a type. Read more
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impl<__E: Encoder> Encodable<__E> for AttrTokenStream

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fn encode(&self, __encoder: &mut __E)

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impl ToAttrTokenStream for AttrTokenStream

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for Twhere
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 Twhere
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 Twhere
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 Twhere
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> ToOwned for Twhere
T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for Twhere
U: Into<T>,

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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 Twhere
U: TryFrom<T>,

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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.

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: 8 bytes