AttrTokenStream

rustc_ast::tokenstream

Struct AttrTokenStream 

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pub struct AttrTokenStream(pub Arc<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.

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§0: Arc<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_token_trees(&self) -> Vec<TokenTree>

Converts this AttrTokenStream to a plain Vec<TokenTree>. During conversion, any AttrTokenTree::AttrsTarget gets “flattened” back to a TokenStream, as described in the comment on attrs_and_tokens_to_token_trees.

Trait Implementations§

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impl Clone for AttrTokenStream

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fn clone(&self) -> AttrTokenStream

Returns a duplicate 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: SpanDecoder> 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: SpanEncoder> Encodable<__E> for AttrTokenStream

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

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impl<T> Aligned for T

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const ALIGN: Alignment

Alignment of Self.
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fn borrow_mut(&mut self) -> &mut T

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impl<T> CloneToUninit for T
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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
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fn instrument(self, span: Span) -> Instrumented<Self>

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Calls U::from(self).

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

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type Result = ()

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const ALIGN: usize

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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

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type Output = T

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type Error = Infallible

The type returned in the event of a conversion error.
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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: 8 bytes