Enum Never 

pub enum Never {}

Trait Implementations

impl Clone for Never

fn clone(&self) -> Never

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Never

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

Formats the value using the given formatter.

impl IntoTokenTree for Never

fn into_token_tree(self) -> TokenTree

Available on crate feature proc-macro only.

fn into_token_tree2(self) -> TokenTree

Available on crate feature proc-macro2 only.

impl IntoTokens for Never

fn into_tokens(self, _: &mut TokenStream)

Available on crate feature proc-macro only.

fn into_token_stream(self) -> TokenStream

Available on crate feature proc-macro only.

fn into_tokens2(self, _: &mut TokenStream)

Available on crate feature proc-macro2 only.

fn into_token_stream2(self) -> TokenStream

Available on crate feature proc-macro2 only.

impl RefWithSpan for Never

type RefWithDefaultSpan<'a, S: Span> = Never where Self: 'a

type RefWithReplacedSpan<'a, S: Span> = Never where Self: 'a

fn ref_with_default_span<S: Span>( &self, _: S, ) -> Self::RefWithDefaultSpan<'_, S>

fn ref_with_replaced_span<S: Span>( &self, _: S, ) -> Self::RefWithReplacedSpan<'_, S>

impl ToTokenTree for Never

fn to_token_tree(&self) -> TokenTree

Available on crate feature proc-macro only.

fn to_token_tree2(&self) -> TokenTree

Available on crate feature proc-macro2 only.

impl ToTokens for Never

fn to_tokens(&self, _: &mut TokenStream)

Available on crate feature proc-macro only.

fn to_token_stream(&self) -> TokenStream

Available on crate feature proc-macro only.

fn to_tokens2(&self, _: &mut TokenStream)

Available on crate feature proc-macro2 only.

fn to_token_stream2(&self) -> TokenStream

Available on crate feature proc-macro2 only.

impl WithSpan for Never

type WithDefaultSpan<S: Span> = Never

type WithReplacedSpan<S: Span> = Never

fn with_default_span<S: Span>(self, _: S) -> Self::WithDefaultSpan<S>

fn with_replaced_span<S: Span>(self, _: S) -> Self::WithReplacedSpan<S>

impl Copy for Never

impl MaybeSpan for Never

impl Span for Never