pub(crate) enum OnDuplicate<S: Stage> {
Warn,
WarnButFutureError,
Error,
Ignore,
Custom(fn(cx: &AcceptContext<'_, '_, S>, used: Span, unused: Span)),
}
Variants§
Warn
Give a default warning
WarnButFutureError
Duplicates will be a warning, with a note that this will be an error in the future.
Error
Give a default error
Ignore
Ignore duplicates
Custom(fn(cx: &AcceptContext<'_, '_, S>, used: Span, unused: Span))
Custom function called when a duplicate attribute is found.
unused
is the span of the attribute that was unused or bad because of some duplicate reason (seeAttributeOrder
)used
is the span of the attribute that was used in favor of the unused attribute
Implementations§
Source§impl<S: Stage> OnDuplicate<S>
impl<S: Stage> OnDuplicate<S>
fn exec<P: SingleAttributeParser<S>>( &self, cx: &mut AcceptContext<'_, '_, S>, used: Span, unused: Span, )
Auto Trait Implementations§
impl<S> DynSend for OnDuplicate<S>
impl<S> DynSync for OnDuplicate<S>
impl<S> Freeze for OnDuplicate<S>
impl<S> RefUnwindSafe for OnDuplicate<S>
impl<S> Send for OnDuplicate<S>
impl<S> Sync for OnDuplicate<S>
impl<S> Unpin for OnDuplicate<S>
impl<S> UnwindSafe for OnDuplicate<S>
Blanket Implementations§
Source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
Source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
Source§impl<T, R> CollectAndApply<T, R> for T
impl<T, R> CollectAndApply<T, R> for T
Source§impl<T> Filterable for T
impl<T> Filterable for T
Source§fn filterable(
self,
filter_name: &'static str,
) -> RequestFilterDataProvider<T, fn(DataRequest<'_>) -> bool>
fn filterable( self, filter_name: &'static str, ) -> RequestFilterDataProvider<T, fn(DataRequest<'_>) -> bool>
Creates a filterable data provider with the given name for debugging. Read more
Source§impl<T> Instrument for T
impl<T> Instrument for T
Source§fn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
Source§fn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
Source§impl<T> IntoEither for T
impl<T> IntoEither for T
Source§fn into_either(self, into_left: bool) -> Either<Self, Self>
fn into_either(self, into_left: bool) -> Either<Self, Self>
Converts
self
into a Left
variant of Either<Self, Self>
if into_left
is true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read moreSource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
Converts
self
into a Left
variant of Either<Self, Self>
if into_left(&self)
returns true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read moreSource§impl<T> Pointable for T
impl<T> Pointable for T
Source§impl<I, T, U> Upcast<I, U> for Twhere
U: UpcastFrom<I, T>,
impl<I, T, U> Upcast<I, U> for Twhere
U: UpcastFrom<I, T>,
Source§impl<I, T> UpcastFrom<I, T> for T
impl<I, T> UpcastFrom<I, T> for T
fn upcast_from(from: T, _tcx: I) -> T
Source§impl<T> WithSubscriber for T
impl<T> WithSubscriber for T
Source§fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
Source§fn with_current_subscriber(self) -> WithDispatch<Self>
fn with_current_subscriber(self) -> WithDispatch<Self>
impl<T> ErasedDestructor for Twhere
T: 'static,
impl<T> MaybeSendSync for T
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: 16 bytes
Size for each variant:
Warn
: 0 bytesWarnButFutureError
: 0 bytesError
: 0 bytesIgnore
: 0 bytesCustom
: 8 bytes