pub(crate) enum AttributeOrder {
KeepFirst,
KeepLast,
}
Variants§
KeepFirst
Duplicates after the first attribute will be an error.
This should be used where duplicates would be ignored, but carry extra
meaning that could cause confusion. For example, #[stable(since="1.0")] #[stable(since="2.0")]
, which version should be used for stable
?
KeepLast
Duplicates preceding the last instance of the attribute will be a warning, with a note that this will be an error in the future.
This is the same as FutureWarnFollowing
, except the last attribute is
the one that is “used”. Ideally these can eventually migrate to
ErrorPreceding
.
Auto Trait Implementations§
impl DynSend for AttributeOrder
impl DynSync for AttributeOrder
impl Freeze for AttributeOrder
impl RefUnwindSafe for AttributeOrder
impl Send for AttributeOrder
impl Sync for AttributeOrder
impl Unpin for AttributeOrder
impl UnwindSafe for AttributeOrder
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Source§fn into_either(self, into_left: bool) -> Either<Self, Self>
fn into_either(self, into_left: bool) -> Either<Self, Self>
self
into a Left
variant of Either<Self, Self>
if into_left
is true
.
Converts self
into a Right
variant of Either<Self, Self>
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
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into a Left
variant of Either<Self, Self>
if into_left(&self)
returns true
.
Converts self
into a Right
variant of Either<Self, Self>
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impl<T> Pointable for T
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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: 1 byte
Size for each variant:
KeepFirst
: 0 bytesKeepLast
: 0 bytes