Enum rocket_db_pools::figment::value::Empty
[−]pub enum Empty {
None,
Unit,
}
Expand description
A value with no value: None
or Unit
.
Variants
None
Like Option::None
.
Unit
Like ()
.
Implementations
Trait Implementations
impl<'de> Deserializer<'de> for Empty
impl<'de> Deserializer<'de> for Empty
type Error = Error
type Error = Error
The error type that can be returned if some error occurs during deserialization. Read more
fn deserialize_any<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, Error> where
V: Visitor<'de>,
fn deserialize_any<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, Error> where
V: Visitor<'de>,
Require the Deserializer
to figure out how to drive the visitor based
on what data type is in the input. Read more
fn deserialize_bool<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
fn deserialize_bool<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
Hint that the Deserialize
type is expecting a bool
value.
fn deserialize_u8<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
fn deserialize_u8<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
Hint that the Deserialize
type is expecting a u8
value.
fn deserialize_u16<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
fn deserialize_u16<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
Hint that the Deserialize
type is expecting a u16
value.
fn deserialize_u32<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
fn deserialize_u32<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
Hint that the Deserialize
type is expecting a u32
value.
fn deserialize_u64<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
fn deserialize_u64<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
Hint that the Deserialize
type is expecting a u64
value.
fn deserialize_i8<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
fn deserialize_i8<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
Hint that the Deserialize
type is expecting an i8
value.
fn deserialize_i16<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
fn deserialize_i16<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
Hint that the Deserialize
type is expecting an i16
value.
fn deserialize_i32<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
fn deserialize_i32<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
Hint that the Deserialize
type is expecting an i32
value.
fn deserialize_i64<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
fn deserialize_i64<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
Hint that the Deserialize
type is expecting an i64
value.
fn deserialize_f32<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
fn deserialize_f32<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
Hint that the Deserialize
type is expecting a f32
value.
fn deserialize_f64<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
fn deserialize_f64<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
Hint that the Deserialize
type is expecting a f64
value.
fn deserialize_char<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
fn deserialize_char<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
Hint that the Deserialize
type is expecting a char
value.
fn deserialize_str<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
fn deserialize_str<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
Hint that the Deserialize
type is expecting a string value and does
not benefit from taking ownership of buffered data owned by the
Deserializer
. Read more
fn deserialize_string<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
fn deserialize_string<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
Hint that the Deserialize
type is expecting a string value and would
benefit from taking ownership of buffered data owned by the
Deserializer
. Read more
fn deserialize_seq<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
fn deserialize_seq<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
Hint that the Deserialize
type is expecting a sequence of values.
fn deserialize_enum<V>(
self,
name: &'static str,
variants: &'static [&'static str],
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
fn deserialize_enum<V>(
self,
name: &'static str,
variants: &'static [&'static str],
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
Hint that the Deserialize
type is expecting an enum value with a
particular name and possible variants. Read more
fn deserialize_bytes<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
fn deserialize_bytes<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
Hint that the Deserialize
type is expecting a byte array and does not
benefit from taking ownership of buffered data owned by the
Deserializer
. Read more
fn deserialize_byte_buf<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
fn deserialize_byte_buf<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
Hint that the Deserialize
type is expecting a byte array and would
benefit from taking ownership of buffered data owned by the
Deserializer
. Read more
fn deserialize_map<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
fn deserialize_map<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
Hint that the Deserialize
type is expecting a map of key-value pairs.
fn deserialize_struct<V>(
self,
name: &'static str,
fields: &'static [&'static str],
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
fn deserialize_struct<V>(
self,
name: &'static str,
fields: &'static [&'static str],
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
Hint that the Deserialize
type is expecting a struct with a particular
name and fields. Read more
fn deserialize_unit<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
fn deserialize_unit<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
Hint that the Deserialize
type is expecting a unit value.
fn deserialize_newtype_struct<V>(
self,
name: &'static str,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
fn deserialize_newtype_struct<V>(
self,
name: &'static str,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
Hint that the Deserialize
type is expecting a newtype struct with a
particular name. Read more
fn deserialize_ignored_any<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
fn deserialize_ignored_any<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
Hint that the Deserialize
type needs to deserialize a value whose type
doesn’t matter because it is ignored. Read more
fn deserialize_unit_struct<V>(
self,
name: &'static str,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
fn deserialize_unit_struct<V>(
self,
name: &'static str,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
Hint that the Deserialize
type is expecting a unit struct with a
particular name. Read more
fn deserialize_tuple_struct<V>(
self,
name: &'static str,
len: usize,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
fn deserialize_tuple_struct<V>(
self,
name: &'static str,
len: usize,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
Hint that the Deserialize
type is expecting a tuple struct with a
particular name and number of fields. Read more
fn deserialize_tuple<V>(
self,
len: usize,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
fn deserialize_tuple<V>(
self,
len: usize,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
Hint that the Deserialize
type is expecting a sequence of values and
knows how many values there are without looking at the serialized data. Read more
fn deserialize_option<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
fn deserialize_option<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
Hint that the Deserialize
type is expecting an optional value. Read more
fn deserialize_identifier<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
fn deserialize_identifier<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Empty as Deserializer<'de>>::Error> where
V: Visitor<'de>,
Hint that the Deserialize
type is expecting the name of a struct
field or the discriminant of an enum variant. Read more
sourcefn deserialize_i128<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, Self::Error> where
V: Visitor<'de>,
fn deserialize_i128<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, Self::Error> where
V: Visitor<'de>,
Hint that the Deserialize
type is expecting an i128
value. Read more
sourcefn deserialize_u128<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, Self::Error> where
V: Visitor<'de>,
fn deserialize_u128<V>(
self,
visitor: V
) -> Result<<V as Visitor<'de>>::Value, Self::Error> where
V: Visitor<'de>,
Hint that the Deserialize
type is expecting an u128
value. Read more
sourcefn is_human_readable(&self) -> bool
fn is_human_readable(&self) -> bool
Determine whether Deserialize
implementations should expect to
deserialize their human-readable form. Read more
impl Serialize for Empty
impl Serialize for Empty
fn serialize<S>(
&self,
ser: S
) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error> where
S: Serializer,
fn serialize<S>(
&self,
ser: S
) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error> where
S: Serializer,
Serialize this value into the given Serde serializer. Read more
impl Copy for Empty
impl StructuralPartialEq for Empty
Auto Trait Implementations
impl RefUnwindSafe for Empty
impl Send for Empty
impl Sync for Empty
impl Unpin for Empty
impl UnwindSafe for Empty
Blanket Implementations
sourceimpl<T> BorrowMut<T> for T where
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
sourceimpl<T> Instrument for T
impl<T> Instrument for T
sourcefn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
sourcefn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
impl<T> IntoCollection<T> for T
impl<T> IntoCollection<T> for T
fn into_collection<A>(self) -> SmallVec<A> where
A: Array<Item = T>,
fn into_collection<A>(self) -> SmallVec<A> where
A: Array<Item = T>,
Converts self
into a collection.
fn mapped<U, F, A>(self, f: F) -> SmallVec<A> where
F: FnMut(T) -> U,
A: Array<Item = U>,
sourceimpl<T> ToOwned for T where
T: Clone,
impl<T> ToOwned for T where
T: Clone,
type Owned = T
type Owned = T
The resulting type after obtaining ownership.
sourcefn clone_into(&self, target: &mut T)
fn clone_into(&self, target: &mut T)
toowned_clone_into
)Uses borrowed data to replace owned data, usually by cloning. Read more
impl<V, T> VZip<V> for T where
V: MultiLane<T>,
impl<V, T> VZip<V> for T where
V: MultiLane<T>,
fn vzip(self) -> V
sourceimpl<T> WithSubscriber for T
impl<T> WithSubscriber for T
sourcefn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self> where
S: Into<Dispatch>,
fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self> where
S: Into<Dispatch>,
Attaches the provided Subscriber
to this type, returning a
WithDispatch
wrapper. Read more
sourcefn with_current_subscriber(self) -> WithDispatch<Self>
fn with_current_subscriber(self) -> WithDispatch<Self>
Attaches the current default Subscriber
to this type, returning a
WithDispatch
wrapper. Read more