[−][src]Struct serde::ser::Impossible
Helper type for implementing a Serializer
that does not support
serializing one of the compound types.
This type cannot be instantiated, but implements every one of the traits
corresponding to the Serializer
compound types: SerializeSeq
,
SerializeTuple
, SerializeTupleStruct
, SerializeTupleVariant
,
SerializeMap
, SerializeStruct
, and SerializeStructVariant
.
impl Serializer for MySerializer { type Ok = (); type Error = Error; type SerializeSeq = Impossible<(), Error>; /* other associated types */ /// This data format does not support serializing sequences. fn serialize_seq(self, len: Option<usize>) -> Result<Self::SerializeSeq, Error> { // Given Impossible cannot be instantiated, the only // thing we can do here is to return an error. Err(...) } /* other Serializer methods */ }
Trait Implementations
impl<Ok, Error> SerializeSeq for Impossible<Ok, Error> where
Error: Error,
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Error: Error,
type Ok = Ok
Must match the Ok
type of our Serializer
.
type Error = Error
Must match the Error
type of our Serializer
.
fn serialize_element<T: ?Sized>(&mut self, value: &T) -> Result<(), Error> where
T: Serialize,
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T: Serialize,
fn end(self) -> Result<Ok, Error>
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impl<Ok, Error> SerializeTuple for Impossible<Ok, Error> where
Error: Error,
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Error: Error,
type Ok = Ok
Must match the Ok
type of our Serializer
.
type Error = Error
Must match the Error
type of our Serializer
.
fn serialize_element<T: ?Sized>(&mut self, value: &T) -> Result<(), Error> where
T: Serialize,
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T: Serialize,
fn end(self) -> Result<Ok, Error>
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impl<Ok, Error> SerializeTupleStruct for Impossible<Ok, Error> where
Error: Error,
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Error: Error,
type Ok = Ok
Must match the Ok
type of our Serializer
.
type Error = Error
Must match the Error
type of our Serializer
.
fn serialize_field<T: ?Sized>(&mut self, value: &T) -> Result<(), Error> where
T: Serialize,
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T: Serialize,
fn end(self) -> Result<Ok, Error>
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impl<Ok, Error> SerializeTupleVariant for Impossible<Ok, Error> where
Error: Error,
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Error: Error,
type Ok = Ok
Must match the Ok
type of our Serializer
.
type Error = Error
Must match the Error
type of our Serializer
.
fn serialize_field<T: ?Sized>(&mut self, value: &T) -> Result<(), Error> where
T: Serialize,
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T: Serialize,
fn end(self) -> Result<Ok, Error>
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impl<Ok, Error> SerializeMap for Impossible<Ok, Error> where
Error: Error,
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Error: Error,
type Ok = Ok
Must match the Ok
type of our Serializer
.
type Error = Error
Must match the Error
type of our Serializer
.
fn serialize_key<T: ?Sized>(&mut self, key: &T) -> Result<(), Error> where
T: Serialize,
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T: Serialize,
fn serialize_value<T: ?Sized>(&mut self, value: &T) -> Result<(), Error> where
T: Serialize,
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T: Serialize,
fn end(self) -> Result<Ok, Error>
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fn serialize_entry<K: ?Sized, V: ?Sized>(
&mut self,
key: &K,
value: &V
) -> Result<(), Self::Error> where
K: Serialize,
V: Serialize,
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&mut self,
key: &K,
value: &V
) -> Result<(), Self::Error> where
K: Serialize,
V: Serialize,
impl<Ok, Error> SerializeStruct for Impossible<Ok, Error> where
Error: Error,
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Error: Error,
type Ok = Ok
Must match the Ok
type of our Serializer
.
type Error = Error
Must match the Error
type of our Serializer
.
fn serialize_field<T: ?Sized>(
&mut self,
key: &'static str,
value: &T
) -> Result<(), Error> where
T: Serialize,
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&mut self,
key: &'static str,
value: &T
) -> Result<(), Error> where
T: Serialize,
fn end(self) -> Result<Ok, Error>
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fn skip_field(&mut self, key: &'static str) -> Result<(), Self::Error>
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impl<Ok, Error> SerializeStructVariant for Impossible<Ok, Error> where
Error: Error,
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Error: Error,
type Ok = Ok
Must match the Ok
type of our Serializer
.
type Error = Error
Must match the Error
type of our Serializer
.
fn serialize_field<T: ?Sized>(
&mut self,
key: &'static str,
value: &T
) -> Result<(), Error> where
T: Serialize,
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&mut self,
key: &'static str,
value: &T
) -> Result<(), Error> where
T: Serialize,
fn end(self) -> Result<Ok, Error>
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fn skip_field(&mut self, key: &'static str) -> Result<(), Self::Error>
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Auto Trait Implementations
impl<Ok, Error> Send for Impossible<Ok, Error> where
Error: Send,
Ok: Send,
Error: Send,
Ok: Send,
impl<Ok, Error> Sync for Impossible<Ok, Error> where
Error: Sync,
Ok: Sync,
Error: Sync,
Ok: Sync,
impl<Ok, Error> Unpin for Impossible<Ok, Error> where
Error: Unpin,
Ok: Unpin,
Error: Unpin,
Ok: Unpin,
impl<Ok, Error> UnwindSafe for Impossible<Ok, Error> where
Error: UnwindSafe,
Ok: UnwindSafe,
Error: UnwindSafe,
Ok: UnwindSafe,
impl<Ok, Error> RefUnwindSafe for Impossible<Ok, Error> where
Error: RefUnwindSafe,
Ok: RefUnwindSafe,
Error: RefUnwindSafe,
Ok: RefUnwindSafe,
Blanket Implementations
impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T> From<T> for T
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impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
ⓘImportant traits for &'_ mut Wfn borrow_mut(&mut self) -> &mut T
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impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,