[−][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
.
# use serde::ser::{Serializer, Impossible};
# use serde::private::ser::Error;
#
# struct MySerializer;
#
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.
# stringify! {
Err(...)
# };
# unimplemented!()
}
/* other Serializer methods */
# serde::__serialize_unimplemented! {
# bool i8 i16 i32 i64 u8 u16 u32 u64 f32 f64 char str bytes none some
# unit unit_struct unit_variant newtype_struct newtype_variant
# tuple tuple_struct tuple_variant map struct struct_variant
# }
}
Trait Implementations
impl<Ok, Error> SerializeSeq for Impossible<Ok, Error> where
Error: Error,
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Error: Error,
impl<Ok, Error> SerializeTuple for Impossible<Ok, Error> where
Error: Error,
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Error: Error,
impl<Ok, Error> SerializeTupleStruct for Impossible<Ok, Error> where
Error: Error,
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Error: Error,
impl<Ok, Error> SerializeTupleVariant for Impossible<Ok, Error> where
Error: Error,
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Error: Error,
impl<Ok, Error> SerializeMap for Impossible<Ok, Error> where
Error: Error,
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Error: Error,
impl<Ok, Error> SerializeStruct for Impossible<Ok, Error> where
Error: Error,
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Error: Error,
impl<Ok, Error> SerializeStructVariant for Impossible<Ok, Error> where
Error: Error,
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Error: Error,
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,
Blanket Implementations
impl<T> From for T
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impl<T, U> Into for T where
U: From<T>,
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U: From<T>,
impl<T, U> TryFrom for T where
T: From<U>,
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T: From<U>,
type Error = !
🔬 This is a nightly-only experimental API. (
try_from
)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> Borrow for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut for T where
T: ?Sized,
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T: ?Sized,
ⓘImportant traits for &'a mut Wfn borrow_mut(&mut self) -> &mut T
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ⓘImportant traits for &'a mut W
impl<T, U> TryInto for T where
U: TryFrom<T>,
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U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
🔬 This is a nightly-only experimental API. (
try_from
)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> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,