Struct ncryptf::serde::ser::Impossible
source · pub struct Impossible<Ok, Error> { /* private fields */ }Expand description
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§
source§impl<Ok, Error> SerializeMap for Impossible<Ok, Error>where
Error: Error,
impl<Ok, Error> SerializeMap for Impossible<Ok, Error>where
Error: Error,
source§impl<Ok, Error> SerializeSeq for Impossible<Ok, Error>where
Error: Error,
impl<Ok, Error> SerializeSeq for Impossible<Ok, Error>where
Error: Error,
source§impl<Ok, Error> SerializeStruct for Impossible<Ok, Error>where
Error: Error,
impl<Ok, Error> SerializeStruct for Impossible<Ok, Error>where
Error: Error,
source§impl<Ok, Error> SerializeStructVariant for Impossible<Ok, Error>where
Error: Error,
impl<Ok, Error> SerializeStructVariant for Impossible<Ok, Error>where
Error: Error,
source§impl<Ok, Error> SerializeTuple for Impossible<Ok, Error>where
Error: Error,
impl<Ok, Error> SerializeTuple for Impossible<Ok, Error>where
Error: Error,
source§impl<Ok, Error> SerializeTupleStruct for Impossible<Ok, Error>where
Error: Error,
impl<Ok, Error> SerializeTupleStruct for Impossible<Ok, Error>where
Error: Error,
source§impl<Ok, Error> SerializeTupleVariant for Impossible<Ok, Error>where
Error: Error,
impl<Ok, Error> SerializeTupleVariant for Impossible<Ok, Error>where
Error: Error,
Auto Trait Implementations§
impl<Ok, Error> RefUnwindSafe for Impossible<Ok, Error>where
Error: RefUnwindSafe,
Ok: RefUnwindSafe,
impl<Ok, Error> Send for Impossible<Ok, Error>
impl<Ok, Error> Sync for Impossible<Ok, Error>
impl<Ok, Error> Unpin for Impossible<Ok, Error>
impl<Ok, Error> UnwindSafe for Impossible<Ok, Error>where
Error: UnwindSafe,
Ok: UnwindSafe,
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
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fn borrow_mut(&mut self) -> &mut T
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>
§impl<T> IntoCollection<T> for T
impl<T> IntoCollection<T> for T
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A: Array<Item = T>,
fn into_collection<A>(self) -> SmallVec<A>where
A: Array<Item = T>,
self into a collection.fn mapped<U, F, A>(self, f: F) -> SmallVec<A>where
F: FnMut(T) -> U,
A: Array<Item = U>,
§impl<T> Paint for Twhere
T: ?Sized,
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Set background color to red using fg():
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