pub struct OptionCodec<C>(/* private fields */);
Expand description
Wraps a string codec that encodes T
to create a codec that encodes Option<T>
.
Example:
let original_value = Some(4);
let encoded = OptionCodec::<FromToStringCodec>::encode(&original_value).unwrap();
let decoded = OptionCodec::<FromToStringCodec>::decode(&encoded).unwrap();
assert_eq!(decoded, original_value);
Trait Implementations§
Source§impl<T, D> Decoder<Option<T>> for OptionCodec<D>
impl<T, D> Decoder<Option<T>> for OptionCodec<D>
Auto Trait Implementations§
impl<C> Freeze for OptionCodec<C>where
C: Freeze,
impl<C> RefUnwindSafe for OptionCodec<C>where
C: RefUnwindSafe,
impl<C> Send for OptionCodec<C>where
C: Send,
impl<C> Sync for OptionCodec<C>where
C: Sync,
impl<C> Unpin for OptionCodec<C>where
C: Unpin,
impl<C> UnwindSafe for OptionCodec<C>where
C: UnwindSafe,
Blanket Implementations§
Source§impl<T> ArchivePointee for T
impl<T> ArchivePointee for T
Source§type ArchivedMetadata = ()
type ArchivedMetadata = ()
The archived version of the pointer metadata for this type.
Source§fn pointer_metadata(
_: &<T as ArchivePointee>::ArchivedMetadata,
) -> <T as Pointee>::Metadata
fn pointer_metadata( _: &<T as ArchivePointee>::ArchivedMetadata, ) -> <T as Pointee>::Metadata
Converts some archived metadata to the pointer metadata for itself.
Source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
Source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
Source§impl<T, D> HybridDecoder<T, str> for D
impl<T, D> HybridDecoder<T, str> for D
type Error = <D as Decoder<T>>::Error
fn is_binary_decoder() -> bool
fn decode_str( val: &str, ) -> Result<T, HybridCoderError<<D as HybridDecoder<T, str>>::Error>>
fn decode_bin(_val: &[u8]) -> Result<T, HybridCoderError<Self::Error>>
Source§impl<T, E> HybridEncoder<T, String> for E
impl<T, E> HybridEncoder<T, String> for E
type Error = <E as Encoder<T>>::Error
fn is_binary_encoder() -> bool
fn encode_str( val: &T, ) -> Result<String, HybridCoderError<<E as HybridEncoder<T, String>>::Error>>
fn encode_bin(_val: &T) -> Result<Vec<u8>, HybridCoderError<Self::Error>>
Source§impl<T> LayoutRaw for T
impl<T> LayoutRaw for T
Source§fn layout_raw(_: <T as Pointee>::Metadata) -> Result<Layout, LayoutError>
fn layout_raw(_: <T as Pointee>::Metadata) -> Result<Layout, LayoutError>
Returns the layout of the type.
Source§impl<T, N1, N2> Niching<NichedOption<T, N1>> for N2
impl<T, N1, N2> Niching<NichedOption<T, N1>> for N2
Source§unsafe fn is_niched(niched: *const NichedOption<T, N1>) -> bool
unsafe fn is_niched(niched: *const NichedOption<T, N1>) -> bool
Returns whether the given value has been niched. Read more
Source§fn resolve_niched(out: Place<NichedOption<T, N1>>)
fn resolve_niched(out: Place<NichedOption<T, N1>>)
Writes data to
out
indicating that a T
is niched.