Struct Packed 

#[repr(transparent)]
pub struct Packed<T>(pub T);

Treat T as if its packed.

This corresponds to the “Bytes” type in the [data model of Müsli]. It encodes any Encode / Decode type “on after another” and is the equivalent of using #[musli(packed)] on a field.

This is only implemented for type where the default behavior is not to pack the value already, this applies to types which implements EncodePacked and DecodePacked.

Examples

use musli::{Allocator, Decode, Decoder};
use musli::compat::Packed;

struct Struct {
    field: u8,
    field2: u32,
}

impl<'de, M, A> Decode<'de, M, A> for Struct
where
    A: Allocator,
    Packed<(u8, u32)>: Decode<'de, M, A>
{
    #[inline]
    fn decode<D>(decoder: D) -> Result<Self, D::Error>
    where
        D: Decoder<'de, Mode = M, Allocator = A>,
    {
        let Packed((field, field2)) = decoder.decode()?;

        Ok(Struct {
            field,
            field2,
        })
    }
}

Tuple Fields

0: T

Trait Implementations

impl<'de, T, A> Decode<'de, Binary, A> for Packed<T>

where A: Allocator, T: EncodePacked<Binary> + DecodePacked<'de, Binary, A>,

const IS_BITWISE_DECODE: bool = false

Whether the type is packed. Packed types can be bitwise copied if the representation of the serialization format is identical to the memory layout of the type.

fn decode<T0>(_1: T0) -> Result<Self, <T0 as Decoder<'de>>::Error>

where T0: Decoder<'de, Mode = Binary, Allocator = A>,

Decode the current value.

impl<'de, T, A> Decode<'de, Text, A> for Packed<T>

where A: Allocator, T: EncodePacked<Text> + DecodePacked<'de, Text, A>,

const IS_BITWISE_DECODE: bool = false

Whether the type is packed. Packed types can be bitwise copied if the representation of the serialization format is identical to the memory layout of the type.

fn decode<T0>(_1: T0) -> Result<Self, <T0 as Decoder<'de>>::Error>

where T0: Decoder<'de, Mode = Text, Allocator = A>,

Decode the current value.

impl<T> Encode<Binary> for Packed<T>

where T: EncodePacked<Binary>,

const IS_BITWISE_ENCODE: bool = false

Whether the type is packed. Packed types can be bitwise copied if the representation of the serialization format is identical to the memory layout of the type.

type Encode = Packed<T>

The underlying type being encoded.

fn encode<T0>(&self, _0: T0) -> Result<(), <T0 as Encoder>::Error>

where T0: Encoder<Mode = Binary>,

Encode the given output.

fn size_hint(&self) -> Option<usize>

The number of fields in the type.

fn as_encode(&self) -> &Self::Encode

Coerce into the underlying value being encoded.

impl<T> Encode<Text> for Packed<T>

where T: EncodePacked<Text>,

const IS_BITWISE_ENCODE: bool = false

Whether the type is packed. Packed types can be bitwise copied if the representation of the serialization format is identical to the memory layout of the type.

type Encode = Packed<T>

The underlying type being encoded.

fn encode<T0>(&self, _0: T0) -> Result<(), <T0 as Encoder>::Error>

where T0: Encoder<Mode = Text>,

Encode the given output.

fn size_hint(&self) -> Option<usize>

The number of fields in the type.

fn as_encode(&self) -> &Self::Encode

Coerce into the underlying value being encoded.