Trait SizedEncode

pub trait SizedEncode: Encode {
    const MAX_ENCODED_SIZE: usize;
}

Denotes a size-constrained, encodable type.

When using Encode, the size of the resulting encoding cannot always be known beforehand. This trait defines an upper bound for these sizes.

Note that whilst technically having a size limit, alloc::vec::Vec, alloc::string::String, etc. do not implement this trait. The general rule is that the size limit must be a substantial part of a type’s design to constitute implementing this trait.

Also note that – in practice – this trait is not strictly enforceable. Users of this trait should assume that it is mostly properly defined, but still with the possibility of it not being such.

Required Associated Constants

const MAX_ENCODED_SIZE: usize

The maximum, guaranteed amount of bytes that can result from an encoding.

Implementors of this trait should make sure that no encoding (or decoding) consumes more than the amount specified by this constant.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl SizedEncode for Infallible

const MAX_ENCODED_SIZE: usize = 0usize

impl SizedEncode for c_void

const MAX_ENCODED_SIZE: usize = 0usize

impl SizedEncode for IpAddr

const MAX_ENCODED_SIZE: usize = 17usize

impl SizedEncode for SocketAddr

const MAX_ENCODED_SIZE: usize = 27usize

impl SizedEncode for bool

const MAX_ENCODED_SIZE: usize = 1usize

impl SizedEncode for char

const MAX_ENCODED_SIZE: usize = 4usize

impl SizedEncode for f16

Available on crate feature f16 only.

const MAX_ENCODED_SIZE: usize = 2usize

impl SizedEncode for f32

const MAX_ENCODED_SIZE: usize = 4usize

impl SizedEncode for f64

const MAX_ENCODED_SIZE: usize = 8usize

impl SizedEncode for f128

Available on crate feature f128 only.

const MAX_ENCODED_SIZE: usize = 16usize

impl SizedEncode for i8

const MAX_ENCODED_SIZE: usize = 1usize

impl SizedEncode for i16

const MAX_ENCODED_SIZE: usize = 2usize

impl SizedEncode for i32

const MAX_ENCODED_SIZE: usize = 4usize

impl SizedEncode for i64

const MAX_ENCODED_SIZE: usize = 8usize

impl SizedEncode for i128

const MAX_ENCODED_SIZE: usize = 16usize

impl SizedEncode for isize

const MAX_ENCODED_SIZE: usize = 2usize

impl SizedEncode for u8

const MAX_ENCODED_SIZE: usize = 1usize

impl SizedEncode for u16

const MAX_ENCODED_SIZE: usize = 2usize

impl SizedEncode for u32

const MAX_ENCODED_SIZE: usize = 4usize

impl SizedEncode for u64

const MAX_ENCODED_SIZE: usize = 8usize

impl SizedEncode for u128

const MAX_ENCODED_SIZE: usize = 16usize

impl SizedEncode for ()

const MAX_ENCODED_SIZE: usize = 0usize

impl SizedEncode for usize

const MAX_ENCODED_SIZE: Self = 2usize

impl SizedEncode for PhantomPinned

const MAX_ENCODED_SIZE: usize = 0usize

impl SizedEncode for Ipv4Addr

const MAX_ENCODED_SIZE: usize = 4usize

impl SizedEncode for Ipv6Addr

const MAX_ENCODED_SIZE: usize = 16usize

impl SizedEncode for SocketAddrV4

const MAX_ENCODED_SIZE: usize = 6usize

impl SizedEncode for SocketAddrV6

const MAX_ENCODED_SIZE: usize = 26usize

impl SizedEncode for NonZero<i8>

const MAX_ENCODED_SIZE: usize = 1usize

impl SizedEncode for NonZero<i16>

const MAX_ENCODED_SIZE: usize = 2usize

impl SizedEncode for NonZero<i32>

const MAX_ENCODED_SIZE: usize = 4usize

impl SizedEncode for NonZero<i64>

const MAX_ENCODED_SIZE: usize = 8usize

impl SizedEncode for NonZero<i128>

const MAX_ENCODED_SIZE: usize = 16usize

impl SizedEncode for NonZero<isize>

const MAX_ENCODED_SIZE: usize = 2usize

impl SizedEncode for NonZero<u8>

const MAX_ENCODED_SIZE: usize = 1usize

impl SizedEncode for NonZero<u16>

const MAX_ENCODED_SIZE: usize = 2usize

impl SizedEncode for NonZero<u32>

const MAX_ENCODED_SIZE: usize = 4usize

impl SizedEncode for NonZero<u64>

const MAX_ENCODED_SIZE: usize = 8usize

impl SizedEncode for NonZero<u128>

const MAX_ENCODED_SIZE: usize = 16usize

impl SizedEncode for NonZero<usize>

const MAX_ENCODED_SIZE: usize = 2usize

impl SizedEncode for RangeFull

const MAX_ENCODED_SIZE: usize = 0usize

impl SizedEncode for AtomicBool

Available on target_has_atomic="8" only.

const MAX_ENCODED_SIZE: usize = 1usize

impl SizedEncode for AtomicI8

Available on target_has_atomic="8" only.

const MAX_ENCODED_SIZE: usize = 1usize

impl SizedEncode for AtomicI16

Available on target_has_atomic="16" only.

const MAX_ENCODED_SIZE: usize = 2usize

impl SizedEncode for AtomicI32

Available on target_has_atomic="32" only.

const MAX_ENCODED_SIZE: usize = 4usize

impl SizedEncode for AtomicI64

Available on target_has_atomic="64" only.

const MAX_ENCODED_SIZE: usize = 8usize

impl SizedEncode for AtomicIsize

Available on target_has_atomic="ptr" only.

const MAX_ENCODED_SIZE: usize = 2usize

impl SizedEncode for AtomicU8

Available on target_has_atomic="8" only.

const MAX_ENCODED_SIZE: usize = 1usize

impl SizedEncode for AtomicU16

Available on target_has_atomic="16" only.

const MAX_ENCODED_SIZE: usize = 2usize

impl SizedEncode for AtomicU32

Available on target_has_atomic="32" only.

const MAX_ENCODED_SIZE: usize = 4usize

impl SizedEncode for AtomicU64

Available on target_has_atomic="64" only.

const MAX_ENCODED_SIZE: usize = 8usize

impl SizedEncode for AtomicUsize

Available on target_has_atomic="ptr" only.

const MAX_ENCODED_SIZE: usize = 2usize

impl SizedEncode for Duration

const MAX_ENCODED_SIZE: usize = 12usize

impl SizedEncode for SystemTime

Available on crate feature std only.

const MAX_ENCODED_SIZE: usize = 8usize

impl<T, E, Err> SizedEncode for Result<T, E>

where T: Encode<Error = Err> + SizedEncode, E: Encode<Error: Into<Err>> + SizedEncode,

const MAX_ENCODED_SIZE: usize

impl<T: Copy + SizedEncode> SizedEncode for Cell<T>

const MAX_ENCODED_SIZE: usize = T::MAX_ENCODED_SIZE

impl<T: SizedEncode + ?Sized + ToOwned> SizedEncode for Cow<'_, T>

Available on crate feature alloc only.

const MAX_ENCODED_SIZE: usize = T::MAX_ENCODED_SIZE

impl<T: SizedEncode + ?Sized> SizedEncode for &T

const MAX_ENCODED_SIZE: usize = T::MAX_ENCODED_SIZE

impl<T: SizedEncode + ?Sized> SizedEncode for &mut T

const MAX_ENCODED_SIZE: usize = T::MAX_ENCODED_SIZE

impl<T: SizedEncode + ?Sized> SizedEncode for Box<T>

Available on crate feature alloc only.

const MAX_ENCODED_SIZE: usize = T::MAX_ENCODED_SIZE

impl<T: SizedEncode + ?Sized> SizedEncode for Rc<T>

Available on crate feature alloc only.

const MAX_ENCODED_SIZE: usize = T::MAX_ENCODED_SIZE

impl<T: SizedEncode + ?Sized> SizedEncode for Arc<T>

Available on crate feature alloc and target_has_atomic="ptr" only.

const MAX_ENCODED_SIZE: usize = T::MAX_ENCODED_SIZE

impl<T: SizedEncode + ?Sized> SizedEncode for RefCell<T>

const MAX_ENCODED_SIZE: usize = T::MAX_ENCODED_SIZE

impl<T: SizedEncode + ?Sized> SizedEncode for Mutex<T>

Available on crate feature std only.

const MAX_ENCODED_SIZE: usize = T::MAX_ENCODED_SIZE

impl<T: SizedEncode + ?Sized> SizedEncode for RwLock<T>

Available on crate feature std only.

const MAX_ENCODED_SIZE: usize = T::MAX_ENCODED_SIZE

impl<T: SizedEncode> SizedEncode for Bound<T>

const MAX_ENCODED_SIZE: usize

impl<T: SizedEncode> SizedEncode for Option<T>

const MAX_ENCODED_SIZE: usize

impl<T: SizedEncode> SizedEncode for (T₁, T₂, …, Tₙ)

Implemented for tuples with up to twelve members.

impl<T: SizedEncode> SizedEncode for Weak<T>

Available on crate feature alloc only.

const MAX_ENCODED_SIZE: usize = Option<Rc<T>>::MAX_ENCODED_SIZE

impl<T: SizedEncode> SizedEncode for Weak<T>

Available on crate feature alloc and target_has_atomic="ptr" only.

const MAX_ENCODED_SIZE: usize = Option<Arc<T>>::MAX_ENCODED_SIZE

impl<T: SizedEncode> SizedEncode for LazyCell<T>

const MAX_ENCODED_SIZE: usize = T::MAX_ENCODED_SIZE

impl<T: SizedEncode> SizedEncode for UnsafeCell<T>

const MAX_ENCODED_SIZE: usize = T::MAX_ENCODED_SIZE

impl<T: SizedEncode> SizedEncode for Saturating<T>

const MAX_ENCODED_SIZE: usize = T::MAX_ENCODED_SIZE

impl<T: SizedEncode> SizedEncode for Wrapping<T>

const MAX_ENCODED_SIZE: usize = T::MAX_ENCODED_SIZE

impl<T: SizedEncode> SizedEncode for Range<T>

const MAX_ENCODED_SIZE: usize

impl<T: SizedEncode> SizedEncode for RangeFrom<T>

const MAX_ENCODED_SIZE: usize = T::MAX_ENCODED_SIZE

impl<T: SizedEncode> SizedEncode for RangeInclusive<T>

const MAX_ENCODED_SIZE: usize

impl<T: SizedEncode> SizedEncode for RangeTo<T>

const MAX_ENCODED_SIZE: usize = T::MAX_ENCODED_SIZE

impl<T: SizedEncode> SizedEncode for RangeToInclusive<T>

const MAX_ENCODED_SIZE: usize = T::MAX_ENCODED_SIZE

impl<T: SizedEncode> SizedEncode for LazyLock<T>

Available on crate feature std only.

const MAX_ENCODED_SIZE: usize = T::MAX_ENCODED_SIZE

impl<T: SizedEncode, const N: usize> SizedEncode for [T; N]

const MAX_ENCODED_SIZE: usize

impl<T: ?Sized> SizedEncode for PhantomData<T>

const MAX_ENCODED_SIZE: usize = 0usize

Implementors