Trait parity_scale_codec::EncodeLike

pub trait EncodeLike<T: Encode = Self>: Sized + Encode { }

A marker trait that tells the compiler that a type encode to the same representation as another type.

E.g. Vec<u8> has the same encoded representation as &[u8].

Example

fn encode_like<T: Encode, R: EncodeLike<T>>(data: &R) {
    data.encode(); // Valid `T` encoded value.
}

fn main() {
    // Just pass the a reference to the normal tuple.
    encode_like::<(u32, u32), _>(&(1u32, 2u32));
    // Pass a tuple of references
    encode_like::<(u32, u32), _>(&(&1u32, &2u32));
    // Pass a tuple of a reference and a value.
    encode_like::<(u32, u32), _>(&(&1u32, 2u32));
}

Warning

The relation is not symetric, T implements EncodeLike<U> does not mean U has same representation as T. For instance we could imaging a non zero integer to be encoded to the same representation as the said integer but not the other way around.

Limitation

Not all possible implementations of EncodeLike are implemented (for instance Box<Box<u32>> does not implement EncodeLike<u32>). To bypass this issue either open a PR to add the new combination or use Ref reference wrapper or define your own wrapper and implement EncodeLike on it as such:

fn encode_like<T: Encode, R: EncodeLike<T>>(data: &R) {
    data.encode(); // Valid `T` encoded value.
}

struct MyWrapper<'a>(&'a (Box<Box<u32>>, u32));
impl<'a> core::ops::Deref for MyWrapper<'a> { // Or use derive_deref crate
    type Target = (Box<Box<u32>>, u32);
    fn deref(&self) -> &Self::Target { &self.0 }
}

impl<'a> parity_scale_codec::WrapperTypeEncode for MyWrapper<'a> {}
impl<'a> parity_scale_codec::EncodeLike<(u32, u32)> for MyWrapper<'a> {}

fn main() {
    let v = (Box::new(Box::new(0)), 0);
    encode_like::<(u32, u32), _>(&MyWrapper(&v));
}

Implementations on Foreign Types

impl<T: ?Sized + Encode> EncodeLike<Box<T, Global>> for Box<T>

impl<T: Encode> EncodeLike<T> for Box<T>

impl<T: ?Sized + Encode> EncodeLike<&'_ T> for &T

impl<T: Encode> EncodeLike<T> for &T

impl<T: Encode> EncodeLike<T> for &&T

impl<T: ?Sized + Encode> EncodeLike<&'_ mut T> for &mut T

impl<T: Encode> EncodeLike<T> for &mut T

impl<'a, T: ToOwned + Encode + ?Sized> EncodeLike<Cow<'a, T>> for Cow<'a, T>

impl<'a, T: ToOwned + Encode> EncodeLike<T> for Cow<'a, T>

impl<T: ?Sized + Encode> EncodeLike<Arc<T>> for Arc<T>

impl<T: Encode> EncodeLike<T> for Arc<T>

impl<T: ?Sized + Encode> EncodeLike<Rc<T>> for Rc<T>

impl<T: Encode> EncodeLike<T> for Rc<T>

impl EncodeLike<String> for String

impl EncodeLike<&'_ str> for String

impl EncodeLike<String> for &str

impl<T, LikeT, E, LikeE> EncodeLike<Result<LikeT, LikeE>> for Result<T, E> where
    T: EncodeLike<LikeT>,
    LikeT: Encode,
    E: EncodeLike<LikeE>,
    LikeE: Encode, 

impl<T: EncodeLike<U>, U: Encode> EncodeLike<Option<U>> for Option<T>

impl<T: EncodeLike<U>, U: Encode, const N: usize> EncodeLike<[U; N]> for [T; N]

impl<T> EncodeLike<PhantomData<T>> for PhantomData<T>

impl<T: EncodeLike<U>, U: Encode> EncodeLike<Vec<U, Global>> for Vec<T>

impl<T: EncodeLike<U>, U: Encode> EncodeLike<&'_ [U]> for Vec<T>

impl<T: EncodeLike<U>, U: Encode> EncodeLike<Vec<U, Global>> for &[T]

impl<K: EncodeLike<LikeK>, LikeK: Encode, V: EncodeLike<LikeV>, LikeV: Encode> EncodeLike<BTreeMap<LikeK, LikeV>> for BTreeMap<K, V>

impl<K: EncodeLike<LikeK>, LikeK: Encode, V: EncodeLike<LikeV>, LikeV: Encode> EncodeLike<&'_ [(LikeK, LikeV)]> for BTreeMap<K, V>

impl<K: EncodeLike<LikeK>, LikeK: Encode, V: EncodeLike<LikeV>, LikeV: Encode> EncodeLike<BTreeMap<LikeK, LikeV>> for &[(K, V)]

impl<T: EncodeLike<LikeT>, LikeT: Encode> EncodeLike<BTreeSet<LikeT>> for BTreeSet<T>

impl<T: EncodeLike<LikeT>, LikeT: Encode> EncodeLike<&'_ [(LikeT,)]> for BTreeSet<T>

impl<T: EncodeLike<LikeT>, LikeT: Encode> EncodeLike<BTreeSet<LikeT>> for &[(T,)]

impl<T: EncodeLike<LikeT>, LikeT: Encode> EncodeLike<LinkedList<LikeT>> for LinkedList<T>

impl<T: EncodeLike<LikeT>, LikeT: Encode> EncodeLike<&'_ [(LikeT,)]> for LinkedList<T>

impl<T: EncodeLike<LikeT>, LikeT: Encode> EncodeLike<LinkedList<LikeT>> for &[(T,)]

impl<T: EncodeLike<LikeT>, LikeT: Encode> EncodeLike<BinaryHeap<LikeT>> for BinaryHeap<T>

impl<T: EncodeLike<LikeT>, LikeT: Encode> EncodeLike<&'_ [(LikeT,)]> for BinaryHeap<T>

impl<T: EncodeLike<LikeT>, LikeT: Encode> EncodeLike<BinaryHeap<LikeT>> for &[(T,)]

impl<T: Encode> EncodeLike<VecDeque<T>> for VecDeque<T>

impl<T: EncodeLike<U>, U: Encode> EncodeLike<&'_ [U]> for VecDeque<T>

impl<T: EncodeLike<U>, U: Encode> EncodeLike<VecDeque<U>> for &[T]

impl<T: EncodeLike<U>, U: Encode> EncodeLike<Vec<U, Global>> for VecDeque<T>

impl<T: EncodeLike<U>, U: Encode> EncodeLike<VecDeque<U>> for Vec<T>

impl EncodeLike<()> for ()

impl<A0: EncodeLike<A1>, A1: Encode, B0: EncodeLike<B1>, B1: Encode, C0: EncodeLike<C1>, C1: Encode, D0: EncodeLike<D1>, D1: Encode, E0: EncodeLike<E1>, E1: Encode, F0: EncodeLike<F1>, F1: Encode, G0: EncodeLike<G1>, G1: Encode, H0: EncodeLike<H1>, H1: Encode, I0: EncodeLike<I1>, I1: Encode, J0: EncodeLike<J1>, J1: Encode, K0: EncodeLike<K1>, K1: Encode, L0: EncodeLike<L1>, L1: Encode, M0: EncodeLike<M1>, M1: Encode, N0: EncodeLike<N1>, N1: Encode, O0: EncodeLike<O1>, O1: Encode, P0: EncodeLike<P1>, P1: Encode, Q0: EncodeLike<Q1>, Q1: Encode, R0: EncodeLike<R1>, R1: Encode> EncodeLike<(A1, B1, C1, D1, E1, F1, G1, H1, I1, J1, K1, L1, M1, N1, O1, P1, Q1, R1)> for (A0, B0, C0, D0, E0, F0, G0, H0, I0, J0, K0, L0, M0, N0, O0, P0, Q0, R0)

impl<B0: EncodeLike<B1>, B1: Encode, C0: EncodeLike<C1>, C1: Encode, D0: EncodeLike<D1>, D1: Encode, E0: EncodeLike<E1>, E1: Encode, F0: EncodeLike<F1>, F1: Encode, G0: EncodeLike<G1>, G1: Encode, H0: EncodeLike<H1>, H1: Encode, I0: EncodeLike<I1>, I1: Encode, J0: EncodeLike<J1>, J1: Encode, K0: EncodeLike<K1>, K1: Encode, L0: EncodeLike<L1>, L1: Encode, M0: EncodeLike<M1>, M1: Encode, N0: EncodeLike<N1>, N1: Encode, O0: EncodeLike<O1>, O1: Encode, P0: EncodeLike<P1>, P1: Encode, Q0: EncodeLike<Q1>, Q1: Encode, R0: EncodeLike<R1>, R1: Encode> EncodeLike<(B1, C1, D1, E1, F1, G1, H1, I1, J1, K1, L1, M1, N1, O1, P1, Q1, R1)> for (B0, C0, D0, E0, F0, G0, H0, I0, J0, K0, L0, M0, N0, O0, P0, Q0, R0)

impl<C0: EncodeLike<C1>, C1: Encode, D0: EncodeLike<D1>, D1: Encode, E0: EncodeLike<E1>, E1: Encode, F0: EncodeLike<F1>, F1: Encode, G0: EncodeLike<G1>, G1: Encode, H0: EncodeLike<H1>, H1: Encode, I0: EncodeLike<I1>, I1: Encode, J0: EncodeLike<J1>, J1: Encode, K0: EncodeLike<K1>, K1: Encode, L0: EncodeLike<L1>, L1: Encode, M0: EncodeLike<M1>, M1: Encode, N0: EncodeLike<N1>, N1: Encode, O0: EncodeLike<O1>, O1: Encode, P0: EncodeLike<P1>, P1: Encode, Q0: EncodeLike<Q1>, Q1: Encode, R0: EncodeLike<R1>, R1: Encode> EncodeLike<(C1, D1, E1, F1, G1, H1, I1, J1, K1, L1, M1, N1, O1, P1, Q1, R1)> for (C0, D0, E0, F0, G0, H0, I0, J0, K0, L0, M0, N0, O0, P0, Q0, R0)

impl<D0: EncodeLike<D1>, D1: Encode, E0: EncodeLike<E1>, E1: Encode, F0: EncodeLike<F1>, F1: Encode, G0: EncodeLike<G1>, G1: Encode, H0: EncodeLike<H1>, H1: Encode, I0: EncodeLike<I1>, I1: Encode, J0: EncodeLike<J1>, J1: Encode, K0: EncodeLike<K1>, K1: Encode, L0: EncodeLike<L1>, L1: Encode, M0: EncodeLike<M1>, M1: Encode, N0: EncodeLike<N1>, N1: Encode, O0: EncodeLike<O1>, O1: Encode, P0: EncodeLike<P1>, P1: Encode, Q0: EncodeLike<Q1>, Q1: Encode, R0: EncodeLike<R1>, R1: Encode> EncodeLike<(D1, E1, F1, G1, H1, I1, J1, K1, L1, M1, N1, O1, P1, Q1, R1)> for (D0, E0, F0, G0, H0, I0, J0, K0, L0, M0, N0, O0, P0, Q0, R0)

impl<E0: EncodeLike<E1>, E1: Encode, F0: EncodeLike<F1>, F1: Encode, G0: EncodeLike<G1>, G1: Encode, H0: EncodeLike<H1>, H1: Encode, I0: EncodeLike<I1>, I1: Encode, J0: EncodeLike<J1>, J1: Encode, K0: EncodeLike<K1>, K1: Encode, L0: EncodeLike<L1>, L1: Encode, M0: EncodeLike<M1>, M1: Encode, N0: EncodeLike<N1>, N1: Encode, O0: EncodeLike<O1>, O1: Encode, P0: EncodeLike<P1>, P1: Encode, Q0: EncodeLike<Q1>, Q1: Encode, R0: EncodeLike<R1>, R1: Encode> EncodeLike<(E1, F1, G1, H1, I1, J1, K1, L1, M1, N1, O1, P1, Q1, R1)> for (E0, F0, G0, H0, I0, J0, K0, L0, M0, N0, O0, P0, Q0, R0)

impl<F0: EncodeLike<F1>, F1: Encode, G0: EncodeLike<G1>, G1: Encode, H0: EncodeLike<H1>, H1: Encode, I0: EncodeLike<I1>, I1: Encode, J0: EncodeLike<J1>, J1: Encode, K0: EncodeLike<K1>, K1: Encode, L0: EncodeLike<L1>, L1: Encode, M0: EncodeLike<M1>, M1: Encode, N0: EncodeLike<N1>, N1: Encode, O0: EncodeLike<O1>, O1: Encode, P0: EncodeLike<P1>, P1: Encode, Q0: EncodeLike<Q1>, Q1: Encode, R0: EncodeLike<R1>, R1: Encode> EncodeLike<(F1, G1, H1, I1, J1, K1, L1, M1, N1, O1, P1, Q1, R1)> for (F0, G0, H0, I0, J0, K0, L0, M0, N0, O0, P0, Q0, R0)

impl<G0: EncodeLike<G1>, G1: Encode, H0: EncodeLike<H1>, H1: Encode, I0: EncodeLike<I1>, I1: Encode, J0: EncodeLike<J1>, J1: Encode, K0: EncodeLike<K1>, K1: Encode, L0: EncodeLike<L1>, L1: Encode, M0: EncodeLike<M1>, M1: Encode, N0: EncodeLike<N1>, N1: Encode, O0: EncodeLike<O1>, O1: Encode, P0: EncodeLike<P1>, P1: Encode, Q0: EncodeLike<Q1>, Q1: Encode, R0: EncodeLike<R1>, R1: Encode> EncodeLike<(G1, H1, I1, J1, K1, L1, M1, N1, O1, P1, Q1, R1)> for (G0, H0, I0, J0, K0, L0, M0, N0, O0, P0, Q0, R0)

impl<H0: EncodeLike<H1>, H1: Encode, I0: EncodeLike<I1>, I1: Encode, J0: EncodeLike<J1>, J1: Encode, K0: EncodeLike<K1>, K1: Encode, L0: EncodeLike<L1>, L1: Encode, M0: EncodeLike<M1>, M1: Encode, N0: EncodeLike<N1>, N1: Encode, O0: EncodeLike<O1>, O1: Encode, P0: EncodeLike<P1>, P1: Encode, Q0: EncodeLike<Q1>, Q1: Encode, R0: EncodeLike<R1>, R1: Encode> EncodeLike<(H1, I1, J1, K1, L1, M1, N1, O1, P1, Q1, R1)> for (H0, I0, J0, K0, L0, M0, N0, O0, P0, Q0, R0)

impl<I0: EncodeLike<I1>, I1: Encode, J0: EncodeLike<J1>, J1: Encode, K0: EncodeLike<K1>, K1: Encode, L0: EncodeLike<L1>, L1: Encode, M0: EncodeLike<M1>, M1: Encode, N0: EncodeLike<N1>, N1: Encode, O0: EncodeLike<O1>, O1: Encode, P0: EncodeLike<P1>, P1: Encode, Q0: EncodeLike<Q1>, Q1: Encode, R0: EncodeLike<R1>, R1: Encode> EncodeLike<(I1, J1, K1, L1, M1, N1, O1, P1, Q1, R1)> for (I0, J0, K0, L0, M0, N0, O0, P0, Q0, R0)

impl<J0: EncodeLike<J1>, J1: Encode, K0: EncodeLike<K1>, K1: Encode, L0: EncodeLike<L1>, L1: Encode, M0: EncodeLike<M1>, M1: Encode, N0: EncodeLike<N1>, N1: Encode, O0: EncodeLike<O1>, O1: Encode, P0: EncodeLike<P1>, P1: Encode, Q0: EncodeLike<Q1>, Q1: Encode, R0: EncodeLike<R1>, R1: Encode> EncodeLike<(J1, K1, L1, M1, N1, O1, P1, Q1, R1)> for (J0, K0, L0, M0, N0, O0, P0, Q0, R0)

impl<K0: EncodeLike<K1>, K1: Encode, L0: EncodeLike<L1>, L1: Encode, M0: EncodeLike<M1>, M1: Encode, N0: EncodeLike<N1>, N1: Encode, O0: EncodeLike<O1>, O1: Encode, P0: EncodeLike<P1>, P1: Encode, Q0: EncodeLike<Q1>, Q1: Encode, R0: EncodeLike<R1>, R1: Encode> EncodeLike<(K1, L1, M1, N1, O1, P1, Q1, R1)> for (K0, L0, M0, N0, O0, P0, Q0, R0)

impl<L0: EncodeLike<L1>, L1: Encode, M0: EncodeLike<M1>, M1: Encode, N0: EncodeLike<N1>, N1: Encode, O0: EncodeLike<O1>, O1: Encode, P0: EncodeLike<P1>, P1: Encode, Q0: EncodeLike<Q1>, Q1: Encode, R0: EncodeLike<R1>, R1: Encode> EncodeLike<(L1, M1, N1, O1, P1, Q1, R1)> for (L0, M0, N0, O0, P0, Q0, R0)

impl<M0: EncodeLike<M1>, M1: Encode, N0: EncodeLike<N1>, N1: Encode, O0: EncodeLike<O1>, O1: Encode, P0: EncodeLike<P1>, P1: Encode, Q0: EncodeLike<Q1>, Q1: Encode, R0: EncodeLike<R1>, R1: Encode> EncodeLike<(M1, N1, O1, P1, Q1, R1)> for (M0, N0, O0, P0, Q0, R0)

impl<N0: EncodeLike<N1>, N1: Encode, O0: EncodeLike<O1>, O1: Encode, P0: EncodeLike<P1>, P1: Encode, Q0: EncodeLike<Q1>, Q1: Encode, R0: EncodeLike<R1>, R1: Encode> EncodeLike<(N1, O1, P1, Q1, R1)> for (N0, O0, P0, Q0, R0)

impl<O0: EncodeLike<O1>, O1: Encode, P0: EncodeLike<P1>, P1: Encode, Q0: EncodeLike<Q1>, Q1: Encode, R0: EncodeLike<R1>, R1: Encode> EncodeLike<(O1, P1, Q1, R1)> for (O0, P0, Q0, R0)

impl<P0: EncodeLike<P1>, P1: Encode, Q0: EncodeLike<Q1>, Q1: Encode, R0: EncodeLike<R1>, R1: Encode> EncodeLike<(P1, Q1, R1)> for (P0, Q0, R0)

impl<Q0: EncodeLike<Q1>, Q1: Encode, R0: EncodeLike<R1>, R1: Encode> EncodeLike<(Q1, R1)> for (Q0, R0)

impl<R0: EncodeLike<R1>, R1: Encode> EncodeLike<(R1,)> for (R0,)

impl EncodeLike<u16> for u16

impl EncodeLike<u32> for u32

impl EncodeLike<u64> for u64

impl EncodeLike<u128> for u128

impl EncodeLike<i16> for i16

impl EncodeLike<i32> for i32

impl EncodeLike<i64> for i64

impl EncodeLike<i128> for i128

impl EncodeLike<u8> for u8

impl EncodeLike<i8> for i8

impl EncodeLike<bool> for bool

impl EncodeLike<Duration> for Duration

Loading content...

Implementors

impl EncodeLike<OptionBool> for OptionBool

impl<'a, T: ToOwned + Encode> EncodeLike<Cow<'a, T>> for T

impl<'a, T: EncodeLike<U>, U: Encode> EncodeLike<U> for &Ref<'a, T, U>

impl<'a, T: EncodeLike<U>, U: Encode> EncodeLike<U> for Ref<'a, T, U>

impl<T> EncodeLike<Compact<T>> for Compact<T> where
    CompactRef<'a, T>: Encode, 

impl<T: Encode> EncodeLike<&'_ &'_ T> for T

impl<T: Encode> EncodeLike<&'_ T> for T

impl<T: Encode> EncodeLike<&'_ mut T> for T

impl<T: Encode> EncodeLike<Box<T, Global>> for T

impl<T: Encode> EncodeLike<Rc<T>> for T

impl<T: Encode> EncodeLike<Arc<T>> for T

Loading content...