pub trait Decode: Sized {
// Required method
fn decode<I>(input: &mut I) -> Result<Self, Error>
where I: Input;
// Provided methods
fn decode_into<I>(
input: &mut I,
dst: &mut MaybeUninit<Self>,
) -> Result<DecodeFinished, Error>
where I: Input { ... }
fn skip<I>(input: &mut I) -> Result<(), Error>
where I: Input { ... }
fn encoded_fixed_size() -> Option<usize> { ... }
}Expand description
Trait that allows zero-copy read of value-references from slices in LE format.
Required Methods§
Provided Methods§
Sourcefn decode_into<I>(
input: &mut I,
dst: &mut MaybeUninit<Self>,
) -> Result<DecodeFinished, Error>where
I: Input,
fn decode_into<I>(
input: &mut I,
dst: &mut MaybeUninit<Self>,
) -> Result<DecodeFinished, Error>where
I: Input,
Attempt to deserialize the value from input into a pre-allocated piece of memory.
The default implementation will just call Decode::decode.
§Safety
If this function returns Ok then dst must be properly initialized.
This is enforced by requiring the implementation to return a DecodeFinished
which can only be created by calling DecodeFinished::assert_decoding_finished which is
unsafe.
Sourcefn skip<I>(input: &mut I) -> Result<(), Error>where
I: Input,
fn skip<I>(input: &mut I) -> Result<(), Error>where
I: Input,
Attempt to skip the encoded value from input.
The default implementation of this function is just calling Decode::decode.
When possible, an implementation should provide a specialized implementation.
Sourcefn encoded_fixed_size() -> Option<usize>
fn encoded_fixed_size() -> Option<usize>
Returns the fixed encoded size of the type.
If it returns Some(size) then all possible values of this
type have the given size (in bytes) when encoded.
NOTE: A type with a fixed encoded size may return None.
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§
Source§impl Decode for RuntimeMetadata
impl Decode for RuntimeMetadata
fn decode<__CodecInputEdqy>(
__codec_input_edqy: &mut __CodecInputEdqy,
) -> Result<RuntimeMetadata, Error>where
__CodecInputEdqy: Input,
Source§impl Decode for RuntimeMetadataDeprecated
Available on crate feature decode only.
impl Decode for RuntimeMetadataDeprecated
Available on crate feature
decode only.