dyn_encoding/
error.rs

1//! Codec error type.
2
3use crate::value::WireTypeId;
4
5/// Errors produced by the codec layer.
6///
7/// All codec implementations report through this single enum so the
8/// [`CodecRegistry`](crate::CodecRegistry) can return `&dyn WireCodec`
9/// without erasing per-codec error types behind another `Box<dyn _>`.
10#[derive(Debug, thiserror::Error)]
11pub enum CodecError {
12    /// The codec has no encoder/decoder registered for the requested
13    /// wire type id.
14    #[error("unknown wire type id: {0}")]
15    UnknownTypeId(WireTypeId),
16
17    /// The value handed to `encode` does not have the type the
18    /// registered encoder expects. This indicates a logic bug in the
19    /// caller: the [`WireTypeId`] on the value matches a registration,
20    /// but the underlying concrete type is something else.
21    #[error(
22        "type mismatch for wire type id {expected}: value did not downcast to the registered type"
23    )]
24    TypeMismatch {
25        /// The wire type id the codec saw on the value.
26        expected: WireTypeId,
27    },
28
29    /// Underlying serializer rejected the value.
30    #[error("encode failure: {0}")]
31    Encode(#[source] Box<dyn std::error::Error + Send + Sync>),
32
33    /// Underlying deserializer rejected the bytes.
34    #[error("decode failure: {0}")]
35    Decode(#[source] Box<dyn std::error::Error + Send + Sync>),
36}
37
38impl CodecError {
39    /// Wrap an arbitrary serializer error as an encode failure.
40    pub fn encode_failure<E>(err: E) -> Self
41    where
42        E: Into<Box<dyn std::error::Error + Send + Sync>>,
43    {
44        Self::Encode(err.into())
45    }
46
47    /// Wrap an arbitrary deserializer error as a decode failure.
48    pub fn decode_failure<E>(err: E) -> Self
49    where
50        E: Into<Box<dyn std::error::Error + Send + Sync>>,
51    {
52        Self::Decode(err.into())
53    }
54}
dyn_encoding/error.rs

dyn_encoding/
error.rs
