```rust,skt-main
use bincode;
use bincode::{{Decode, Encode}};
use native_model_macro::native_model;
fn native_model_encode_body<T: bincode::Encode>(
model: &T,
) -> Result<Vec<u8>, bincode::error::EncodeError> {{
{{
bincode::encode_to_vec(model, bincode::config::standard())
}}
}}
fn native_model_decode_body<T: bincode::Decode>(
data: Vec<u8>,
) -> Result<T, bincode::error::DecodeError> {{
{{
bincode::decode_from_slice(&data, bincode::config::standard()).map(|(result, _)| result)
}}
}}
#[derive(Encode, Decode, PartialEq, Debug)]
#[native_model(id = 1, version = 1)]
struct DotV1(u32, u32);
#[derive(Encode, Decode, PartialEq, Debug)]
#[native_model(id = 1, version = 2, from = DotV1)]
struct DotV2 {{
name: String,
x: u64,
y: u64,
}}
impl From<DotV1> for DotV2 {{
fn from(dot: DotV1) -> Self {{
DotV2 {{
name: "".to_string(),
x: dot.0 as u64,
y: dot.1 as u64,
}}
}}
}}
impl From<DotV2> for DotV1 {{
fn from(dot: DotV2) -> Self {{
DotV1(dot.x as u32, dot.y as u32)
}}
}}
fn main() {{
{}
}}
```
```rust,skt-define-models
use bincode::{{config, Decode, Encode}};
#[allow(dead_code)]
fn native_model_encode_body<T: Encode>(obj: &T) -> Result<Vec<u8>, bincode::error::EncodeError> {{
bincode::encode_to_vec(obj, config::standard())
}}
#[allow(dead_code)]
fn native_model_decode_body<T: Decode>(data: Vec<u8>) -> Result<T, bincode::error::DecodeError> {{
bincode::decode_from_slice(&data, config::standard()).map(|(result, _)| result)
}}
{}
impl From<DotV1> for DotV2 {{
fn from(dot: DotV1) -> Self {{
DotV2 {{
name: "".to_string(),
x: dot.0 as u64,
y: dot.1 as u64,
}}
}}
}}
impl From<DotV2> for DotV1 {{
fn from(dot: DotV2) -> Self {{
DotV1(dot.x as u32, dot.y as u32)
}}
}}
impl TryFrom<DotV2> for DotV3 {{
type Error = anyhow::Error;
fn try_from(dot: DotV2) -> Result<Self, Self::Error> {{
Ok(DotV3 {{
name: dot.name,
cord: Cord {{ x: dot.x, y: dot.y }},
}})
}}
}}
impl TryFrom<DotV3> for DotV2 {{
type Error = anyhow::Error;
fn try_from(dot: DotV3) -> Result<Self, Self::Error> {{
Ok(DotV2 {{
name: dot.name,
x: dot.cord.x,
y: dot.cord.y,
}})
}}
}}
fn main() {{
let dot = DotV1(1, 2);
let bytes = native_model::encode(&dot).unwrap();
let (dot_decoded, _) = native_model::decode::<DotV1>(bytes.clone()).unwrap();
assert_eq!(dot, dot_decoded);
let (dot_decoded, _) = native_model::decode::<DotV2>(bytes.clone()).unwrap();
assert_eq!(
DotV2 {{
name: "".to_string(),
x: 1,
y: 2
}},
dot_decoded
);
let (dot_decoded, _) = native_model::decode::<DotV3>(bytes.clone()).unwrap();
assert_eq!(
DotV3 {{
name: "".to_string(),
cord: Cord {{ x: 1, y: 2 }}
}},
dot_decoded
);
}}
```