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drop/libraries/native_model/README.md.skt.md
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2023-12-17 10:44:54 +01:00

3.4 KiB

use bincode;
use bincode::{{Decode, Encode, config}};
use native_model_macro::native_model;

pub struct Bincode;

impl<T: bincode::Encode> native_model::Encode<T> for Bincode {{
    type Error = bincode::error::EncodeError;
    fn encode(obj: &T) -> Result<Vec<u8>, bincode::error::EncodeError> {{
        bincode::encode_to_vec(obj, config::standard())
    }}
}}

impl<T: bincode::Decode> native_model::Decode<T> for Bincode {{
    type Error = bincode::error::DecodeError;
    fn decode(data: Vec<u8>) -> Result<T, bincode::error::DecodeError> {{
        bincode::decode_from_slice(&data, config::standard()).map(|(result, _)| result)
    }}
}}

#[derive(Encode, Decode, PartialEq, Debug)]
#[native_model(id = 1, version = 1, with = Bincode)]
struct DotV1(u32, u32);

#[derive(Encode, Decode, PartialEq, Debug)]
#[native_model(id = 1, version = 2, with = Bincode, 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() {{
    {}
}}
use bincode::{{config, Decode, Encode}};

pub struct Bincode;

impl<T: bincode::Encode> native_model::Encode<T> for Bincode {{
    type Error = bincode::error::EncodeError;
    fn encode(obj: &T) -> Result<Vec<u8>, bincode::error::EncodeError> {{
        bincode::encode_to_vec(obj, config::standard())
    }}
}}

impl<T: bincode::Decode> native_model::Decode<T> for Bincode {{
    type Error = bincode::error::DecodeError;
    fn 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
    );
}}

{}

fn main() {{
}}