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Lily Mara 0a1cdc5107 Add the nu-serde crate (#3878 ) * Add the nu-serde crate nu-serde is a crate that can be used to turn a value implementing `serde::Serialize` into a `nu-protocol::Value`. This has the potential to significantly simplify plugin authorship. This crate was the previously independent [serde-nu](https://github.com/lily-mara/serde-nu) but the nushell maintainers expressed an interest in having it added to the mainline nushell repository. * fixup! Add the nu-serde crate		2021-07-31 22:03:13 -05:00
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src	Add the nu-serde crate (#3878 )	2021-07-31 22:03:13 -05:00
Cargo.toml	Add the nu-serde crate (#3878 )	2021-07-31 22:03:13 -05:00
README.md	Add the nu-serde crate (#3878 )	2021-07-31 22:03:13 -05:00

README.md

`serde-nu`

Convert any value implementing serde::Serialize into a nu_protocol::Value using nu_serde::to_value. Compare the below manual implemeentation and the one using nu_serde.

use nu_protocol::{Dictionary, Primitive, UntaggedValue, Value};
use nu_source::Tag;
use serde::Serialize;

#[derive(Serialize)]
struct MyStruct {
    index: usize,
    name: String,
}

fn manual(s: MyStruct, tag: Tag) -> Value {
    let mut dict = Dictionary::default();
    dict.insert(
        "index".into(),
        Value {
            value: UntaggedValue::Primitive(Primitive::Int(s.index as i64)),
            tag: tag.clone(),
        },
    );
    dict.insert(
        "name".into(),
        Value {
            value: UntaggedValue::Primitive(Primitive::String(s.name)),
            tag: tag.clone(),
        },
    );

    Value {
        value: UntaggedValue::Row(dict),
        tag,
    }
}

fn auto(s: &MyStruct, tag: Tag) -> Value {
    nu_serde::to_value(s, tag).unwrap()
}