Serde Unit Struct Derive

此crate为Serde的Serialize和Deserialize traits提供derive宏，使得单元结构体以字符串形式表示其名称。如果您想保留类型信息，即区分不同的单元结构体，这很有用。

没有serde_unit_struct

use serde::{Deserialize, Serialize};

#[derive(Deserialize, Serialize)]
struct Foo;

#[derive(Deserialize, Serialize)]
struct Bar;

fn main() {
    // Normally, unit structs serialize to null.
    let json = serde_json::to_string(&Foo).unwrap();
    assert_eq!(json, "null");

    // We can successfully deserialize them, but...
    let foo: Foo = serde_json::from_str(&json).unwrap();
    assert_eq!(foo, Foo);

    // ...this also works; the type information is lost.
    let bar: Bar = serde_json::from_str(&json).unwrap();
    assert_eq!(bar, Bar);
}

使用serde_unit_struct

use serde_unit_struct::{Deserialize_unit_struct, Serialize_unit_struct};

#[derive(Deserialize_unit_struct, Serialize_unit_struct)]
struct Foo;

#[derive(Deserialize_unit_struct, Serialize_unit_struct)]
struct Bar;

fn main() {
    // Now, unit structs serialise to their name as a string.
    let json = serde_json::to_string(&Foo).unwrap();
    assert_eq!(json, "\"Foo\"");

    // We can successfully deserialize them.
    let foo: Foo = serde_json::from_str(&json).unwrap();
    assert_eq!(foo, Foo);

    // Type information is maintained.
    let bar: Result<Bar, _> = serde_json::from_str(&json);
    assert!(bar.is_err());
}

许可

根据您的选择，受Apache License, Version 2.0或MIT license许可。

除非您明确声明，否则您有意提交给此crate的任何贡献，根据Apache-2.0许可定义，应如上所述双重许可，不附加任何额外条款或条件。