This crate provides a derive macro named SerdeDefault which derives Default from serde::Deserialize.

Usage

use default_from_serde::SerdeDefault;

#[derive(SerdeDefault, Deserialize)]
pub struct ComplexTypewithDefault {
    #[serde(default)]
    pub a: i32,
    #[serde(default = "default_b")]
    pub b: String,
    #[serde(default)]
    pub c: Vec<i32>,
}

fn default_b() -> String {
    "default".to_string()
}

fn main() {
    let x = ComplexTypewithDefault::default();

    assert_eq!(x.b, "default");
}

default-from-serde

Derive Default using serde::Deserialize! No mismatch between Default and Deserialize anymore!

Usage

Cargo.toml:

default-from-serde = "0.1"

See docs.rs for the Rust code.

License

APACHE-2.0.

Some source code are copied from serde_json. This library is practically deserialize using serde_json with {}.